View source for Socialist International

{{About|the modern alliance of social democratic political parties|the historic alliance of left-wing and socialist parties|Second International}}{{Short description|Political international}}
{{use dmy dates|date=January 2023}}
{{Infobox organization
| name                     = Socialist International
| image                    = Red Rose (Socialism).svg
| image_border             = 
| size                     = 100px
| alt                      = 
| caption                  = Socialist International logo
| map                      = Parties of Socialist International.svg
| malt                     = 
| mcaption                 = Light red: Countries with a political party affiliated with the Socialist International<br>Dark red: Countries with the ruling party affiliated with the Socialist International
| map2                     = 
| abbreviation             = SI
| motto                    = 
| predecessor              = [[Labour and Socialist International]]
| successor                = 
| formation                = {{start date and age|df=yes|1951|06|03}}
| extinction               = 
| type                     = [[International non-governmental organization]]
| status                   = 
| purpose                  = "Strengthen relations between the affiliated parties and to coordinate their political attitudes and activities"<ref name="statutes">{{cite web|title=Statutes of the Socialist International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=27|publisher=Socialist International}}</ref>
| headquarters             = 
| location                 = [[London]], {{postcode|SW|4}}<br />[[United Kingdom]]
| coords                   = 
| region_served            = Worldwide
| membership               = 119 political parties and 13 affiliated organizations
| language                 = 
| leader_title             = President
| leader_name              = [[Pedro Sánchez]]
| leader_title2            = Secretary General
| leader_name2             = [[Benedicta Lasi]]
| leader_title3            = 
| leader_name3             = 
| leader_title4            = 
| leader_name4             = 
| key_people               = 
| main_organ               = Congress of the Socialist International
| parent_organization      = 
| affiliations             = 
| budget                   = £1.4 million {{small|(2014)}}<ref>{{cite web|title=Finances of the International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=2134|publisher=Socialist International}}</ref>
| num_staff                = 
| num_volunteers           = 
| website                  = [https://www.socialistinternational.org/ socialistinternational.org]
| remarks                  = 
| former name              = 
| secessions               = [[Progressive Alliance]]
}}
{{Socialism sidebar|orgs}}
{{Social democracy sidebar|orgs}}
The '''Socialist International''' ('''SI''') is a [[political international]] or worldwide organisation of political parties which seek to establish [[democratic socialism]],<ref name="statutes"/> consisting mostly of [[Social democracy|social democratic]] political parties and [[Labour movement|labour]] organisations.

Although formed in 1951 as a successor to the [[Labour and Socialist International]], it has antecedents in the late 19th century. The organisation currently includes 132 member parties<ref>{{cite web|title=About Us|url=http://www.socialistinternational.org/about.cfm|publisher=Socialist International}}</ref> and organisations from over 100 countries. Its members have governed in many countries, including most of Europe. In 2013, a schism in the SI led to the establishment of the [[Progressive Alliance]].<ref name="Quimpo2020">{{cite book|author=Nathan Gilbert Quimpo|chapter=The Post-war Rise and Decline of the Left|editor1= Toby Carroll|editor2=Shahar Hameiri|editor3=Lee Jones|title=The Political Economy of Southeast Asia: Politics and Uneven Development Under Hyperglobalisation|chapter-url=https://books.google.com/books?id=B1TUDwAAQBAJ&pg=PA150|year=2020|publisher= Springer Nature|isbn=978-3-03-028255-4|page=150}}</ref>

The current secretary general of the SI is [[Benedicta Lasi]] of [[Ghana]] and the current president of the SI is the [[Prime Minister of Spain|prime minister of Spain]], [[Pedro Sánchez]],<ref name="presidium">{{cite web|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=11|title=Presidium|publisher=Socialist International}}</ref> both of whom were elected at the last SI Congress held in Madrid, Spain, in November 2022.

==History==
===First and Second Internationals (1864–1916)===
The [[International Workingmen's Association]], also known as the First International, was the first international body to bring together organisations representing the [[working class]].{{sfn|Lamb|Docherty|2006|p=176}} It was formed in [[London]] on 28 September 1864 by socialist, communist and anarchist political groups and trade unions.{{sfn|Lamb|Docherty|2006|p=xxiv}} Tensions between moderates and revolutionaries led to its dissolution in 1876 in [[Philadelphia]].{{sfn|Lamb|Docherty|2006|p=xxv}}

The [[Second International]] was formed in Paris on 14 July 1889 as an association of the socialist parties.{{sfn|Lamb|Docherty|2006|p=302}} Differences over [[World War I]] led to the Second International being dissolved in 1916.

===Labour and Socialist International (1919–1940)===
The [[International Socialist Commission]] (ISC), also known as the Berne International, was formed in February 1919 at a meeting in [[Bern]] by parties that wanted to resurrect the Second International.{{sfn|Lamb|Docherty|2006|p=52}} In March 1919, Communist parties formed the [[Communist International]] ("Comintern"), the Third International, at a [[1st Congress of the Comintern|meeting in Moscow]].{{sfn|Lamb|Docherty|2006|p=77}}

Some parties did not want to be a part of the resurrected Second International (ISC) or Comintern. They formed the [[International Working Union of Socialist Parties]] (IWUSP, also known as Vienna International, Vienna Union, or Two-and-a-Half International) on 27 February 1921 at a conference in [[Vienna]].{{sfn|Lamb|Docherty|2006|p=177}} The ISC and the IWUSP joined to form the [[Labour and Socialist International]] (LSI) in May 1923 at a meeting in [[Hamburg]].{{sfn|Lamb|Docherty|2006|p=197}} The rise of [[Nazism]] and the start of [[World War II]] led to the dissolution of the LSI in 1940.

===Socialist International (1951–present)===
The Socialist International was formed in [[Frankfurt]] in July 1951 as a successor to the LSI.{{sfn|Lamb|Docherty|2006|p=320}}

During the post-[[World War II]] period, the SI aided social democratic parties in re-establishing themselves when dictatorship gave way to democracy in [[Carnation Revolution|Portugal (1974)]] and [[Spanish transition to democracy|Spain (1975)]]. Until its 1976 Geneva Congress, the SI had few members outside Europe and no formal involvement with [[Latin America]].<ref>The Dictionary of Contemporary Politics of South America, Routledge, 1989</ref> In the 1980s, most SI parties gave their backing to the [[Sandinista National Liberation Front|Nicaraguan Sandinistas]] (FSLN), whose democratically elected [[Left-wing politics|left-wing]] government was subject to a campaign to overthrow it backed by the [[United States]], which culminated in the [[Iran–Contra affair]] after the [[Presidency of Ronald Reagan|Reagan administration]] covertly continued US support for the [[Contras]] after such support was banned by [[United States Congress|Congress]].
[[File:WillyBrandtBerntCarlssonPenttiVäänänen.jpg|thumb|[[Willy Brandt]] with outgoing secretary general [[Bernt Carlsson]] (left) and new secretary general [[Pentti Väänänen]] (right) at the Socialist International Congress in 1983]]
In the late 1970s and in the 1980s the SI had extensive contacts and discussion with the two leading powers of the [[Cold War]] period, the [[United States]] and the [[Soviet Union]], on issues concerning East–West relations and arms control. The SI supported [[détente]] and disarmament agreements, such as [[Strategic Arms Limitation Talks|SALT]] II, [[START I|START]] and [[Intermediate-Range Nuclear Forces Treaty|INF]]. They had several meetings and discussion in [[Washington, D.C.]], with [[President of the United States|President]] [[Jimmy Carter]] and [[Vice President of the United States|Vice President]] [[George H. W. Bush|George Bush]] and in [[Moscow]] with [[General Secretary of the Communist Party of the Soviet Union|Secretaries General]] [[Leonid Brezhnev]] and [[Mikhail Gorbachev]]. The SI's delegations to these discussions were led by the [[Prime Minister of Finland|Finnish Prime Minister]] [[Kalevi Sorsa]].<ref>{{cite book|last=Väänänen|first=Pentti|year=2012|title=Purppuraruusu ja samettinyrkki|edition=1st|language=fi|publisher=Kellastupa|pages=192–194|isbn=9789525787115}}</ref>

Since then, the SI has admitted as members an increasing number of parties and organisations from Africa, Asia, Europe, and Latin America (see below for current list).

Following the [[Tunisian Revolution]], the [[Democratic Constitutional Rally|Constitutional Democratic Rally]] was expelled from the SI in January 2011;<ref name=SI170111/> later that month the [[Egypt]]ian [[National Democratic Party (Egypt)|National Democratic Party]] was also expelled;<ref>{{Cite news|url=https://foreignpolicy.com/2011/02/03/socialist-international-finally-kicks-out-mubarak/|title=Socialist International finally kicks out Mubarak|journal=Foreign Policy|language=en|date=3 February 2011|access-date=31 December 2022}}</ref> and as a result of the [[2010–2011 Ivorian crisis]], the [[Ivorian Popular Front]] was expelled in March 2011,<ref name=SI190311/> in accordance with section 7.1 of the statutes of the Socialist International. These decisions were approved at the subsequent SI Congress in Cape Town in 2012 in line with section 5.1.3 of the statutes.<ref>{{Cite web|url=https://www.socialistinternational.org/about-us/statutes/|title=Statutes|website=Socialist International|language=en|access-date=3 May 2019}}</ref> These were long term ruling parties of one-party states that were overthrown in the protests of the [[Arab Spring]].

===Progressive Alliance split (2013)===
On 22 May 2013 the [[Social Democratic Party of Germany]] along with some other current and former member parties of the SI founded a rival international network of social-democratic parties known as the [[Progressive Alliance]], citing the perceived undemocratic and outmoded nature of the SI,<ref>[http://www.sueddeutsche.de/politik/streit-zwischen-spd-und-sozialistischer-internationale-bruderzwist-unter-sozialisten-1.1678352 Bruderzwist unter Sozialisten - Politik - Süddeutsche.de]. Sueddeutsche.de. Retrieved on 15 July 2013.</ref><ref>[http://www.spiegel.de/politik/deutschland/progressive-alliance-sozialdemokraten-gruenden-weltweites-netzwerk-a-901352.html Progressive Alliance: Sozialdemokraten gründen weltweites Netzwerk - SPIEGEL ONLINE]. Spiegel.de (22 May 2013). Retrieved on 15 July 2013.</ref><ref>[https://www.faz.net/aktuell/politik/sozialdemokratie-progressive-alliance-gegruendet-12191286.html Sozialdemokratie: „Progressive Alliance“ gegründet - Politik]. FAZ. Retrieved on 15 July 2013.</ref><ref>{{in lang|de}} [http://www.n-tv.de/politik/SPD-gruendet-Progressive-Alliance-article10689571.html Sozialistische Internationale hat ausgedient: SPD gründet "Progressive Alliance"]. n-tv.de. Retrieved on 15 July 2013.</ref> as well as the Socialist International's admittance and continuing inclusion of undemocratic political movements into the organization. For example, the SPD objected to the continued presence of the [[Sandinista National Liberation Front]] and the delayed ouster of the [[Tunisia|Tunisian]] [[Democratic Constitutional Rally]] and [[Egypt|Egyptian]] [[National Democratic Party (Egypt)|National Democratic Party]].<ref>{{Cite news|url=http://www.spiegel.de/spiegel/vorab/a-810543.html |title=SPD will Sozialistischer Internationale den Geldhahn zudrehen und den Mitgliedsbeitrag nicht zahlen – SPIEGEL ONLINE|journal=Der Spiegel|date=22 January 2012|access-date=23 May 2013}}</ref><ref>{{cite web |author=Sigmar Gabriel |date=3 February 2011 |title=Gastbeitrag: Keine Kumpanei mit Despoten &#124; Meinung – Frankfurter Rundschau |url=http://www.fr-online.de/meinung/keine-kumpanei-mit-despoten,1472602,7705378.html |url-status=dead |archive-url=https://web.archive.org/web/20150924133228/http://www.fr-online.de/meinung/gastbeitrag-keine-kumpanei-mit-despoten,1472602,7705378.html |archive-date=2015-09-24 |access-date=23 May 2013 |publisher=Fr-online.de |language=de}}</ref>

After the 2012 Congress, the SI underwent major changes as many of the large European parties allowed their membership to lapse &ndash; for example the [[Social Democratic Party of Germany]] (SPD) and the [[Swedish Social Democratic Party]] &ndash; or downgraded their membership to observer status &ndash; for example, the British [[Labour Party (UK)|Labour Party]] and the Norwegian [[Labour Party (Norway)|Labour Party]] (DNA). These parties now concentrate their international links on the Progressive Alliance, with the SI's focus now increasingly being on the global south.

===Relationship with Latin America===
For a long time, the Socialist International remained distant from Latin America, considering the region as a zone of influence of the [[United States]]. For example, it did not denounce the [[1954 Guatemalan coup d'état|coup d'état]] against Socialist President [[Jacobo Árbenz]] in Guatemala in 1954 or the [[Dominican Civil War|invasion of the Dominican Republic by the United States in 1965]]. It was not until the [[1973 Chilean coup d'état]] that "a world we did not know" was discovered, explained Antoine Blanca, a diplomat for the French [[Socialist Party (France)|Socialist Party]]. According to him, solidarity with the Chilean left was "the first challenge worthy of the name, against Washington, of an International which, until then, had done everything to appear subject to American strategy and NATO". Subsequently, notably under the leadership of [[François Mitterrand]], the SI supported the [[Sandinista National Liberation Front|Sandinistas]] in Nicaragua and other movements in El Salvador, Guatemala, and Honduras in their struggle against US-supported dictatorships.<ref name=":0">{{Cite book|title=Les enfants cachés du Général Pinochet. Précis de Coups d'État Modernes et autres tentatives de déstabilisation|publisher=Éditions Don Quichotte|year=2015|pages=613–614}}</ref>

In the 1990s, it was joined by non-socialist parties that took note of the economic power of the European countries governed or to be governed by their partners across the Atlantic and calculated the benefits they could derive from it.{{citation needed|date=April 2020}} During this period, "the Socialist International works in a clientist way; some parties come here to rub shoulders with Europeans as if they were in the upper class," says Porfirio Muñoz Ledo, one of the representatives of the [[Party of the Democratic Revolution]] (Mexico) at the SI. It is home to "the very centrist Argentinean [[Radical Civic Union]] (UCR); the Mexican [[Institutional Revolutionary Party]] (PRI), which was not very democratically in power for seventy years; the [[Colombian Liberal Party]]—under whose governments the left-wing formation [[Patriotic Union (Colombia)|Patriotic Union]] (1986–1990) was exterminated—introduced the neoliberal model (1990–1994) and to which, until 2002, [[Álvaro Uribe]] will belong". In the following decade, many left-wing parties that came to power (in Brazil, Venezuela, Bolivia, Ecuador and El Salvador) preferred to keep their distance from the SI.<ref name=":0"/>

==Logo==
The logo is the [[fist and rose]], based on the 1977 design by [[José María Cruz Novillo]] for the [[Spanish Socialist Workers' Party]], itself a variant of the logo drawn by Marc Bonnet for the French [[Socialist Party (France)|Socialist Party]] in 1969. Variants of the emblem are or were used by several SI member parties.<ref name="Graffica">{{cite news |title=Cruz Novillo JR: "Sería bueno que el PSOE entendiera el valor de preservar el patrimonio de su logo" |url=https://graffica.info/cruz-novillo-jr-seria-bueno-que-el-psoe-entendiera-el-valor-de-preservar-el-patrimonio-de-su-logo/ |access-date=19 September 2022 |work=Gràffica |date=7 September 2022 |language=es}}</ref>

==Presidents, honorary presidents and secretaries general==
===Presidents===
*{{as of|2023}}, there have been a total of 9 Socialist International presidents.
{| class="sortable wikitable"
!<abbr title="Order of presidency">#</abbr>
!Name
!Portrait
!Country
!
! style="text-align:center;" |Presidency
start date
! style="text-align:center;" |Presidency
end date
! style="text-align:center;" |Time in office
|-
|1
|[[Morgan Phillips]] (1902–1963)
|
|{{Flag|United Kingdom}}
|[[Labour Party (UK)|Labour Party]]
|1951
|1957
|6 years
|-
|2
|[[Alsing Andersen]] (1893–1962)
|[[File:Alsing_Andersen.jpg|74x74px]]
|{{Flag|Denmark}}
|[[Social Democrats (Denmark)|Social Democratic Party of Denmark]]
|1957
|1962
|5 years
|-
|3
|[[Erich Ollenhauer]] (1901–1963)
|[[File:Bundesarchiv_Bild_183-21272-0001,_Erich_Ollenhauer.jpg|92x92px]]
|{{Flag|West Germany}}
|[[Social Democratic Party of Germany]]
| colspan="2" |1963
|
|-
|4
|[[Bruno Pittermann]] (1905–1983)
|[[File:Bruno_Pittermann.jpg|89x89px]]
|{{Flag|Austria}}
|[[Social Democratic Party of Austria]]
|1964
|1976
|12 years
|-
|5
|[[Willy Brandt]] (1913–1992)
|[[File:Bundesarchiv_B_145_Bild-F057884-0009,_Willy_Brandt.jpg|91x91px]]
|{{Flag|West Germany}}
|[[Social Democratic Party of Germany]]
|1976
|1992
|16 years
|-
|6
|[[Pierre Mauroy]] (1928–2013)
|[[File:Pierre_Mauroy_1990.jpg|88x88px]]
|{{Flag|France}}
|[[Socialist Party (France)|Socialist Party of France]]
|17 September 1992
|10 November 1999
|{{ayd|1992|9|17|1999|11|10}}
|-
|7
|[[António Guterres]] (born 1949)
|[[File:António_Guterres_crop.jpg|97x97px]]
|{{Flag|Portugal}}
|[[Socialist Party (Portugal)|Socialist Party of Portugal]]
|10 November 1999
|15 June 2005
|{{ayd|1999|11|10|2005|6|15}}
|-
|8
|[[George Papandreou]]<br>(born 1952)
|[[File:George Papandreou (junior).jpg|83x83px]]
|{{Flag|Greece}}
|[[PASOK]] / [[Movement of Democratic Socialists|KIDISO]]
|30 January 2006
|25 November 2022
|{{ayd|2006|1|30|2022|11|26}}
|-
|9
|[[Pedro Sánchez]]<br>(born 1972)
|[[File:Pedro Sánchez in 2022.jpg|83x83px]]
|{{Flag|Spain}}
|[[Spanish Socialist Workers' Party]]
|25 November 2022
|''Incumbent''
|{{ayd|2022|11|26}}
|}

===Honorary presidents===
Current and honorary presidents include:<ref>{{cite web|title=Honorary Presidents of the Socialist International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=1951|publisher=Socialist International}}</ref>
*[[Mustapha Ben Jafar]], Tunisia
*[[Leonel Brizola]], Brazil
*[[Rubén Berríos]], Puerto Rico
*[[Philippe Busquin]], Belgium
*[[Cuauhtémoc Cárdenas]], Mexico
*[[Mohamed El Yazghi]], Morocco
*[[Alan García]], Peru
*[[Anita Gradin]], Sweden
*[[Elazar Granot]], Israel
*[[Tarja Halonen]], Finland
*[[Mahamadou Issoufou]], Niger
*[[Anker Jørgensen]], Denmark
*[[Lionel Jospin]], France
*[[Neil Kinnock]], United Kingdom
*[[Horacio Serpa]], Colombia
*[[Enrique Silva Cimma]], Chile
*[[Mário Soares]], Portugal
*[[Hans-Jochen Vogel]], Germany

===Secretaries general===
*[[Julius Braunthal]], Austria (1951–1956)
*Bjarne Braatoy, Norway (1956–1957)
*Albert Carthy, United Kingdom (1957–1969)
*[[Hans Janitschek]], Austria (1969–1976)
*[[Bernt Carlsson]], Sweden (1976–1983)
*[[Pentti Väänänen]], Finland (1983–1989)
*[[Luis Ayala (politician)|Luis Ayala]], Chile (1989–2022)
*[[Benedicta Lasi]], Ghana (since 2022)

== Summits ==
* 1951 (Ist): [[Frankfurt]], West Germany.
* 1952 (IInd): [[Milan]], Italy.
* 1953 (IIIrd): [[Stockholm]], Sweden.
* 1955 (IVth): [[London]], United Kingdom.
* 1957 (Vth): [[Vienna]], Austria.
* 1959 (VIth): [[Hamburg]], West Germany.
* 1961 (VIIth): [[Rome]], Italy.
* 1963 (VIIIth): [[Amsterdam]], Netherlands.
* 1964 (IXth): [[Brussels]], Belgium.
* 1966 (Xth): [[Stockholm]], Sweden.
* 1969 (XIth): [[Eastbourne]], United Kingdom.
* 1972 (XIIth): [[Vienna]], Austria (2nd time).
* 1976 (XIIIth): [[Geneva]], Switzerland.
* 1978 (XIVth): [[Vancouver]], Canada.
* 1980 (XVth): [[Madrid]], Spain.
* 1983 (XVIth): [[Albufeira]], Portugal.
* 1986 (XVIIth): [[Lima]], Peru.
* 1989 (XVIIIth): [[Stockholm]], Sweden (2nd time).
* 1992 (XIXth): [[Berlin]], Germany.
* 1996 (XXth): [[New York City]], United States.
* 1999 (XXIst): [[Paris]], France.
* 2003 (XXIInd): [[São Paulo]], Brazil.
* 2008 (XXIIIrd): [[Athens]], Greece.
* 2012 (XXIVth): [[Cape Town]], South Africa.
* 2017 (XXVth): [[Cartagena, Colombia|Cartagena]], Colombia.
* 2022 (XXVIth): [[Madrid]], Spain (2nd time).

==Members==

===Full members===
There are 92 full members:<ref name=members>{{cite web|title=Member Parties|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=931|publisher=Socialist International}}</ref><ref name=broadleft>{{cite web|title=Social Democratic Parties|url=http://www.broadleft.org/socdem.htm|publisher=Broad Left|date=1 June 2005|access-date=14 July 2012|archive-date=30 May 2013|archive-url=https://web.archive.org/web/20130530221635/http://www.broadleft.org/socdem.htm|url-status=dead}}</ref>
{|class="wikitable sortable" style="text-align:left; font-size:95%"
|-
! style="background:#d82628; color:#fff;"|Country
! style="background:#d82628; color:#fff;"|Name
! style="background:#d82628; color:#fff;"|Abbr
! style="background:#d82628; color:#fff;"|Government
! style="background:#d82628; color:#fff; width:750px;"|Notes
! style="background:#d82628; color:#fff;"|Lower House
! style="background:#d82628; color:#fff;"|Upper House
|-
 || {{ALB}} || [[Socialist Party of Albania]]<ref>{{cite web|title=Key Political Parties in Albania|date=27 September 2010|url=http://www.balkaninsight.com/en/article/who-is-who-political-parties-in-albania|publisher=[[Balkan Insight]]}}</ref><ref>{{cite web|title=Albania|url=http://www.europeanforum.net/country/albania|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120805233955/http://www.europeanforum.net/country/albania|archive-date=5 August 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=323}} || PS || {{yes2}} [[2021 Albanian parliamentary election|in government]] || Admitted as consultative member in 1999.<ref name=xxi>{{cite web|title=XXI Congress of the Socialist International, Paris - Decisions of the Congress Regarding Membership|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=59|publisher=Socialist International}}</ref>{{sfn|Lamb|Docherty|2006|p=323}} Promoted to full member in 2003.<ref name=xxii>{{cite web|title=XXII Congress of the Socialist International, São Paulo - Decisions of the Congress Regarding Membership|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=66|publisher=Socialist International}}</ref>
| colspan="2" |{{Composition bar|74|140|{{party color|Socialist Party of Albania}}|per=1}}
|-
 || {{ALG}} || [[Socialist Forces Front]]<ref>{{cite web|title=FFS (Socialist Forces Front)|url=http://www.medea.be/en/countries/algeria/ffs-socialist-forces-front/|publisher=European Institute for Research on Euro-Arab Co-operation|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120510011449/http://www.medea.be/en/countries/algeria/ffs-socialist-forces-front/|archive-date=10 May 2012|url-status=dead}}</ref><ref>{{cite web|title=Algeria|url=http://www.europeanforum.net/country/algeria|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20140124224939/http://www.europeanforum.net/country/algeria|archive-date=24 January 2014}}</ref>{{sfn|Lamb|Docherty|2006|p=319}} || FFS || {{no2}} [[2021 Algerian parliamentary election|in opposition]] || Admitted as consultative member in 1992.<ref name=xix>{{cite web|title=XIX Congress of the Socialist International, Berlin - Decisions on Membership of the Socialist International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=16|publisher=Socialist International}}</ref> Promoted to full member in 1996.<ref name=xx>{{cite web|title=XX Congress of the Socialist International, New York - Congress Decisions Regarding Membership|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=54|publisher=Socialist International}}</ref>{{sfn|Lamb|Docherty|2006|p=319}}
|{{Composition bar|0|407|{{party color|Socialist Forces Front}}|per=1}}
|{{Composition bar|4|144|{{party color|Socialist Forces Front}}|per=1}}
|-
 || {{AND}} || [[Social Democratic Party (Andorra)|Social Democratic Party]]<ref>{{cite web|title=Benvinguts|url=http://www.partitsocialdemocrata.com/?page_id=8|publisher=[[Social Democratic Party (Andorra)]]|language=ca|access-date=14 July 2012|archive-date=24 September 2015|archive-url=https://web.archive.org/web/20150924064702/http://www.partitsocialdemocrata.com/?page_id=8|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=311}} || PS || {{no2}} [[2023 Andorran parliamentary election|in opposition]] || Promoted to full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=311}}
| colspan="2" |{{Composition bar|3|28|{{party color|Social Democratic Party (Andorra)}}|per=1}}
|-
 || {{AGO}} || [[MPLA|Popular Movement for the Liberation of Angola]]{{sfn|Lamb|Docherty|2006|p=270}} || MPLA || {{yes2}} [[2022 Angolan general election|in government]] || Admitted as observer member in 1996.<ref name=xx/> Promoted to full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=270}}
| colspan="2" |{{Composition bar|124|220|{{party color|MPLA}}|per=1}}
|-
 || {{ARG}} || [[Radical Civic Union]]{{sfn|Lamb|Docherty|2006|p=286}} || UCR || {{no2}} [[2023 Argentine general election|in opposition]] || Admitted as consultative member in 1996.<ref name=xx/> Promoted to full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=286}}
|{{Composition bar|34|257|{{party color|Radical Civic Union}}|per=1}}
|{{Composition bar|13|72|{{party color|Radical Civic Union}}|per=1}}
|-
|| {{ARM}} || [[Armenian Revolutionary Federation]]<ref>{{cite web|title=In the Socialist International|url=http://www.arfd.info/the-arf-d-and-the-socialist-international/|publisher=[[Armenian Revolutionary Federation]]|date=22 December 2009|access-date=14 July 2012|archive-date=29 August 2018|archive-url=https://web.archive.org/web/20180829092532/http://www.arfd.info/the-arf-d-and-the-socialist-international/|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=37}} || ARF || {{no2}} [[2021 Armenian parliamentary election|in opposition]] || Admitted (as Armenian Socialist Party) as observer member in 1996.<ref name=xx/>{{sfn|Lamb|Docherty|2006|p=37}} Promoted (as ASP) to consultative member in 1999.<ref name=xxi/> Promoted (as ASP) to full member in 2003.<ref name=xxii/>
| colspan="2" |{{Composition bar|10|107|{{party color|Armenian Revolutionary Federation}}|per=1}}
|-
 || {{BLR}} || [[Belarusian Social Democratic Party (People's Assembly)|Belarusian Social Democratic Party]] || BSDP || {{no2|}} [[2019 Belarusian parliamentary election|extra-parliamentary]] || Admitted as observer member in 1999.<ref name=xxi/> Promoted to consultative member in 2003.<ref name=xxii/> Promoted to full member in November 2015.<ref name=November2015>{{cite web |title=Meeting of the SI Council in Luanda, Angola 27-28 November 2015|url=http://www.socialistinternational.org/councils.cfm|publisher=Socialist International}}</ref> Officially deregistered in Belarus since 2005. 
|{{Composition bar|0|110|{{party color|Belarusian Social Democratic Party (People's Assembly)}}|per=1}}
|{{Composition bar|0|64|{{party color|Belarusian Social Democratic Party (People's Assembly)}}|per=1}}
|-
 || {{BEL}} || [[Socialist Party (Belgium)|Socialist Party]]<ref>{{cite web|title=L'Action Internationale|url=http://www.ps.be/Pagetype1/PS/Liens-utiles/L-Action-Internationale.aspx|publisher=[[Socialist Party (Belgium)]]|language=fr|access-date=14 July 2012|archive-date=7 November 2017|archive-url=https://web.archive.org/web/20171107200010/http://www.ps.be/Pagetype1/PS/Liens-utiles/L-Action-Internationale.aspx|url-status=dead}}</ref> || PS || {{partial|[[2019 Belgian federal election|junior party in coalition]]}} || 
|{{Composition bar|20|150|{{party color|Socialist Party (Belgium)}}|per=1}}
|{{Composition bar|7|60|{{party color|Socialist Party (Belgium)}}|per=1}}
|-
 || {{BOL}} || [[National Unity Front]] || UN || {{no2|}} [[2020 Bolivian general election|extra-parliamentary]] || Promoted to full member in March 2017.
|{{Composition bar|0|130|{{party color|National Unity Front}}|per=1}}
|{{Composition bar|0|36|{{party color|National Unity Front}}|per=1}}
|-
 || {{BIH}} || [[Social Democratic Party (Bosnia and Herzegovina)|Social Democratic Party of Bosnia and Herzegovina]]<ref>{{cite web|title=Bosnia Herzegovina|url=http://www.europeanforum.net/country/bosnia_herzegovina|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20150909220050/http://www.europeanforum.net/country/bosnia_herzegovina|archive-date=9 September 2015}}</ref>{{sfn|Lamb|Docherty|2006|p=311}} || SDP BiH || {{yes2|}} [[2022 Bosnian general election|in government]] || Admitted as observer member in 1996.<ref name=xx/> Promoted to full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=311}}<br />
|{{Composition bar|6|42|{{party color|Social Democratic Party (Bosnia and Herzegovina)}}|per=1}}
|{{Composition bar|0|15|{{party color|Social Democratic Party (Bosnia and Herzegovina)}}|per=1}}
|-
 || {{BRA}} || [[Democratic Labour Party (Brazil)|Democratic Labour Party]]{{sfn|Lamb|Docherty|2006|p=101}} || PDT || {{yes2}} [[2022 Brazilian general election|in government]]|| Admitted as consultative member in 1986.<ref name=xvii>{{cite web |title=XVII Congress of the Socialist International, Lima - Decisions on Membership of the Socialist International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=79&ArticlePageID=26&ModuleID=18|publisher=Socialist International}}</ref>{{sfn|Lamb|Docherty|2006|p=101}} Promoted to full member in 1989.{{sfn|Lamb|Docherty|2006|p=101}}<ref name=xviii>{{cite web |title=XVIII Congress of the Socialist International, Stockholm - Decisions on Membership of the Socialist International|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=34|publisher=Socialist International}}</ref>
|{{Composition bar|18|513|{{party color|Democratic Labour Party (Brazil)}}|per=1}}
|{{Composition bar|2|81|{{party color|Democratic Labour Party (Brazil)}}|per=1}}
|-
 | rowspan="2"| {{BUL}} || [[Party of Bulgarian Social Democrats]]{{sfn|Lamb|Docherty|2006|p=67}} || PBSD || {{no2}} [[2023 Bulgarian parliamentary election|extra-parliamentary]]
|
| colspan="2" |{{Composition bar|0|240|{{party color|Party of Bulgarian Social Democrats}}|per=1}}
|-
| [[Bulgarian Socialist Party]]{{sfn|Lamb|Docherty|2006|p=68}} || BSP || {{no2}} [[2023 Bulgarian parliamentary election|in opposition]] || Admitted as full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=68}} 
| colspan="2" |{{Composition bar|18|240|{{party color|Bulgarian Socialist Party }}|per=1}}
|-
 || {{BFA}} || [[People's Movement for Progress]] || MPP || {{no2}} [[January 2022 Burkina Faso coup d'état|extra-parliamentary]] || Admitted as full member in 2016.<ref name="SI Member Parties in Government">{{cite web |date=18 March 2019 |title=SI Member Parties in Government |url=https://www.socialistinternational.org/news/statements/si-member-parties-in-government-333/ |access-date=9 June 2019 |website=www.socialistinternational.org |publisher=Socialist International}}</ref>
| colspan="2" |{{Composition bar|0|127|{{party color|People's Movement for Progress}}|per=1}}
|-
 || {{CMR}} || [[Social Democratic Front (Cameroon)|Social Democratic Front]]{{sfn|Lamb|Docherty|2006|p=307}} || SDF || {{no2}} [[2020 Cameroonian parliamentary election|in opposition]] || Admitted as consultative member in 1996.<ref name=xx/> Promoted to full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=307}}
|{{Composition bar|5|180|{{party color|Social Democratic Front (Cameroon)}}|per=1}}
|{{Composition bar|1|100|{{party color|Social Democratic Front (Cameroon)}}|per=1}}
|-
 || {{CPV}} || [[African Party for the Independence of Cape Verde]]{{sfn|Lamb|Docherty|2006|p=25}} || PAICV || {{no2}} [[2021 Cape Verdean parliamentary election|in opposition]] || Admitted as consultative member in 1992.<ref name=xix/> Promoted to full member in 1996.<ref name=xx/>{{sfn|Lamb|Docherty|2006|p=25}}
| colspan="2" |{{Composition bar|30|72|{{party color|African Party for the Independence of Cape Verde}}|per=1}}
|-
|{{CAF}}
|[[Movement for the Liberation of the Central African People]]
|MLPC|| {{no2}} [[2020–21 Central African general election|in opposition]] 
|Admitted as observer member in 2008.<ref name="xxiii" /> Upgraded to full member in 2018.
| colspan="2" |{{Composition bar|9|100|{{party color|Movement for the Liberation of the Central African People}}|per=1}}
|-
|{{flagcountry|Chad}}
|[[National Union for Democracy and Renewal]]
|UNDR|| {{no2}} [[Transitional Military Council (Chad)|extra-parliamentary]] 
|Admitted as observer member in June/July 2014.<ref name="JuneJuly2014SICouncil" /> Upgraded to full member in 2017. 
| colspan="2" |{{Composition bar|0|155|{{party color|National Union for Democracy and Renewal}}|per=1}}
|-
 | rowspan="3"| {{CHL}} || [[Party for Democracy (Chile)|Party for Democracy]]{{sfn|Lamb|Docherty|2006|p=265}} || PPD || {{partial|[[2021 Chilean general election|junior party in coalition]]}} || Admitted as consultative member in 1992.<ref name=xix/> Promoted to full member in 1996.<ref name=xx/>{{sfn|Lamb|Docherty|2006|p=265}} 
|{{Composition bar|7|155|{{party color|Party for Democracy (Chile)}}|per=1}}
|{{Composition bar|6|50|{{party color|Party for Democracy (Chile)}}|per=1}}
|-
| [[Radical Party of Chile (2018)|Radical Party of Chile]]{{sfn|Lamb|Docherty|2006|p=314}} || PRSD || {{partial|[[2021 Chilean general election|junior party in coalition]]}} || 
|{{Composition bar|4|155|{{party color|Radical Party of Chile (2018)}}|per=1}}
|{{Composition bar|0|50|{{party color|Radical Party of Chile (2018)}}|per=1}}
|-
| [[Socialist Party of Chile]]{{sfn|Lamb|Docherty|2006|p=325}} || PS || {{partial|[[2021 Chilean general election|junior party in coalition]]}} || Admitted as consultative member in 1992.<ref name=xix/> Promoted to full member in 1996.<ref name=xx/>{{sfn|Lamb|Docherty|2006|p=325}} 
|{{Composition bar|13|155|{{party color|Socialist Party of Chile}}|per=1}}
|{{Composition bar|7|50|{{party color|Radical Party of Chile (2018)}}|per=1}}
|-
 || {{COL}} || [[Colombian Liberal Party]]{{sfn|Lamb|Docherty|2006|p=211}} || PLC || {{partial|}} [[2022 Colombian parliamentary election|junior party in coalition]] || Admitted as consultative member in 1992.<ref name=xix/> Promoted to full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=211}}
|{{Composition bar|32|188|{{party color|Colombian Liberal Party}}|per=1}}
|{{Composition bar|14|108|{{party color|Colombian Liberal Party}}|per=1}}
|-
 || {{CRI}} || [[National Liberation Party (Costa Rica)|National Liberation Party]]{{sfn|Lamb|Docherty|2006|p=245}} || PLN || {{no2}} [[2022 Costa Rican general election|in opposition]] || Full member since 1987.{{sfn|Lamb|Docherty|2006|p=245}}
| colspan="2" |{{Composition bar|19|57|{{party color|National Liberation Party (Costa Rica)}}|per=1}}
|-
 || {{CRO}} || [[Social Democratic Party of Croatia]]<ref>{{cite web|title=Croatia|url=http://www.europeanforum.net/country/croatia|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120615140100/http://www.europeanforum.net/country/croatia|archive-date=15 June 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=312}} || SDP || {{no2}} [[2020 Croatian parliamentary election|in opposition]] || Admitted as full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=312}}
| colspan="2" |{{Composition bar|37|151|{{party color|Social Democratic Party of Croatia}}|per=1}}
|-
 || {{CYP}} || [[EDEK Socialist Party]]<ref>{{cite web|title=Movement for Social Democracy|url=http://www.edek.org.cy/|publisher=[[Movement for Social Democracy]]}}</ref>{{sfn|Lamb|Docherty|2006|p=308}} || EDEK || {{partial| [[2023 Cypriot presidential election|junior party in coalition]]}} || Full member since 1987.{{sfn|Lamb|Docherty|2006|p=308}} Promoted to full member in 1992.<ref name=xix/>
| colspan="2" |{{Composition bar|3|56|{{party color|Movement for Social Democracy}}|per=1}}
|-
 | rowspan="2"| {{flagicon|Cyprus}} {{flagicon|TRNC}} [[Cyprus]] ([[Northern Cyprus|North]])|| [[Republican Turkish Party]] || CTP || {{no2}} [[2022 Northern Cypriot parliamentary election|in opposition]] || Admitted as consultative member in 2008 (pending consultation).<ref name=xxiii/> Promoted to full member in June/July 2014.<ref name=JuneJuly2014SICouncil>{{cite web|title=SI Council Meeting in Mexico City|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=2299|publisher=Socialist International}}</ref>
| colspan="2" |{{Composition bar|18|50|{{party color|Republican Turkish Party}}|per=1}}
|-
| [[Communal Democracy Party]] || TDP || {{no2}} [[2022 Northern Cypriot parliamentary election|extra-parliamentary]] || Admitted as consultative member in November 2015.<ref name=November2015/> Promoted to full member in March 2017.
| colspan="2" |{{Composition bar|0|50|{{party color|Communal Democracy Party}}|per=1}}
|-
 || {{CZE}} || [[Social Democracy (Czech Republic)|Social Democracy]]<ref>{{cite web|title=Our Party|url=http://www.cssd.cz/en/our-party/|publisher=[[Czech Social Democratic Party]]|url-status=dead|archive-url=https://web.archive.org/web/20120813071430/http://www.cssd.cz/en/our-party/|archive-date=13 August 2012}}</ref>{{sfn|Lamb|Docherty|2006|p=95}} || SOCDEM || {{no2|}}[[2021 Czech legislative election|in opposition]] ||
|{{Composition bar|0|200|{{party color|Social Democracy (Czech Republic)}}|per=1}}
|{{Composition bar|1|81|{{party color|Social Democracy (Czech Republic)}}|per=1}}
|-
|{{COD}}
|[[Union for Democracy and Social Progress (Democratic Republic of the Congo)|Union for Democracy and Social Progress]]
|UDPS|| {{yes2}} [[2018 Democratic Republic of the Congo general election|in government]] 
|Admitted as observer member in 2003.<ref name="xxii" />
|{{Composition bar|32|500|{{party color|Union for Democracy and Social Progress (Democratic Republic of the Congo)}}|per=1}}
|{{Composition bar|0|108|{{party color|Union for Democracy and Social Progress (Democratic Republic of the Congo)}}|per=1}}
|-
 || {{DOM}} || [[Dominican Revolutionary Party]]{{sfn|Lamb|Docherty|2006|p=108}} || PRD || {{no2}} [[2020 Dominican Republic general election|in opposition]] || Full member since 1987.{{sfn|Lamb|Docherty|2006|p=108}}
|{{Composition bar|4|190|{{party color|Dominican Revolutionary Party}}|per=1}}
|{{Composition bar|0|32|{{party color|Dominican Revolutionary Party}}|per=1}}
|-
 || {{EQG}} || [[Convergence for Social Democracy (Equatorial Guinea)|Convergence for Social Democracy]]{{sfn|Lamb|Docherty|2006|p=87}} || CPDS || {{no2}} [[2022 Equatorial Guinean general election|extra-parliamentary]] || Admitted as consultative member in 1996.<ref name=xx/> Promoted to full member in 1999.<ref name=xxi/>{{sfn|Lamb|Docherty|2006|p=87}}
| colspan="2" |{{Composition bar|0|100|{{party color|Convergence for Social Democracy (Equatorial Guinea)}}|per=1}}
|-
 || {{FIN}} || [[Social Democratic Party of Finland]] || SDP || {{no2}} [[2023 Finnish parliamentary election|in opposition]] ||
| colspan="2" |{{Composition bar|43|200|{{party color|Social Democratic Party of Finland}}|per=1}}
|-
 || {{FRA}} || [[Socialist Party (France)|Socialist Party]]<ref>{{cite web|title=L'internationale socialiste|url=http://www.parti-socialiste.fr/le-reseau-ps/internationale-socialiste|publisher=[[Socialist Party (France)]]|language=fr|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120608044917/http://www.parti-socialiste.fr/le-reseau-ps/internationale-socialiste|archive-date=8 June 2012|url-status=dead}}</ref> || PS || {{no2}} [[2024 French legislative election|in opposition]] ||
|{{Composition bar|63|577|{{party color|Socialist Party (France)}}|per=1}}
|{{Composition bar|66|348|{{party color|Socialist Party (France)}}|per=1}}
|-
 || {{GHA}} || [[National Democratic Congress (Ghana)|National Democratic Congress]] || NDC || {{no2}} [[2020 Ghanaian general election|in opposition]] || Admitted as consultative member in 2003.<ref name=xxii/> Promoted to full member in 2008.<ref name=xxiii>{{cite web |title=XXIII Congress of the Socialist International, Athens - Decisions of the Congress Regarding Membership|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=1270|publisher=Socialist International}}</ref>
| colspan="2" |{{Composition bar|137|275|{{party color|National Democratic Congress (Ghana)}}|per=1}}
|-
 || {{GRE}} || [[PASOK – Movement for Change]] || PASOK-KINAL || {{no2}} [[May 2023 Greek legislative election|in opposition]] || Full member since 1990.{{sfn|Lamb|Docherty|2006|p=262}}
| colspan="2" |{{Composition bar|32|300|{{party color|PASOK – Movement for Change}}|per=1}}
|-
 || {{GUA}} || [[National Unity of Hope]] || UNE || {{no2}} [[2023 Guatemalan general election|in opposition]] || Admitted as full member in 2008.<ref name=xxiii/>
| colspan="2" |{{Composition bar|28|160|{{party color|National Unity of Hope}}|per=1}}
|-
 || {{GUI}} || [[Rally of the Guinean People]]<ref>{{cite web |title=Attack on President Condé an assault on democracy|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=2127|publisher=Socialist International|date=19 July 2011}}</ref>{{sfn|Lamb|Docherty|2006|p=148}} || RPG || {{no2}} [[2021 Guinean coup d'état|in opposition]] || Admitted (as Guinean People's Assembly) as consultative member in 1999.<ref name=xxi/> Promoted (as GPA) to full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=148}} 
| colspan="2" |{{Composition bar|1|81|{{party color|Rally of the Guinean People}}|per=1}}
|-
 | rowspan="2"| {{HAI}} || [[Fusion of Haitian Social Democrats]]{{sfn|Lamb|Docherty|2006|p=351}} || PFSDH || {{no2}} [[List of current members of the Parliament of Haiti|extra-parliamentary]] || Full member since 1989.{{sfn|Lamb|Docherty|2006|p=351}}
|{{Composition bar|0|119|{{party color|Fusion of Haitian Social Democrats}}|per=1}}
|{{Composition bar|0|30|{{party color|Fusion of Haitian Social Democrats}}|per=1}}
|-
|Social Democratic Assembly for the Progress of Haiti (RSD)
|RSD|| {{no2}} [[List of current members of the Parliament of Haiti|extra-parliamentary]] 
|Admitted as full members in 2018<ref>{{Cite web|url=https://www.socialistinternational.org/councils/meeting-of-the-si-council-at-the-united-nations-in-geneva/|title=Meeting of the SI Council at the United Nations in Geneva|website=Socialist International|language=en|access-date=3 May 2019}}</ref>
|{{Composition bar|0|119|{{party color|Fusion of Haitian Social Democrats}}|per=1}}
|{{Composition bar|0|30|{{party color|Fusion of Haitian Social Democrats}}|per=1}}
|-
 || {{HUN}} || [[Hungarian Socialist Party]]<ref>{{cite web|title=A Magyar Szocialista Párt…|url=http://mszp.hu/bemutatkozas|publisher=[[Hungarian Socialist Party]]|language=hu|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120630105915/http://mszp.hu/bemutatkozas|archive-date=30 June 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=158}} || MSzP || {{no2}} [[2022 Hungarian parliamentary election|in opposition]] || Admitted as observer member in 1992.<ref name=xix/>{{sfn|Lamb|Docherty|2006|p=158}} Promoted to full member in 1996.<ref name=xx/>
| colspan="2" |{{Composition bar|10|199|{{party color|Hungarian Socialist Party}}|per=1}}
|-
|| {{IND}} || [[Indian National Congress]] || INC || {{no2}} [[2024 Indian general election|in opposition]] || Originally joined in 1993.<ref name="Sheffer1993">{{cite book |author=Gabriel Sheffer|title=Innovative Leaders in International Politics|url=https://books.google.com/books?id=__efKLSD3M0C&pg=PA202|access-date=30 January 2013|year=1993|publisher=SUNY Press|isbn=978-0-7914-1520-7|page=202}}</ref> Readmitted as full member December 2014.<ref name=December2014SICouncil>{{cite web|title=Meeting of the SI Council at the United Nations in Geneva|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=2326|publisher=Socialist International}}</ref>
|{{Composition bar|99|543|{{party color|Indian National Congress}}|per=1}}
|{{Composition bar|27|245|{{party color|Indian National Congress}}|per=1}}
|-
 || {{IRQ}} || [[Patriotic Union of Kurdistan]] || PUK || {{partial|}} [[2021 Iraqi parliamentary election|junior party in coalition]] || Admitted as observer member in 2003.<ref name=xxii/> Promoted to full member in 2008.<ref name=xxiii/>
| colspan="2" |{{Composition bar|17|329|{{party color|Patriotic Union of Kurdistan}}|per=1}}
|-
 || {{ISR}} || [[Meretz]]<ref name=israel>{{cite web|title=Israel|url=http://www.europeanforum.net/country/israel|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20150115080802/http://www.europeanforum.net/country/israel|archive-date=15 January 2015}}</ref>{{sfn|Lamb|Docherty|2006|p=308}} || מרצ|| {{no2}} [[2022 Israeli legislative election|extra-parliamentary]] ||
| colspan="2" |{{Composition bar|0|120|{{party color|Meretz}}|per=1}}
|-
 || {{ITA}} || [[Italian Socialist Party (2007)|Italian Socialist Party]] || PSI || {{no2}} [[2022 Italian general election|extra-parliamentary]] ||
|{{Composition bar|0|400|{{party color|Italian Socialist Party (2007)}}|per=1}}
|{{Composition bar|0|200|{{party color|Italian Socialist Party (2007)}}|per=1}}
|-
 || {{JAM}} || [[People's National Party]]{{sfn|Lamb|Docherty|2006|p=271}} || PNP || {{no2}} [[2020 Jamaican general election|in opposition]] || Full member since 1952.{{sfn|Lamb|Docherty|2006|p=271}} Temporarily demoted to observer member in 2012 due to non-payment of membership fees.<ref name=members/>
|{{Composition bar|14|63|{{party color|People's National Party}}|per=1}}
|{{Composition bar|8|21|{{party color|People's National Party}}|per=1}}
|-
 || {{JPN}} || [[Social Democratic Party (Japan)|Social Democratic Party]]{{sfn|Lamb|Docherty|2006|p=186}} || SDP || {{no2}} [[2021 Japanese general election|in opposition]] || Full member since 1951 as the [[Japan Socialist Party]].{{sfn|Lamb|Docherty|2006|p=186}}
|{{Composition bar|1|465|{{party color|Social Democratic Party (Japan)}}|per=1}}
|{{Composition bar|2|248|{{party color|Social Democratic Party (Japan)}}|per=1}}
|-
 || {{KAZ}} || [[Nationwide Social Democratic Party]] || JSDP || {{no2}} [[2023 Kazakh legislative election|in opposition]] || Admitted as consultative member in 2012.<ref name="xxiv" /> Promoted to full member in November 2015.<ref name="November2015" />
| colspan="2" |{{Composition bar|4|98|{{party color|Nationwide Social Democratic Party}}|per=1}}
|-
 || {{flag|Kyrgyzstan}} || [[Social Democrats (Kyrgyzstan)]]|| SDK || {{no2}} [[2021 Kyrgyz parliamentary election|in opposition]] || Legal successor to the Social Democratic Party of Kyrgyzstan.
| colspan="2" |{{Composition bar|1|90|{{party color|Social Democrats (Kyrgyzstan)}}|per=1}}
|-
 || {{LBN}} || [[Progressive Socialist Party]]{{sfn|Lamb|Docherty|2006|p=283}}|| PSP || {{no2}} [[2022 Lebanese general election|in opposition]] || Full member since 1980.{{sfn|Lamb|Docherty|2006|p=283}}
| colspan="2" |{{Composition bar|8|128|{{party color|Progressive Socialist Party}}|per=1}}
|-
 || {{LTU}} || [[Social Democratic Party of Lithuania]]{{sfn|Lamb|Docherty|2006|p=214}}|| LSDP || {{no2|}} [[2020 Lithuanian parliamentary election|in opposition]] || Full member since the 1990s.{{sfn|Lamb|Docherty|2006|p=214}}
| colspan="2" |{{Composition bar|13|141|{{party color|Social Democratic Party of Lithuania}}|per=1}}
|-
|{{LUX}}
|[[Luxembourg Socialist Workers' Party]]<ref>{{cite web|url=http://www.lsap.lu/lsap_Lsap-aujourdhui.124-2.html|title=LSAP aujourd'hui|publisher=[[Luxembourg Socialist Workers' Party]]|language=fr|archive-url=https://web.archive.org/web/20131014013849/http://www.lsap.lu/lsap_Lsap-aujourdhui.124-2.html|archive-date=14 October 2013|url-status=dead|access-date=14 July 2012}}</ref>{{sfn|Lamb|Docherty|2006|p=217}}
|| LSAP/POSL|| {{partial|}} [[2023 Luxembourg general election|in opposition]] || Full member since 1951.{{sfn|Lamb|Docherty|2006|p=217}}
| colspan="2" |{{Composition bar|11|60|{{party color|Luxembourg Socialist Workers' Party}}|per=1}}
|-
 | rowspan="2" | {{MLI}} || [[Alliance for Democracy in Mali]]{{sfn|Lamb|Docherty|2006|p=29}} || ADEMA-PASJ || {{no2|}} [[2021 Malian coup d'état|in opposition]] || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=29}} Promoted to full member in 2008.<ref name="xxiii" /> Status unclear following the [[2020 Malian coup d'état]].
| colspan="2" |{{Composition bar|24|147|{{party color|Alliance for Democracy in Mali}}|per=1}}
|-
| [[Rally for Mali]]|| RPM || {{no2|}} [[2021 Malian coup d'état|in opposition]] || Admitted as consultative member in 2003.<ref name=xxii/> Status unclear following the [[2020 Malian coup d'état]].
| colspan="2" |{{Composition bar|51|147|{{party color|Rally for Mali}}|per=1}}
|-
 || {{MRT}} || [[Rally of Democratic Forces]]|| RFD || {{no2}} [[2023 Mauritanian parliamentary election|extra-parliamentary]] || Admitted as observer member in 2003.<ref name="xxii" /> Promoted to full member in 2008.<ref name="xxiii" />
| colspan="2" |{{Composition bar|0|176|{{party color|Rally of Democratic Forces}}|per=1}}
|-
 | rowspan="2" | {{MUS}} || [[Labour Party (Mauritius)|Labour Party]]{{sfn|Lamb|Docherty|2006|p=230}}|| PT || {{no2}} [[2019 Mauritian general election|in opposition]] || Full member since 1969.{{sfn|Lamb|Docherty|2006|p=230}}
| colspan="2" |{{Composition bar|13|69|{{party color|Labour Party (Mauritius)}}|per=1}}
|-
| [[Mauritian Militant Movement]]{{sfn|Lamb|Docherty|2006|p=229}}|| MMM || {{no2}} [[2019 Mauritian general election|in opposition]] || Admitted as consultative member in 1996.<ref name=xx/> Promoted to full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=229}} Part of the Alliance of the Heart.
| colspan="2" |{{Composition bar|9|69|{{party color|Mauritian Militant Movement}}|per=1}}
|-
 || {{MEX}} || [[Institutional Revolutionary Party]]{{sfn|Lamb|Docherty|2006|p=167}}|| PRI || {{no2}} [[2021 Mexican legislative election|in opposition]] || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=167}}
|{{Composition bar|68|500|{{party color|Institutional Revolutionary Party}}|per=1}}
|{{Composition bar|13|128|{{party color|Institutional Revolutionary Party}}|per=1}}
|-
 || {{MDA}} || [[European Social Democratic Party]]<ref>{{cite web|title=Moldova|url=http://www.europeanforum.net/country/moldova|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20150405153134/http://www.europeanforum.net/country/moldova|archive-date=5 April 2015}}</ref>|| PSDE || {{no2|}} [[2021 Moldovan parliamentary election|extra-parliamentary]] || Admitted as consultative member in 2008.<ref name="xxiii" /> Promoted to full member in 2012.<ref name="xxiv">{{cite web |title=XXIV Congress of the Socialist International, Cape Town - Decisions on Membership|url=http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=1697|publisher=Socialist International}}</ref><br />Part of [[Alliance for European Integration]].
| colspan="2" |{{Composition bar|0|101|{{party color|European Social Democratic Party}}|per=1}}
|-
 || {{MNG}} || [[Mongolian People's Party]]<ref>{{cite web|title=Party History|url=http://mpp.mn/en/page/detail/name/Party+History|publisher=[[Mongolian People's Party]]|access-date=14 July 2012|archive-date=8 September 2018|archive-url=https://web.archive.org/web/20180908015807/http://mpp.mn/en/page/detail/name/Party+History|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=238}}|| MPP || {{yes2}} [[2020 Mongolian legislative election|in government]] || Admitted (as [[Mongolian People's Party|Mongolian People's Revolutionary Party]]) as observer member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=238}}<br />Promoted (as Mongolian People's Revolutionary Party) to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=238}}
| colspan="2" |{{Composition bar|62|76|{{party color|Mongolian People's Party}}|per=1}}
|-
 | rowspan="2" | {{MNE}} || [[Democratic Party of Socialists of Montenegro]]<ref name="montenegro">{{cite web|title=Montenegro|url=http://www.europeanforum.net/country/montenegro|archive-url=https://web.archive.org/web/20050418025741/http://www.europeanforum.net/country/montenegro|url-status=dead|archive-date=18 April 2005|publisher=European Forum for Democracy and Solidarity}}</ref>|| DPS || {{no2}} [[2023 Montenegrin parliamentary election|in opposition]] || Admitted as consultative member in 2003.<ref name="xxii" /> Promoted to full member in 2008.<ref name="xxiii" />
| colspan="2" |{{Composition bar|17|81|{{party color|Democratic Party of Socialists of Montenegro}}|per=1}}
|-
| [[Social Democratic Party of Montenegro]]<ref name="montenegro" /><ref>{{cite web|title=Socijalistička internacionala |url=http://www.sdp.co.me/SocijalistickaInternacionala|publisher=[[Social Democratic Party of Montenegro]]|language=cnr |archive-url=https://web.archive.org/web/20140221171744/http://www.sdp.co.me/SocijalistickaInternacionala |archive-date=21 February 2014}}</ref>{{sfn|Lamb|Docherty|2006|p=313}}|| SDP || {{no2}} [[2023 Montenegrin parliamentary election|extra-parliamentary]] || Admitted as observer member in 1996.<ref name=xx/> Promoted to consultative member in 1999.<ref name=xxi/> Promoted to full member in 2003.<ref name=xxii/>{{sfn|Lamb|Docherty|2006|p=313}}<br />
| colspan="2" |{{Composition bar|0|81|{{party color|Social Democratic Party of Montenegro}}|per=1}}
|-
 || {{MAR}} || [[Socialist Union of Popular Forces]]<ref>{{cite web|title=Relations internationales|url=http://www.usfp.ma/international.php|publisher=[[Socialist Union of Popular Forces]]|language=fr|access-date=14 July 2012|archive-url=https://web.archive.org/web/20121115110938/http://www.usfp.ma/international.php|archive-date=15 November 2012|url-status=dead}}</ref><ref>{{cite web|title=Morocco|url=http://www.europeanforum.net/country/morocco|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20140910053106/http://www.europeanforum.net/country/morocco|archive-date=10 September 2014}}</ref>{{sfn|Lamb|Docherty|2006|p=328}}|| USFP || {{no2}} [[2021 Moroccan general election|in opposition]] || Promoted to full member in 1992.<ref name="xix" />
|{{Composition bar|37|395|{{party color|Socialist Union of Popular Forces}}|per=1}}
|{{Composition bar|8|120|{{party color|Socialist Union of Popular Forces}}|per=1}}
|-
 || {{MOZ}} || [[FRELIMO|Frelimo Party]]{{sfn|Lamb|Docherty|2006|p=132}}|| FRELIMO || {{yes2}} [[2019 Mozambican general election|in government]] || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 1999.<ref name="xxi" />
| colspan="2" |{{Composition bar|184|250|{{party color|FRELIMO}}|per=1}}
|-
 || {{NAM}} || [[SWAPO|South West Africa People's Organisation]]|| SWAPO || {{yes2}} [[2019 Namibian general election|in government]] || Promoted to full member in 2008.<ref name="xxiii" />
|{{Composition bar|63|96|{{party color|SWAPO}}|per=1}}
|{{Composition bar|28|42|{{party color|SWAPO}}|per=1}}
|-
 || {{NEP}} || [[Nepali Congress]]<ref>{{cite web |title=Introduction|url=http://www.nepalicongress.org/index.php?linkId=2|publisher=[[Nepali Congress]]}}</ref>{{sfn|Lamb|Docherty|2006|p=250}}|| NC || {{no2}} [[Dahal cabinet, 2022|in opposition]] || Admitted as consultative member in 1989.<ref name="xviii" /> Promoted to full member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=250}}
|{{Composition bar|88|275|{{party color|Nepali Congress}}|per=1}}
|{{Composition bar|16|59|{{party color|Nepali Congress}}|per=1}}
|-
 || {{NER}} || [[Nigerien Party for Democracy and Socialism]]{{sfn|Lamb|Docherty|2006|p=267}}|| PNDS || {{no2}} [[2023 Nigerien coup d'état|in opposition]] || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=267}} Status unclear following the [[2023 Nigerien coup d'état]].
| colspan="2" |{{Composition bar|79|171|{{party color|Nigerien Party for Democracy and Socialism}}|per=1}}
|-
 || {{PAK}} || [[Pakistan Peoples Party]]{{sfn|Lamb|Docherty|2006|p=267}}|| PPP || {{partial|[[2024 Pakistani general election|junior party in coalition]]}} || Admitted as consultative member in 1989.<ref name="xviii" /> Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=261}}
|{{Composition bar|0|336|{{party color|Pakistan People's Party}}|per=1}}
|{{Composition bar|20|100|{{party color|Pakistan People's Party}}|per=1}}
|-
 || {{flag|Palestine}} || [[Fatah]]<ref>{{cite news|title=Fatah becomes member of Socialist International|url=http://www.maannews.net/eng/ViewDetails.aspx?ID=401555|newspaper=[[Ma'an News Agency]]|date=2 July 2011|access-date=14 July 2012|archive-date=8 January 2015|archive-url=https://web.archive.org/web/20150108232434/http://www.maannews.net/eng/ViewDetails.aspx?ID=401555|url-status=dead}}</ref><ref name="palestine">{{cite web|title=Palestinian Territories|url=http://www.europeanforum.net/country/palestinian_territories|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20090603113808/http://www.europeanforum.net/country/palestinian_territories|archive-date=3 June 2009}}</ref>|| || {{yes2}} [[2005 Palestinian presidential election|in government]] || Admitted as observer member in 1996.<ref name="xx" /> Promoted to consultative member in 1999.<ref name="xxi" /><br />Promoted to full member in 2012.<ref name="xxiv" />
| colspan="2" |{{Composition bar|45|132|{{party color|Fatah}}|per=1}}
|-
 || {{PAN}} || [[Democratic Revolutionary Party]]{{sfn|Lamb|Docherty|2006|p=290}}|| PRD || {{yes2}} [[2019 Panamanian general election|in government]] || Admitted as consultative member in 1986.<ref name="xvii" />{{sfn|Lamb|Docherty|2006|p=290}} Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 2003.<ref name="xxii" />
| colspan="2" |{{Composition bar|35|71|{{party color|Democratic Revolutionary Party}}|per=1}}
|-
 || {{PRY}} || [[Progressive Democratic Party (Paraguay)|Progressive Democratic Party]]|| PDP || {{no2}} [[2023 Paraguayan general election|extra-parliamentary]] || Admitted as consultative member in 2008.<ref name="xxiii" /> Promoted to full member in November 2015.<ref name="November2015" />
|{{Composition bar|0|80|{{party color|Progressive Democratic Party (Paraguay)}}|per=1}}
|{{Composition bar|0|45|{{party color|Progressive Democratic Party (Paraguay)}}|per=1}}
|-
 || {{PER}} || [[Peruvian Aprista Party]]{{sfn|Lamb|Docherty|2006|p=273}}|| PAP || {{no2}} [[2021 Peruvian general election|extra-parliamentary]] || Promoted to full member in 1999.<ref name="xxi" />
| colspan="2" |{{Composition bar|0|130|{{party color|American Popular Revolutionary Alliance}}|per=1}}
|-
|{{PHL}}
|[[Philippine Democratic Socialist Party]]
|PDSP|| {{no2}} [[2022 Philippine House of Representatives elections|extra-parliamentary]] 
|Admitted as consultative member in 1992.<ref name="xix" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014. Reinstated in 2019.
|{{Composition bar|0|316|{{party color|Partido Demokratiko Sosyalista ng Pilipinas}}|per=1}}
|{{Composition bar|0|24|{{party color|Partido Demokratiko Sosyalista ng Pilipinas}}|per=1}}
|-
 || {{PRT}} || [[Socialist Party (Portugal)|Socialist Party]]{{sfn|Lamb|Docherty|2006|p=280}} || PS || {{no2}} [[2024 Portuguese legislative election#Aftermath|in opposition]] ||
| colspan="2" |{{Composition bar|78|230|{{party color|Socialist Party (Portugal)}}|per=1}}
|-
 || {{PUR}} || [[Puerto Rican Independence Party]]{{sfn|Lamb|Docherty|2006|p=285}}|| PIP || {{no2}} [[2020 Puerto Rican general election|in opposition]] || Consultative member in 1987, full member in 1994.{{sfn|Lamb|Docherty|2006|p=285}} Promoted to full member in 1992.<ref name="xix" />
|{{Composition bar|1|51|{{party color|Puerto Rican Independence Party}}|per=1}}
|{{Composition bar|1|27|{{party color|Puerto Rican Independence Party}}|per=1}}
|-
 || {{ROU}} || [[Social Democratic Party (Romania)|Social Democratic Party]]<ref>{{cite web|title=Afiliere internationala|url=http://www.psd.ro/noulpsd/afiliere-internationala|archive-url=https://archive.today/20130416112206/http://www.psd.ro/noulpsd/afiliere-internationala|url-status=dead|archive-date=16 April 2013|publisher=[[Social Democratic Party (Romania)]]|language=ro}}</ref>{{sfn|Lamb|Docherty|2006|p=293}}|| PSD || {{yes2}} [[2020 Romanian parliamentary election|in government]] || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 1999.<ref name="xxi" /> [[Romanian Social Democratic Party (1990–2001)|PSDR]] admitted as consultative member in 1992, full member in 2001.{{sfn|Lamb|Docherty|2006|p=293}} Admitted as full member in 2003.<ref name="xxii" /> Both parties merged into [[Social Democratic Party (Romania)|PSD]] in 2001. 
|{{Composition bar|107|330|{{party color|Social Democratic Party (Romania)}}|per=1}}
|{{Composition bar|49|136|{{party color|Social Democratic Party (Romania)}}|per=1}}
|-
 || {{SMR}} || [[Party of Socialists and Democrats]]{{sfn|Lamb|Docherty|2006|p=267}}|| PSD || {{partial|}} [[2019 Sammarinese general election|junior partner in coalition]] || Consultative member in 1961, full member in 1980.{{sfn|Lamb|Docherty|2006|p=267}}
| colspan="2" |{{Composition bar|4|60|{{party color|Party of Socialists and Democrats}}|per=1}}
|-
 || {{SEN}} || [[Socialist Party of Senegal]]<ref>{{cite web|title=Le Parti en bref|url=http://www.ps-senegal.com/historique/le-parti-en-bref|publisher=[[Socialist Party of Senegal]]|language=fr|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120424204515/http://www.ps-senegal.com/historique/le-parti-en-bref|archive-date=24 April 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=326}}|| PS || {{partial|}} [[2022 Senegalese parliamentary election|junior partner in coalition]] || Full member since the 1970s.{{sfn|Lamb|Docherty|2006|p=326}} Boycotted [[2012 Senegalese parliamentary election|last election]].
| colspan="2" |{{Composition bar|0|150|{{party color|Socialist Party of Senegal}}|per=1}}
|-
 || {{SVK}} || [[Direction – Social Democracy]]{{sfn|Lamb|Docherty|2006|p=107}}|| SMER-SD || {{yes2}} [[2023 Slovak parliamentary election|in government]] || Full member.{{sfn|Lamb|Docherty|2006|p=107}}
| colspan="2" |{{Composition bar|42|150|{{party color|Direction – Social Democracy}}|per=1}}
|-
 || {{ZAF}} || [[African National Congress]]{{sfn|Lamb|Docherty|2006|p=24}}|| ANC || {{yes2}} [[2024 South African general election|in government]] || Admitted as full member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=24}}
|{{Composition bar|159|400|{{party color|African National Congress}}|per=1}}
|{{Composition bar|43|90|{{party color|African National Congress}}|per=1}}
|-
 || {{ESP}} || [[Spanish Socialist Workers' Party]]{{sfn|Lamb|Docherty|2006|p=336}}|| PSOE || {{yes2}} [[2023 Spanish general election|in government]] || Full member since 1951.{{sfn|Lamb|Docherty|2006|p=336}}
|{{Composition bar|121|350|{{party color|Spanish Socialist Workers' Party}}|per=1}}
|{{Composition bar|88|266|{{party color|Spanish Socialist Workers' Party}}|per=1}}
|-
 || {{TUN}} || [[Democratic Forum for Labour and Liberties]]|| FDTL || {{n/a}} || Admitted as consultative member in 2003.<ref name="xxii" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Promoted to full member in 2012.<ref name="xxiv" /> Boycotted the [[2022–23 Tunisian parliamentary election]].<ref>{{Cite web |date=2022-09-19 |title=Tunisie : Une coalition politique annonce son boycott des prochaines législatives |url=https://news.gnet.tn/tunisie-une-nouvelle-coalition-politique-annonce-son-boycott-des-prochaines-legislatives/ |access-date=2023-12-30 |website=Gnet news |language=fr-FR}}</ref>
| colspan="2" |{{Composition bar|0|217|{{party color|Democratic Forum for Labour and Liberties}}|per=1}}
|-
 || {{TUR}} || [[Republican People's Party]]<ref>{{cite web |title=European Union Representation|url=http://chpbrussels.org/|publisher=[[Republican People's Party]]}}</ref><ref>{{cite web|title=Turkey|url=http://www.europeanforum.net/country/turkey|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120728194544/http://www.europeanforum.net/country/turkey|archive-date=28 July 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=289}}|| CHP || {{no2}} [[2023 Turkish parliamentary election|in opposition]] || Took [[Social Democratic Populist Party (Turkey)|Social Democratic Populist Party]]'s place in 1995.{{sfn|Lamb|Docherty|2006|p=289}}
| colspan="2" |{{Composition bar|128|600|{{party color|Republican People's Party}}|per=1}}
|-
 || {{URY}} || [[New Space (Uruguay)|New Space]]<ref>{{cite web|title=Nuevo Espacio|url=http://www.nuevoespacio.org.uy/partido/|publisher=[[New Space (Uruguay)]]|language=es|access-date=14 July 2012|archive-url=https://web.archive.org/web/20130729115606/http://www.nuevoespacio.org.uy/partido/|archive-date=29 July 2013|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=253}}|| PNE || {{no2}} [[2019 Uruguayan general election|in opposition]] || Admitted as consultative member in 1999.<ref name="xxi" /> Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=253}}Party does not individually stand in elections but participates as part of the [[Broad Front (Uruguay)|Broad Front]].
|-
 | rowspan="3" | {{VEN}} || [[A New Era]]|| UNT || {{no2}} [[2020 Venezuelan parliamentary election|extra-parliamentary]] || Admitted as consultative member in 2013.<ref name="feb2013">{{cite web|url=http://www.socialistinternational.org/images/dynamicImages/files/Council%20decisions-1.pdf|title=Decisions of the Council|website=socialistinternational.org|access-date=2 March 2020|url-status=dead|archive-url=https://web.archive.org/web/20180907221513/http://www.socialistinternational.org/images/dynamicImages/files/Council%20decisions-1.pdf|archive-date=7 September 2018}}</ref> Promoted to full member in November 2015.<ref name="November2015" />
| colspan="2" |{{Composition bar|0|277|{{party color|A New Era}}|per=1}}
|-
| [[Democratic Action (Venezuela)|Democratic Action]]<ref>{{cite web|title=Propuestas|url=http://acciondemocratica.org.ve/ad/portal/propuestas.php|publisher=[[Democratic Action (Venezuela)|Democratic Action]]|language=es|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120622054842/http://acciondemocratica.org.ve/ad/portal/propuestas.php|archive-date=22 June 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=100}}|| AD || {{no2}} [[2020 Venezuelan parliamentary election|in opposition]] || Observer member in 1966, consultative member in 1981, full member mid 1980s.{{sfn|Lamb|Docherty|2006|p=100}}
| colspan="2" |{{Composition bar|11|277|{{party color|Democratic Action (Venezuela)}}|per=1}}
|-
| [[Popular Will]]|| VP || {{no2}} [[2020 Venezuelan parliamentary election|extra-parliamentary]] || Admitted as full member in December 2014.<ref name="December2014SICouncil" />
| colspan="2" |{{Composition bar|0|277|{{party color|Popular Will}}|per=1}}
|-
 || {{YEM}} || [[Yemeni Socialist Party]]|| YSP || {{no2}} [[2003 Yemeni parliamentary election|in opposition]] || Admitted as observer member in 2003.<ref name="xxii" /> Promoted to consultative member in 2008.<ref name="xxiii" /><br />Promoted to full member in 2012.<ref name="xxiv" />
| colspan="2" |{{Composition bar|8|301|{{party color|Yemeni Socialist Party}}|per=1}}
|}

===Consultative parties===
There are 19 consultative parties:<ref name=members/><ref name=broadleft/>
{|class="wikitable sortable" style="text-align:left; font-size:95%"
|-
! style="background:#d82628; color:#fff;"|Country
! style="background:#d82628; color:#fff;"|Name
! style="background:#d82628; color:#fff;"|Abbr
! style="background:#d82628; color:#fff;"|Government
! style="background:#d82628; color:#fff;"|Notes
! style="background:#d82628; color:#fff;"|Lower House
! style="background:#d82628; color:#fff;"|Upper House
|-
 || {{BWA}} || [[Botswana Democratic Party]] || BDP || {{yes2}} [[2019 Botswana general election|in government]] || Admitted as consultative member in June/July 2014.<ref name=JuneJuly2014SICouncil/>
| colspan="2" |{{Composition bar|38|65|{{party color|Botswana Democratic Party}}|per=1}}
|-
|{{COD}}
|[[Unified Lumumbist Party]]
|PALU|| {{no2}} [[2018 Democratic Republic of the Congo general election|in opposition]] 
|Admitted as observer member in December 2014.<ref name="December2014SICouncil" /> Upgraded to consultative in 2019.
|{{Composition bar|17|500|{{party color|Unified Lumumbist Party}}|per=1}}
|{{Composition bar|2|108|{{party color|Unified Lumumbist Party}}|per=1}}
|-
|{{flag|Djibouti}}
|[[Movement for Democratic Renewal and Development]]
|MRD
| {{n/a}}
|Admitted as consultative members in 2019.
|-
 || {{flag|Eswatini}}||[[People's United Democratic Movement]] || PUDEMO || {{n/a}} || Admitted as consultative member in 2013.<ref name=feb2013/> Political parties are banned in Eswatini.
|-
 || {{GAB}} || [[Gabonese Progress Party]] || PGP || {{n/a}} || Admitted as consultative member in 1996.<ref name=xx/> 
| colspan="2" |{{Composition bar|0|143|{{party color|Gabonese Progress Party}}|per=1}}
|-
 || {{GMB}} || [[United Democratic Party (The Gambia)|United Democratic Party]] || UDP || {{no2}} [[2022 Gambian parliamentary election|in opposition]] || Admitted as consultative member in 2012.<ref name=xxiv/>
| colspan="2" |{{Composition bar|15|58|{{party color|United Democratic Party (The Gambia)}}|per=1}}
|-
 || {{GEO}} || [[Social Democrats for the Development of Georgia]] || SDD || {{no2}} [[2020 Georgian parliamentary election|extra-parliamentary]] || Admitted as consultative member in 2013.<ref name=feb2013/>
| colspan="2" |{{Composition bar|0|150|{{party color|Social Democrats for the Development of Georgia}}|per=1}}
|-
|{{GHA}}
|[[Convention People's Party]]
|CPP
|{{no2}} [[2020 Ghanaian general election|extra-parliamentary]]
|Admitted as consultative member in 2018
| colspan="2" |{{Composition bar|0|275|{{party color|Convention People's Party}}|per=1}}
|-
 || {{GNB}} || [[African Party for the Independence of Guinea and Cape Verde]] || PAIGC || {{no2}} [[2019 Guinea-Bissau presidential election|in opposition]] || Admitted as consultative member in 2008.<ref name=xxiii/> 
| colspan="2" |{{Composition bar|47|102|{{party color|African Party for the Independence of Guinea and Cape Verde}}|per=1}}
|-
 | rowspan="2"| {{IRN}} || [[Democratic Party of Iranian Kurdistan]] || PDKI || {{n/a}} || Admitted as observer member in 1996.<ref name=xx/> Promoted to consultative member in 2008.<ref name=xxiii/> Officially banned in Iran.
|-
| [[Komala Party of Iranian Kurdistan]] || KPIK || {{n/a}} || Admitted as observer member in 2014<ref>{{Cite web |title=Decisions on membership taken during the inter-congress period ratified by the XXV Congress |url=https://www.socialistinternational.org/councils/geneva-2014/ |access-date=2022-05-09 |website=Socialist International |language=en}}</ref> Promoted to consultative member in 2018<ref>{{Cite web |title=Geneva 2018 |url=https://www.socialistinternational.org/councils/geneva-2018/ |access-date=2022-05-09 |website=Socialist International |language=en}}</ref> Officially banned in Iran.
|-
 | rowspan="2"| {{flag|Palestine}} || [[Palestinian National Initiative]]<ref name=palestine/> || PNI || {{no2}} [[2006 Palestinian legislative election|in opposition]] || Admitted as observer member in 2008.<ref name=xxiii/> Promoted to consultative member in 2012.<ref name=xxiv/>
| colspan="2" |{{Composition bar|2|132|{{party color|Palestinian National Initiative}}|per=1}}
|-
|[[Palestinian Popular Struggle Front]]
|PPSF
|{{partial|}} [[Palestine Liberation Organization|junior partner in coalition]] 
|Admitted as consultative member in 2018.
| colspan="2" |{{Composition bar|0|132|{{party color|Palestinian Popular Struggle Front}}|per=1}}
|-
 || {{flag|Sahrawi Republic}} || [[Polisario Front]] || POLISARIO || {{yes2}} [[2023 Sahrawi legislative election|in government]] || Admitted as observer member in 2008.<ref name=xxiii/> Promoted to consultative member in 2017.<ref>[http://www.spsrasd.info/news/en/articles/2017/03/04/7511.html Polisario Front becomes consultative member of Socialist International association] [[Sahara Press Service]], 4 March 2017</ref><ref>[http://www.socialistinternational.org/viewArticle.cfm?ArticlePageID=931 MEMBER PARTIES of the SOCIALIST INTERNATIONAL - Consultative parties] Socialist International</ref>
| colspan="2" |{{Composition bar|51|51|{{party color|Polisario Front}}|per=1}}
|-
 || {{flag|São Tomé and Príncipe}} || [[Movement for the Liberation of São Tomé and Príncipe/Social Democratic Party]] || MLSTP/PSD || {{no2}}[[2022 São Toméan parliamentary election|in opposition]] || Admitted as consultative member in 2013.<ref name=feb2013/>
| colspan="2" |{{Composition bar|18|55|{{party color|Movement for the Liberation of São Tomé and Príncipe – Social Democratic Party}}|per=1}}
|-
 || {{flag|Syria}} || [[Democratic Union Party (Syria)|Democratic Union Party]] || PYD || {{no2}}[[2020 Syrian parliamentary election|extra-parliamentary opposition]] || Admitted as consultative member in November 2015.<ref name=November2015/>
| colspan="2" |{{Composition bar|0|250|{{party color|Democratic Union Party (Syria)}}|per=1}}
|-
 || {{TGO}} || [[Democratic Convention of African Peoples]] || CDPA || {{no2}}[[2018 Togolese parliamentary election|extra-parliamentary opposition]] || Admitted as consultative member in 1999.<ref name=xxi/>
| colspan="2" |{{Composition bar|0|91|{{party color|Democratic Convention of African Peoples}}|per=1}}
|-
 || {{UKR}} || [[Social Democratic Party of Ukraine]]<ref>{{cite web|title=Ukraine|url=http://www.europeanforum.net/country/ukraine|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120805233321/http://www.europeanforum.net/country/ukraine|archive-date=5 August 2012|url-status=dead}}</ref> || SDPU || {{no2}}[[2019 Ukrainian parliamentary election|extra-parliamentary opposition]] || Admitted as consultative member in 2003.<ref name=xxii/> 
| colspan="2" |{{Composition bar|0|450|{{party color|Social Democratic Party of Ukraine}}|per=1}}
|}

===Observer parties===
There are eight observer parties:<ref name=members/><ref name=broadleft/>
{|class="wikitable sortable" style="text-align:left; font-size:95%"
|-
! style="background:#d82628; color:#fff;"|Country
! style="background:#d82628; color:#fff;"|Name
! style="background:#d82628; color:#fff;"|Abbr
! style="background:#d82628; color:#fff;"|Government
! style="background:#d82628; color:#fff; width:750px;"|Notes
|-
 || {{flagcountry|Eswatini}} || [[Swazi Democratic Party]] || SWADEPA || {{n/a}} || Admitted as observer member in June/July 2014.<ref name=JuneJuly2014SICouncil/> 
|-
 || {{IRL}} || [[Labour Party (Ireland)|Labour Party]]<ref>{{cite web|title=International Solidarity|url=http://www.labour.ie/party/international/|publisher=[[Labour Party (Ireland)]]|date=5 May 2004|access-date=14 July 2012|archive-date=13 July 2019|archive-url=https://web.archive.org/web/20190713163313/https://www.labour.ie/party/international/|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=180}} || || {{no2}} [[2020 Irish general election|in opposition]] ||
|-
 || {{KEN}} || Labour Party of Kenya || || || Admitted as observer member in 2012.<ref name=xxiv/>
|-
 || {{KOS}} || [[Vetëvendosje]] || VV || {{yes2}} [[2021 Kosovan parliamentary election|in government]] || Admitted as observer member in 2018.
|-
 || {{flagcountry|Lesotho}} || [[Lesotho Congress for Democracy]] || LCD || {{partial|[[2022 Lesotho general election|junior party in coalition]]}} || Admitted as observer member in June/July 2014.<ref name=JuneJuly2014SICouncil/>
|-
 || {{flagcountry|Serbia}} || [[Social Democratic Party of Serbia]] || SDPS || {{partial|[[2023 Serbian parliamentary election|junior party in coalition]]}} || Admitted as observer member in 2018.
|-
 || {{flagcountry|Somaliland}} || [[Justice and Welfare Party]] || JWP || {{no2}} [[2017 Somaliland presidential election|in opposition]] || Admitted as observer member in 2013<ref>{{Cite web |title=Istanbul 2013 |url=https://www.socialistinternational.org/councils/istanbul-2013/ |access-date=2022-05-09 |website=Socialist International |language=en}}</ref>
|-
|| {{UK}} || [[Labour Party (UK)|Labour Party]]{{sfn|Lamb|Docherty|2006|p=63}} || || {{yes2}} [[2024 United Kingdom general election|in government]] || Member since 1951.{{sfn|Lamb|Docherty|2006|p=63}} Currently holds a majority in Westminster, following the [[2024 United Kingdom general election]]. [[Welsh Labour]] is [[2021 Senedd election|in government]] [[Welsh Government|in Wales]] and [[London Labour]] [[2021 London mayoral election|holds]] the [[Mayor of London|London Mayoralty]]. The party asked to be downgraded to observer status in February 2013 "in view of ethical concerns, and to develop international co-operation through new networks."<ref>Black, Ann. (6 February 2013) [http://www.leftfutures.org/2013/02/report-from-labours-january-executive/ Report from Labour’s January executive]. Left Futures. Retrieved on 15 July 2013.</ref> The request was accepted later that year.
|-
 || {{UK}} ([[Northern Ireland]]) ||[[Social Democratic and Labour Party]]<ref>{{cite web|title=Our History|url=http://www.sdlp.ie/index.php/about_sdlp/our_history/|archive-url=https://web.archive.org/web/20091120142017/http://www.sdlp.ie/index.php/about_sdlp/our_history/|url-status=dead|archive-date=20 November 2009|publisher=[[Social Democratic and Labour Party]]}}</ref>{{sfn|Lamb|Docherty|2006|p=305}} || SDLP || {{no2}} [[2022 Northern Ireland Assembly election|in opposition]] || Admitted as a full member in 1974.{{sfn|Lamb|Docherty|2006|p=305}}
|}

===Former members===
{{Incomplete list|date=July 2024}}
{|class="wikitable sortable" style="text-align:left; font-size:95%"
|-
! style="background:#d82628; color:#fff;"|Country
! style="background:#d82628; color:#fff;"|Name
! style="background:#d82628; color:#fff;"|Abbr
! style="background:#d82628; color:#fff; width:750px;"|Notes
|-
|| {{ALB}} || [[Social Democratic Party of Albania]]{{sfn|Lamb|Docherty|2006|p=27}} || PSD || Admitted as consultative member in 1992.<ref name=xix/> Promoted to full member in 1996.<ref name=xx/>{{sfn|Lamb|Docherty|2006|p=27}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name=members/> Delisted in December 2014.
|-
|{{flag|Algeria}}
|[[National Liberation Front (Algeria)|National Liberation Front]]|| FLN ||Expelled following the [[2019–2021 Algerian protests|2019 Algerian protests]]. 
|-
 || {{AND}}||[[New Democracy (Andorra)|New Democracy]]|| ND || Admitted as consultative member in 1999.<ref name="xxi" />
|-
 || {{ATG}}||[[Antigua and Barbuda Labour Party]]|| ALP || Admitted as consultative member in 2008.<ref name="xxiii" />
|-
 | rowspan="2"| {{ARG}}||[[Popular Socialist Party (Argentina)|Popular Socialist Party]]|| PSP || Admitted as full member in 1992.<ref name="xix" /> Merged with the [[Democratic Socialist Party (Argentina)|Democratic Socialist Party]] to form the [[Socialist Party (Argentina)|Socialist Party]].
|-
|[[Socialist Party (Argentina)|Socialist Party]]<ref>{{cite web|url=http://www.partidosocialista.com.ar/PS/seccion.php?go=ps&t=h|title=Historia del Partido Socialista|publisher=[[Socialist Party (Argentina)]]|language=es|archive-url=https://web.archive.org/web/20120730121652/http://www.partidosocialista.com.ar/PS/seccion.php?go=ps&t=h|archive-date=30 July 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=35}} || PS || Full member since 1951.{{sfn|Lamb|Docherty|2006|p=35}}
|-
|{{AZE}}
|[[Azerbaijani Social Democratic Party]]
|ASDP
|Admitted as observer member in 1996.<ref name="xx" /> Promoted to consultative member in 2003.<ref name="xxii" /> Readmitted as consultative member in June/July 2014.<ref name="JuneJuly2014SICouncil" /> Admitted as full member in 2016.<ref name="SI Member Parties in Government" /> Party dissolved in 2023.<ref>{{cite web | title=Ölkənin ən məşhur partiyası özünü buraxdı: Əlizadələrin qurduğu 34 illik ASDP-nin son beyanati| website=Yeni Müsavat | url=https://musavat.com/news/olkenin-en-meshur-partiyasi-ozunu-buraxdi-elizadelerin-qurdugu-34-illik-asdp-nin-son-beyanati_967970.html?d=1|date=4 April 2023 | language=az | access-date=9 April 2024}}</ref>
|-
 || {{ARU}}||[[People's Electoral Movement (Aruba)|People's Electoral Movement]]{{sfn|Lamb|Docherty|2006|p=270}}|| MEP || Promoted to full member in 1992.<ref name="xix" /> Full member since 1994.{{sfn|Lamb|Docherty|2006|p=270}} Delisted in December 2014.
|-
 || {{AUS}}||[[Australian Labor Party]]{{sfn|Lamb|Docherty|2006|p=41}}|| ALP || Admitted as full member in 1966.{{sfn|Lamb|Docherty|2006|p=41}} Delisted in December 2014.
|-
 || {{AUT}} || [[Social Democratic Party of Austria]] || SPÖ || Admitted as a full member in 1951.{{sfn|Lamb|Docherty|2006|p=44}} Delisted in 2022.
|-
 || {{BAR}}||[[Barbados Labour Party]]{{sfn|Lamb|Docherty|2006|p=46}}|| BLP || Admitted as full member in 1987.{{sfn|Lamb|Docherty|2006|p=46}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 | rowspan="2"| {{BEL}}||[[Belgian Socialist Party]]|| PSB/BSP || Founder member. Split in 1978.
|-
|[[Forward (Belgium)|Forward]]|| || Delisted in 2017.
|-
 | rowspan="2"| {{BEN}}|| Democratic Union of Progressive Forces || UDFP || Admitted as observer member in 1992.<ref name="xix" />
|-
|[[Social Democratic Party (Benin)|Social Democratic Party]]{{sfn|Lamb|Docherty|2006|p=310}}
|PSD|| Admitted as consultative member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=310}} Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=310}}
|-
|| {{BIH}}||[[Alliance of Independent Social Democrats]]|| SNSD || Admitted as consultative member in 2003.<ref name="xxii" /> Promoted to full member in 2008<ref name="xxiii" /> Expelled in August 2012.<ref name="xxiv" />
|-
 || {{BWA}}||[[Botswana National Front]]|| BNF || Admitted as observer member in 1996.<ref name="xx" />
|-
 || {{BOL}}||[[Revolutionary Left Movement (Bolivia)|Revolutionary Left Movement]]{{sfn|Lamb|Docherty|2006|p=241}}|| MIR || Admitted as consultative member in 1986.<ref name="xvii" /> Consultative member in 1987.{{sfn|Lamb|Docherty|2006|p=241}} Promoted to full member in 1992.<ref name="xix" />{{sfn|Lamb|Docherty|2006|p=241}}
|-
 || {{BUL}}||[[Bulgarian Euro-Left]]|| BEL<ref name="Bugajski2002">{{cite book |author=Janusz Bugajski|title=Political Parties of Eastern Europe: A Guide to Politics in the Post-Communist Era|url=https://books.google.com/books?id=9gGKtLTQlUcC&pg=PA790|access-date=6 February 2013|year=2002|publisher=M.E. Sharpe|isbn=978-1-56324-676-0|pages=790–}}</ref>|| Admitted as observer member in 1999.<ref name="xxi" />
|-
 || {{BUR}}||[[Party for Democracy and Progress / Socialist Party]]{{sfn|Lamb|Docherty|2006|p=265}}|| PDP/PS || Admitted as full member circa 1995.{{sfn|Lamb|Docherty|2006|p=265}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{BDI}}||[[Front for Democracy in Burundi]]|| FRODEBU || Admitted as consultative member in 2003.<ref name="xxii" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /><br /> Delisted in December 2014.
|-
 || {{flag|Canada|1957}}||[[Co-operative Commonwealth Federation]]|| CCF || Became the [[New Democratic Party]] in 1961.
|-
 || {{CAN}}||[[New Democratic Party]]{{sfn|Lamb|Docherty|2006|p=251}}|| NDP/NPD || Delisted in 2018.<ref>{{cite news|url=https://www.cbc.ca/news/politics/ndp-votes-to-take-socialism-out-of-party-constitution-1.1385171|title=NDP votes to take 'socialism' out of party constitution|work=CBC News|author=Laura Payton|date=14 April 2013|access-date=26 May 2020}}</ref>{{Failed verification|date=July 2020}}
|-
 || {{CAF}}|| Movement for Democracy and Social Progress || MDPS || Admitted as observer member in 1992.<ref name="xix" />
|-
 || {{IRN}} || [[Kurdistan Democratic Party (Iran)|Kurdistan Democratic Party]] || KDP || Admitted as a full member in November 2015.<ref name=November2015/> Party dissolved in 2022.<ref>{{Cite web |url=https://www.rudaw.net/sorani/kurdistan/2108202226 |access-date=2023-12-30 |website=www.rudaw.net|title=Rudaw}} {{dead link|date=April 2024}}</ref>
|-
 || {{flag|Kyrgyzstan}} || [[Social Democratic Party of Kyrgyzstan]] || SDPK || Promoted to full member in June 2018. Party dissolved in 2020.|<ref>{{Cite web |last=ОСМОНАЛИЕВА |first=Бактыгуль |date=2020-05-27 |title=Как похоронили СДПК. Эпитафия для партии Алмазбека Атамбаева - |url=https://24.kg/vlast/153885_kak_pohoronili_sdpk_epitafiya_dlya_partii_almazbeka_atambaeva_/ |access-date=2023-12-30 |website=24.kg |language=ru-RU}}</ref>
|-
 || {{CIV}}||[[Ivorian Popular Front]]{{sfn|Lamb|Docherty|2006|p=184}}|| FPI || Admitted as consultative member in 1992.<ref name="xix" /> Promoted to full member in 1996.<ref name="xx" />{{sfn|Lamb|Docherty|2006|p=184}} Expelled in March 2011.<ref name="SI190311">{{cite web |title=SI Presidium addresses situation in Côte d'Ivoire|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=2104|publisher=Socialist International|date=19 March 2011}}</ref>
|-
| rowspan="2"| {{COL}}||[[Alternative Democratic Pole]]|| PDA || Former observer member. Delisted in December 2014.
|-
|[[19th of April Movement|M-19 Democratic Alliance]]|| AD/M-19 || Admitted as observer member in 1992.<ref name="xix" />
|-
 || {{CUW}}||[[Partido MAN]]|| MAN || Promoted to full member in 1989.<ref name="xviii" /> Delisted in 2017.
|-
 || {{DEN}}||[[Social Democrats (Denmark)|Social Democrats]]|| SD || Founding member. Withdrew in 2017.
|-
 || {{DMA}}||[[Dominica Labour Party]]|| DLP || Admitted as consultative member in 1996.<ref name="xx" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{ECU}}||[[Democratic Left (Ecuador)|Democratic Left]]{{sfn|Lamb|Docherty|2006|p=102}}|| PID || Member since 1987.{{sfn|Lamb|Docherty|2006|p=102}} Delisted in 2017.
|-
| rowspan="2" |{{EGY}}
|[[Egyptian Social Democratic Party]]|| ESDP (or HMDI in [[Arabic]])|| Admitted as consultative member in 2012.<ref name="xxiv" /> Promoted to full member in November 2015.<ref name="November2015" /> Delisted in 2019 due to non-payment of membership fees.
|-
|[[National Democratic Party (Egypt)|National Democratic Party]]{{sfn|Lamb|Docherty|2006|p=245}}|| NDP || Admitted as full member in 1989.<ref name="xviii" /> Full member since 1992.{{sfn|Lamb|Docherty|2006|p=245}} Expelled in January 2011.<ref name="SI310111">{{cite web|title=Letter to the General Secretary of the National Democratic Party, NDP Egypt|url=http://www.socialistinternational.org/images/dynamicImages/files/Letter%20NDP.pdf|publisher=Socialist International|date=31 January 2011|access-date=6 February 2011|archive-date=3 February 2011|archive-url=https://web.archive.org/web/20110203165721/http://www.socialistinternational.org/images/dynamicImages/files/Letter%20NDP.pdf|url-status=dead}}</ref><ref>{{cite news|last=Gültaşli|first=Selçuk|title=Socialist International cancels Mubarak's party membership|url=http://www.todayszaman.com/news-234418-socialist-international-cancels-mubaraks-party-membership.html|newspaper=[[Today's Zaman]]|date=4 February 2011|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120103005406/http://www.todayszaman.com/news-234418-socialist-international-cancels-mubaraks-party-membership.html|archive-date=3 January 2012|url-status=dead}}</ref><ref>{{cite news |last=Weigel|first=David|title=Socialist International Kicks Out Mubarak|url=http://www.slate.com/blogs/weigel/2011/02/04/socialist_international_kicks_out_mubarak.html|newspaper=[[Slate (magazine)|Slate]]|date=4 February 2011}}</ref>
|-
 || {{ELS}}|| Democratic Party || PD || Admitted as observer member in 1996.<ref name="xx" />
|-
 || {{EST}}||[[Social Democratic Party (Estonia)|Social Democratic Party]]<ref>{{cite web|title=History|url=http://www.sotsdem.ee/en/sotsidest/history/|publisher=[[Social Democratic Party (Estonia)]]|access-date=14 July 2012|archive-url=https://web.archive.org/web/20110810004058/http://www.sotsdem.ee/en/sotsidest/history/|archive-date=10 August 2011|url-status=dead}}</ref><ref name="hdos119">{{cite book|title=Historical Dictionary of Socialism|year=2006|publisher=The Scarecrow Press|isbn=978-0-8108-5560-1|page=119|url=https://www.scribd.com/doc/34254398/Docherty-Historical-Dictionary-of-Socialism|author=Peter Lamb|edition=Second|author2=James C. Docherty|access-date=12 September 2017|archive-date=23 February 2014|archive-url=https://web.archive.org/web/20140223115609/http://www.scribd.com/doc/34254398/Docherty-Historical-Dictionary-of-Socialism|url-status=dead}}</ref>|| SDE || Member since 1990.<ref name="hdos119" /> Withdrew in 2017.
|-
 || {{FIJ}}||[[Fiji Labour Party]]|| FLP || Admitted as consultative member in 1992.<ref name="xix" /> Expelled in 2008, due to the party's participation in a government issued from a [[2006 Fijian coup d'état|military coup]].<ref name="xxiii" />
|-
 || {{FRA}}||[[French Section of the Workers' International]]|| SFIO || Founding member. Member in 1951–1969.
|-
 || {{GEO}}||[[Union of Citizens of Georgia]]|| CUG || Admitted as observer member in 1996.<ref name="xx" /> Party disbanded in 2003.
|-
 || {{GER}}||[[Social Democratic Party of Germany]]|| SPD || Founding member. Withdrew in 2017.
|-
 || {{GRL}}||[[Siumut]]|| || Admitted as consultative member in 1986.<ref name="xvii" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{GUA}}|| Social Democratic Convergence{{sfn|Lamb|Docherty|2006|p=306}}|| CSD || Admitted as consultative member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=306}}
|-
 | rowspan="3"| {{HAI}}|| Party of the National Congress of Democratic Movements || KONAKOM || Admitted as consultative member in 1992.<ref name="xix" /> Promoted to full member in 1996.<ref name="xx" />
|-
|[[Struggling People's Organization]] ||OPL || Admitted (as Lavalas Political Organisation) as observer member in 1996.<ref name="xx" />
|-
| Revolutionary Progressive Nationalist Party || PANPRA || Admitted as consultative member in 1989.<ref name="xviii" /> Promoted to full member in 1992.<ref name="xix" />
|-
|{{HUN}}
|[[Social Democratic Party of Hungary]]
|MSZDP|| Member since 1990. Admitted as observer member in 1992. Promoted to consultative member in 1999.
Promoted to full member in 2003. Delisted in 2020 due to inactivity
|-
 | rowspan="2"| {{ISL}}||[[Social Democratic Party (Iceland)|Social Democratic Party]]|| A || Member since 1987.{{sfn|Lamb|Docherty|2006|p=160}} Formed [[Social Democratic Alliance]] in 2000.
|-
|[[Social Democratic Alliance]]|| S || Withdrew in 2017.
|-
 || {{IRN}}||[[League of Iranian Socialists]]|| || Joined in 1960.<ref>{{citation|title=Iran Almanac and Book of Facts|issue=5|publisher=Echo of Iran|year=1966|edition=5th|page=240|chapter=Socialist League}}</ref> It was dissolved in 1980s.
|-
|| {{ISR}} || [[Israeli Labor Party]]<ref name="israel"/>{{sfn|Lamb|Docherty|2006|p=308}} || Avoda || Until May 2020, it temporarily suspended membership in July 2018 over SI's adoption of [[Boycott, Divestment and Sanctions|BDS]] policies.<ref>{{cite news | url=https://www.jpost.com/BDS-THREAT/Israels-Labor-party-quits-Socialist-International-after-it-adopts-BDS-562149 | title=Israel's Labor party quits Socialist International after it adopts BDS - BDS - Jerusalem Post| newspaper=The Jerusalem Post &#124; Jpost.com}}</ref>
|-
 | rowspan="4"| {{ITA}}||[[Democratic Party of the Left]]|| PDS || Admitted as full member in 1992.<ref name="xix" /> Merged with others to form [[Democrats of the Left]] in 1998.
|-
|[[Democrats of the Left]]{{sfn|Lamb|Docherty|2006|p=105}}|| DS || Full member since 1992 as [[Democratic Party of the Left]].{{sfn|Lamb|Docherty|2006|p=105}} Merged with other movements to form the [[Democratic Party (Italy)|Democratic Party]] in 2007. Listed as SI member until XXIV Congress in 2012.
|-
|[[Italian Socialist Party]]|| PSI || Party dissolved in 1994 and succeeded by the [[Italian Socialists]] (who formed the [[Italian Democratic Socialists]] in 1998 and resumed as the [[Italian Socialist Party (2007)|Italian Socialist Party]] in 2007).
|-
|[[Italian Democratic Socialist Party]]|| PSDI ||Founding member. Party merged into the [[Italian Democratic Socialists]] in 1998 (renamed into [[Italian Socialist Party (2007)|Italian Socialist Party]] in 2007).
|-
 |  rowspan="2" | {{JAP}}||[[Democratic Socialist Party (Japan)|Democratic Socialist Party]]|| DSP/Minsha-tō ||Admitted as SI member in 1961.<ref name="DochertyLamb2006">{{cite book |author1=James C. Docherty|author2=Peter Lamb|title=Historical Dictionary of Socialism|url=https://books.google.com/books?id=JRYjU-L4F7wC&pg=PA187|access-date=28 January 2013|date=2 October 2006|publisher=Scarecrow Press|isbn=978-0-8108-6477-1|pages=187–}}</ref> Merged with non-socialist movements to form the [[New Frontier Party (Japan)|New Frontier Party]] in 1994.
|-
|[[Japan Socialist Party]]|| JSP/Shakai-tō || Admitted as SI member in 1951.{{sfn|Lamb|Docherty|2006|p=186}} Refounded as the [[Social Democratic Party (Japan)|Social Democratic Party]] in 1996.
|-
 || {{JOR}}|| Jordanian Democratic Party of the Left || JDPL || Admitted as observer member in 2003.<ref name="xxii" />
|-
 || {{KGZ}}||[[Ata Meken Socialist Party]]<ref>{{cite web|title=Kyrgyzstan|url=http://www.europeanforum.net/country/kyrgyzstan|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120617104457/http://www.europeanforum.net/country/kyrgyzstan|archive-date=17 June 2012|url-status=dead}}</ref>|| || Admitted as observer member in 2008.<ref name="xxiii" />
|-
 | rowspan="2"| {{LAT}}||[[Latvian Social Democratic Workers' Party]]{{sfn|Lamb|Docherty|2006|p=203}}|| LSDSP || Full member since 1994.{{sfn|Lamb|Docherty|2006|p=203}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /><br /> Delisted in December 2014.
|-
|[[Social Democratic Party "Harmony"]]|| SDPS || Admitted as consultative member in June/July 2014.<ref name="JuneJuly2014SICouncil" /> Withdrew in 2017.
|-
 || {{MKD}}||[[Social Democratic Union of Macedonia]]<ref>{{cite web|title=International cooperation|url=http://www.sdsm.org.mk/Default.aspx?mId=83&lId=2|publisher=[[Social Democratic Union of Macedonia]]|access-date=14 July 2012|archive-date=8 September 2018|archive-url=https://web.archive.org/web/20180908015645/http://www.sdsm.org.mk/Default.aspx?mId=83&lId=2|url-status=dead}}</ref><ref>{{cite web|title=FYR Macedonia|url=http://www.europeanforum.net/country/fyr_macedonia|publisher=European Forum for Democracy and Solidarity|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120813084523/http://www.europeanforum.net/country/fyr_macedonia|archive-date=13 August 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=315}}|| SDSM || Admitted as observer member in 1996.<ref name="xx" /> Promoted to full member in 2003.<ref name="xxii" />{{sfn|Lamb|Docherty|2006|p=315}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{MAD}}|| Party for National Unity || VITM || Admitted as consultative member in 1989.<ref name="xviii" />
|-
 || {{MYS}}||[[Democratic Action Party]]<ref name="International Solidarity">{{cite web |title=International Solidarity|url=https://dapmalaysia.org/en/about-us/international-solidarity/|publisher=[[Democratic Action Party]]}}</ref>{{sfn|Lamb|Docherty|2006|p=100}}|| DAP || Full member since 1987.{{sfn|Lamb|Docherty|2006|p=100}} Delisted in 2017.<ref name="International Solidarity" />
|-
 || {{MLT}}||[[Labour Party (Malta)|Labour Party]]{{sfn|Lamb|Docherty|2006|p=220}}|| PL || Full member since 1955.{{sfn|Lamb|Docherty|2006|p=220}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
|{{MEX}}
|[[Party of the Democratic Revolution]]{{sfn|Lamb|Docherty|2006|p=268}}
|PRD|| Admitted as full member in 1996.<ref name="xx" />{{sfn|Lamb|Docherty|2006|p=268}}
|-
 || {{MDA}}||[[Social Democratic Party (Moldova)|Social Democratic Party of Moldova]]|| PSDM || Admitted as observer member in 1996.<ref name="xx" />
|-
 || {{MNG}} || [[Mongolian Social Democratic Party]]{{sfn|Lamb|Docherty|2006|p=238}} || MSDP || Admitted as consultative member in 1992.<ref name=xix/>{{sfn|Lamb|Docherty|2006|p=238}} Promoted to full member in 1996.<ref name=xx/> Merged with others in 2000 to form the [[Democratic Party (Mongolia)|Democratic Party]].
|-
 || {{NAM}}||[[Congress of Democrats]]|| CoD || Admitted as consultative member in 2003.<ref name="xxii" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{NLD}}||[[Labour Party (Netherlands)|Labour Party]]<ref>{{cite web|title=Partners|url=http://internationaal.pvda.nl/general/Partners|publisher=[[Labour Party (Netherlands)]]|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120726145535/http://internationaal.pvda.nl/general/Partners|archive-date=26 July 2012|url-status=dead}}</ref>|| PvdA || Decided to minimise involvement in SI in December 2012.<ref>[http://www.pvda.nl/berichten/2012/12/PvdA+steunt+oprichting+Progressive+Alliance PvdA steunt oprichting Progressive Alliance | PvdA] {{Webarchive|url=https://web.archive.org/web/20150924083343/http://www.pvda.nl/berichten/2012/12/PvdA+steunt+oprichting+Progressive+Alliance |date=24 September 2015 }}. Pvda.nl (19 December 2012). Retrieved on 15 July 2013.</ref> Delisted in December 2014.
|-
 || {{NZL}}||[[New Zealand Labour Party]]{{sfn|Lamb|Docherty|2006|p=253}}|| NZLP || Member since 1952.{{sfn|Lamb|Docherty|2006|p=253}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
|{{Flagicon|Nicaragua}}[[Nicaragua]]
|[[Sandinista National Liberation Front]]
|FSLN
|Expelled in January 2019 because of violation of human rights during the [[2018–2021 Nicaraguan protests|Nicaraguan protests]]
|-
|{{flag|Nigeria}}
|[[All Progressives Congress]]<ref name="palestine" />
|APC|| Admitted as consultative member in December 2014.<ref name="December2014SICouncil" />
|-
 || {{flag|North Vietnam}}||[[Socialist Party of Vietnam|Vietnamese Socialist Party]]{{sfn|Lamb|Docherty|2006|p=355}}|| || Consultative member between 1955 and 1969.{{sfn|Lamb|Docherty|2006|p=355}}
|-
|| {{NOR}}||[[Labour Party (Norway)|Labour Party]]<ref>{{cite web |title=Information in English|url=http://arbeiderpartiet.no/Kontakt/Information-in-English|publisher=[[Labour Party (Norway)]]}}</ref>{{sfn|Lamb|Docherty|2006|p=255}}|| DNA || Member since 1951.{{sfn|Lamb|Docherty|2006|p=255}} Withdrew in 2016.
|-
 | rowspan="2"| {{PRY}}||[[Party for a Country of Solidarity]]<ref>{{cite web|title=Party for a Country of Solidarity|url=http://www.paissolidario.org.py/|publisher=[[Party for a Country of Solidarity]]|language=es|access-date=14 July 2012|archive-date=3 July 2008|archive-url=https://web.archive.org/web/20080703042956/http://www.paissolidario.org.py/|url-status=dead}}</ref>|| PPS || Admitted as consultative member in 2003.<ref name="xxii" /> Promoted to full member in 2008.<ref name="xxiii" />
|-
|[[Revolutionary Febrerista Party]]<ref>{{cite web |title=Socialist International met in Paraguay ahead of presidential elections|url=http://www.socialistinternational.org/viewArticle.cfm?ArticleID=1860|publisher=Socialist International}}</ref>{{sfn|Lamb|Docherty|2006|p=121}}|| PRF || Admitted as full member in the 1970s.{{sfn|Lamb|Docherty|2006|p=121}}
|-
 || {{PHL}}||[[Akbayan]]|| || Admitted as consultative member in 2003.<ref name="xxii" />
|-
 | rowspan="3"| {{POL}}||[[Democratic Left Alliance (Poland)|Democratic Left Alliance]]<ref>{{cite web|title=English|url=http://www.sld.org.pl/strony/40-english.html|publisher=[[Democratic Left Alliance (Poland)|Democratic Left Alliance]]|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120522000240/http://www.sld.org.pl/strony/40-english.html|archive-date=22 May 2012|url-status=dead}}</ref>{{sfn|Lamb|Docherty|2006|p=103}}|| SLD || Full member since 1996.{{sfn|Lamb|Docherty|2006|p=103}} Withdrew in 2017.
|-
|[[Labour Union (Poland)|Labour Union]]{{sfn|Lamb|Docherty|2006|p=352}}|| UP || Admitted as full member in 1996.<ref name="xx" />{{sfn|Lamb|Docherty|2006|p=352}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /><br /> Delisted in December 2014.
|-
|[[Social Democracy of the Republic of Poland]]|| SdRP || Admitted as full member in 1996.<ref name="xx" /> Absorbed into the [[Democratic Left Alliance (Poland)|Democratic Left Alliance]] in 1999.
|-
 || {{ROU}}||[[Democratic Party (Romania)|Democratic Party]]|| PD || Admitted as consultative member in 1996.<ref name="xx" /> Promoted to full member in 1999.<ref name="xxi" /> Merged with the [[Liberal Democratic Party (Romania)|Liberal Democratic Party]] to form the [[Democratic Liberal Party (Romania)|Democratic Liberal Party]].
|-
 || {{RUS}} || [[A Just Russia — Patriots — For Truth]]<ref>{{cite web|title=Russia|url=http://www.europeanforum.net/country/russia|publisher=European Forum for Democracy and Solidarity|url-status=dead|archive-url=https://web.archive.org/web/20120622115634/http://www.europeanforum.net/country/russia|archive-date=22 June 2012}}</ref><ref>{{cite web|title=Just Russia – member of Socialist International|url=http://mironov.info/socialist-international/just-russia-member-of-socialist-international/|publisher=[[Sergey Mironov]]|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120728215854/http://mironov.info/socialist-international/just-russia-member-of-socialist-international/|archive-date=28 July 2012|url-status=dead}}</ref> || SRZP || Admitted as observer member in 2008.<ref name=xxiii/> Promoted to consultative member in 2010. Promoted to full member in 2012.<ref name=xxiv/><ref>{{cite web|url=http://www.spravedlivo.ru/news/anews/19005.php|title=СПРАВЕДЛИВАЯ РОССИЯ стала полноправным членом Социнтерна|publisher=[[A Just Russia]]|language=ru|access-date=2 September 2012|archive-url=https://web.archive.org/web/20120907214414/http://www.spravedlivo.ru/news/anews/19005.php|archive-date=7 September 2012|url-status=dead}}</ref> Expelled in March 2022 for its support for the [[2022 Russian invasion of Ukraine|Russian invasion of Ukraine]].<ref>{{Cite web|url=https://www.socialistinternational.org/news/press-releases/decision-regarding-membership-of-a-just-russia-patriots-for-the-truth-party-1998/|title = Decision regarding membership of a Just Russia-Patriots-For the Truth Party}}</ref>
|-
 || {{RUS}}||[[Social Democratic Party of Russia (2001)|Social Democratic Party of Russia]]|| SDPR || Admitted as consultative member in 2003.<ref name="xxii" />
|-
|| {{KNA}}||[[Saint Kitts and Nevis Labour Party]]|| SKNLP || Admitted as consultative member in 1992.<ref name="xix" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 | rowspan="2"| {{LCA}}||[[Progressive Labour Party (Saint Lucia)|Progressive Labour Party]]|| || Expelled in 1992.<ref name="xix" />
|-
|[[Saint Lucia Labour Party]]|| SLP || Admitted as consultative member in 1992.<ref name="xix" /> Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 | rowspan="2"| {{VCT}}||[[Saint Vincent Labour Party]]|| SVGLP || Admitted as consultative member in 1989.<ref name="xviii" /> Merged with the [[Movement for National Unity]] in 1994 to form the [[Unity Labour Party]].
|-
|[[Unity Labour Party]]|| ULP || Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
| rowspan="2" |{{SRB}}
|[[Democratic Party (Serbia)|Democratic Party]]<ref name="serbia">{{cite web|url=http://www.europeanforum.net/country/serbia#social_democratic_parties|title=Serbia|publisher=European Forum for Democracy and Solidarity|archive-url=https://web.archive.org/web/20150530101254/http://www.europeanforum.net/country/serbia#social_democratic_parties|archive-date=30 May 2015|url-status=dead}}</ref>
|DS|| Admitted as consultative member in 2003.<ref name="xxii" /> Promoted to full member in 2008.<ref name="xxiii" />
|-
|[[Social Democratic Party (Serbia 2001–2010)|Social Democratic Party]]<ref name="serbia" />|| SDP || Admitted as consultative member in 2003.<ref name="xxii" /> Promoted to full member in 2008.<ref name="xxiii" /><br />Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Ceased to exist in 2009<ref name="serbia" />
|-
 || {{SIN}}||[[People's Action Party]]|| PAP || Resigned in 1976 in response to the [[Labour Party (Netherlands)|Dutch Labour Party]]'s charges of violations of human rights and detention of political prisoners without trial,<ref>{{Cite news|date=1976-06-01|title=Main Singapore Party Quits The Socialist International|language=en-US|work=[[The New York Times]]|url=https://www.nytimes.com/1976/06/01/archives/main-singapore-party-quits-the-socialist-international.html|access-date=2021-05-13|issn=0362-4331}}</ref> and DLP and the [[Labour Party (UK)|British Labour Party]]'s charges of media censorship.<ref>{{Cite news|date=31 May 1976|title=Facts refute the allegations by Dutch and British|work=New Nation|url=https://eresources.nlb.gov.sg/newspapers/Digitised/Article/newnation19760531-1.2.20|access-date=13 May 2021|via=NewspaperSG}}</ref><ref>{{Cite news|date=31 May 1976|title=Why there are Govt men in Chinese papers|work=New Nation|url=https://eresources.nlb.gov.sg/newspapers/Digitised/Article/newnation19760531-1.2.19|access-date=13 May 2021|via=NewspaperSG}}</ref>
|-
 | rowspan="2"| {{SVK}}||[[Party of the Democratic Left (Slovakia)|Party of the Democratic Left]]|| SDĽ || Admitted as full member in 1996.<ref name="xx" /> Merged with [[Direction – Slovak Social Democracy|Direction – Social Democracy]] in 2005.
|-
|[[Social Democratic Party of Slovakia]]|| SDSS || Admitted as full member in 1992.<ref name="xix" /> Merged with [[Direction – Slovak Social Democracy|Direction – Social Democracy]] in 2005.
|-
 | rowspan="2"| {{SVN}}||[[Slovenian Democratic Party]]|| SDS || Admitted (as the Social Democratic Party of Slovenia) as observer member in 1992.<ref name="xix" />
|-
|[[Social Democrats (Slovenia)|Social Democrats]]{{sfn|Lamb|Docherty|2006|p=316}}|| SD || Admitted (as [[Social Democrats (Slovenia)|United List of Social Democrats]]) as full member in 1996.<ref name="xx" />{{sfn|Lamb|Docherty|2006|p=316}} Demoted to observer member in 2012 due to non-payment of membership fees.<ref name="members" /> Delisted in December 2014.
|-
 || {{SWE}}||[[Swedish Social Democratic Party]]|| SAP || Withdrew in March 2017.<ref>{{cite web|url=http://www.vk.se/1953407/lofven-till-styrelsen-for-ny-organisation|title=Löfven till styrelsen för ny organisation|website=vk.se|language=sv|access-date=2 March 2020|url-status=dead|archive-url=https://web.archive.org/web/20170310162121/http://www.vk.se/1953407/lofven-till-styrelsen-for-ny-organisation|archive-date=10 March 2017}}</ref>
|-
 || {{CHE}}||[[Social Democratic Party of Switzerland]]<ref>{{cite web|title=Internationale socialiste|url=http://www.sp-ps.ch/fre/Parti/Organisation/PS-international/Internationale-socialiste|publisher=[[Social Democratic Party of Switzerland]]|language=fr|access-date=14 July 2012|archive-url=https://web.archive.org/web/20120305235909/http://www.sp-ps.ch/fre/Parti/Organisation/PS-international/Internationale-socialiste|archive-date=5 March 2012|url-status=dead}}</ref>|| SP/PS || Withdrew in 2017.
|-
|{{TAN}}
|[[Chama Cha Mapinduzi]] ||CCM|| Admitted as full member in 2013.
|-
|{{TLS}}
|[[Fretilin|Revolutionary Front for an Independent East Timor]] ||FRETILIN|| Admitted as consultative member in 2003.<ref name="xxii" />
|-
 | rowspan="2"| {{TUN}}||[[Democratic Constitutional Rally]]{{sfn|Lamb|Docherty|2006|p=101}}|| RCD || Admitted as full member in 1989.<ref name="xviii" /> Full member since 1993.{{sfn|Lamb|Docherty|2006|p=101}} Expelled in January 2011.<ref name="SI170111">{{cite web |title=SI decision on Tunisia|url=https://www.socialistinternational.org/news/press-releases/si-decision-on-tunisia-1141|publisher=Socialist International|date=17 January 2011}}</ref>
|-
|[[Popular Unity Movement]]|| MUP || Admitted as consultative member in 1989.<ref name="xviii" />
|-
 | rowspan="4"| {{TUR}}||[[Democratic Left Party (Turkey)|Democratic Left Party]]|| DSP || Admitted as consultative member in 1986.<ref name="xvii" /> Expelled in 1992.<ref name="xix" />
|-
|[[Democratic People's Party (Turkey)|Democratic People's Party]]|| DEHAP || Admitted as observer member in 2003.<ref name="xxii" /> Merged with the Democratic Society Movement to form the [[Democratic Society Party]] which in turn was succeeded by the [[Peace and Democracy Party]].
|-
|[[Social Democracy Party (Turkey)|Social Democracy Party]]{{sfn|Lamb|Docherty|2006|p=289}}|| SODEP || Full member since 1990.{{sfn|Lamb|Docherty|2006|p=289}} Merged with the [[Republican People's Party]] in 1995.{{sfn|Lamb|Docherty|2006|p=289}}
|-
|[[Social Democratic Populist Party (Turkey)|Social Democratic Populist Party]]|| SHP || Admitted as consultative member in 1986.<ref name="xvii" /> Promoted to full member in 1989.<ref name="xviii" /> Merged with the [[Republican People's Party]] in 1995.
|-
 || {{UKR}}||[[Socialist Party of Ukraine]]|| SPU || Admitted as consultative member in 2003.<ref name="xxii" /> Expelled in July 2011.<ref>[http://www.pravda.com.ua/news/2011/07/3/6352402/ Партію Мороза виключили з Соцінтерну], ''[[Ukrayinska Pravda]]'', 03, July 2011</ref>
|-
| rowspan="3" |{{USA}}
|[[Democratic Socialists of America]]
|DSA
|Had been a member of SI since founding in 1982, withdrew in August 2017.<ref name=":1">{{cite web|url=http://www.leftvoice.org/DSA-Votes-for-BDS-Reparations-and-Out-of-the-Socialist-International|title=DSA Votes for BDS, Reparations, and Out of the Socialist International|first=Juan Cruz|last=Ferre|date=5 August 2017|access-date=7 August 2017}}</ref>
|-
|[[Democratic Socialist Organizing Committee|Democratic Socialists Organizing Committee]]
|DSOC
|Member since 1976,<ref>{{Cite book |last=Harrington |first=Michael |title=The long-distance runner: an autobiography |date=January 1, 1988 |publisher=Holt |isbn=978-0-8050-0790-9 |edition=1st |location=New York, N.Y |pages=151–153}}</ref> merged with the New American Movement in 1982 to form the Democratic Socialists of America, which remained a member until 2011.<ref name=":1" />
|-
|[[Social Democrats, USA]]{{sfn|Lamb|Docherty|2006|p=316}}|| SDUSA || Member since 1972.{{sfn|Lamb|Docherty|2006|p=316}} Withdrew in 2005.
|-
 | rowspan="2"| {{URY}}||[[Party for the Government of the People]]|| PGP || Admitted as consultative member in 1992.<ref name="xix" /> Merged with the [[Colorado Party (Uruguay)|Colorado Party]] in 1994.
|-
|[[Socialist Party of Uruguay]]{{sfn|Lamb|Docherty|2006|p=327}}|| PSUA || Admitted as full member in 1999.<ref name="xxi" />{{sfn|Lamb|Docherty|2006|p=327}} Withdrew in 2017.<ref>[https://www.elobservador.com.uy/nota/internacional-socialista-se-reunio-en-uruguay-con-preocupacion-por-lo-que-ocurra-en-venezuela-2018518500 Internacional Socialista se reunió en Uruguay con preocupacion por lo que ocurra en Venezuela] - El Observador, 18 May 2018</ref>
|-
 | rowspan="2"| {{VEN}}||[[For Social Democracy]]|| PODEMOS || Admitted as consultative member in 2008.<ref name="xxiii" />
|-
|[[Movement for Socialism (Venezuela)|Movement for Socialism]]
|MAS|| Admitted as consultative member in 2003.<ref name="xxii" />
|-
|{{ZAM}}
|[[Patriotic Front (Zambia)|Patriotic Front]]
|PF|| Admitted as consultative member in 2013.<ref name="feb2013" />
|-
 ||{{ZIM}}||[[Movement for Democratic Change – Tsvangirai|Movement for Democratic Change]]|| MDC || Admitted as full member in 2008.<ref name="xxiii" /> Delisted in 2017.
|}

==Fraternal organisations==
* [[International Falcon Movement – Socialist Educational International]]{{sfn|Lamb|Docherty|2006|p=170}}
* [[Socialist International Women]]<ref>{{cite web |title=Socialist International Women|date=22 January 2024 |url=http://www.socintwomen.org.uk/en/|publisher=[[Socialist International Women]]}}</ref>

==Associated organisations==
{{columns-list |colwidth=15em|
* Arab Social Democratic Forum, ASDF
* Euro-Latin American Forum of Progressive and Socialist Parliamentarians
* International Federation of the Socialist and Democratic Press{{sfn|Lamb|Docherty|2006|p=170}}
* [[International Jewish Labor Bund]]{{sfn|Lamb|Docherty|2006|p=173}}
* International Labour Sports Confederation{{sfn|Lamb|Docherty|2006|p=173}}
* [[International League of Religious Socialists]]{{sfn|Lamb|Docherty|2006|p=174}}<ref name=xx/><ref>{{cite web|title=What is the ILRS?|url=http://ilrs.org/english/intro.html|publisher=[[International League of Religious Socialists]]}}</ref>
* International Social Democratic Union for Education{{sfn|Lamb|Docherty|2006|p=174}}
* World Labour Zionist Movement, WLZM
* [[National Democratic Institute]]<ref>{{cite web|title=Political Parties|url=http://www.ndi.org/content/political_parties-ww|publisher=[[National Democratic Institute]]|url-status=dead|archive-url=https://web.archive.org/web/20110116024535/http://www.ndi.org/content/political_parties-ww|archive-date=16 January 2011}}</ref>
* [[Party of European Socialists]]{{sfn|Lamb|Docherty|2006|p=267}}
* Social Democratic Group of the [[Latin American Parliament]]
}}

==See also==
{{Portal|Socialism}}
* [[French Section of the Workers' International]]
* [[Reformism]]

:;Left-wing Internationals
Chronologically by ideology:
;United left wing
* [[International Workingmen's Association]], the First International (1864–1876)

;Anarchist
* [[International Anarchist Congresses]]: at first with the 1st International; followed by:
** [[International Working People's Association]], sometimes known as the "Black" International (1881-1887); anarchist
** [[International Workers' Association – Asociación Internacional de los Trabajadores|International Workers' Association]] – Asociación Internacional de los Trabajadores [[IWA–AIT]] (est. 1922) and the [[International of Anarchist Federations]] (IFA; est. 1968), with several spin-offs: [[Libertarian Communist International]] (est. 1954), [[Anarchist International Conference]] (est. 1958), [[International Libertarian Solidarity ]](SIL/ILS) network (est. 2001)

;Socialist & labour
* [[Second International]] (1889–1916), socialist and labour
* [[Berne International]] (est. 1919), socialist
* [[International Working Union of Socialist Parties]] (IWUSP), aka 2½ International or Vienna International, founded by [[Austromarxism|Austro-Marxists]] (1921-1923)
* [[Labour and Socialist International]] (1923-1940), created by merger of Vienna and Berne Internationals

;Communist
* [[Communist International]], aka Third International or Comintern (1919-1943)

;Trotskyist
* [[Fourth International]] (1938-1953 schism) led by the International Secretariat (ISFI); followed by [[List of Trotskyist internationals|Trotskyist internationals]].
*[[Fourth International (post-reunification)]] (since 1963), by reunification of ISFI and parts of the [[International Committee of the Fourth International]] (ICFI)

;Democratic socialism
* Socialist International (est. 1951)

;Reunification efforts
* [[Fifth International]], phrase referring to socialist and communist groups aspiring to create a new workers' international

==Notes==
{{reflist|30em}}

==References==
{{refbegin}}
* {{cite book|title=Historical Dictionary of Socialism|year=2006|publisher=[[Rowman & Littlefield#Imprints|The Scarecrow Press]]|isbn=978-0-8108-5560-1|url=https://www.scribd.com/doc/34254398/Docherty-Historical-Dictionary-of-Socialism|first1=Peter|last1=Lamb|edition=Second|first2=James C.|last2=Docherty|access-date=12 September 2017|archive-date=23 February 2014|archive-url=https://web.archive.org/web/20140223115609/http://www.scribd.com/doc/34254398/Docherty-Historical-Dictionary-of-Socialism|url-status=dead}}
{{refend}}

==Further reading==
* [https://archive.org/details/TheSocialistInternational ''The Socialist International'' by Nikolai Sibilev, 1984.]
* [https://archive.org/details/SocialDemocracyAndSouthernAfrica ''Social Democracy and Southern Africa'' by Vladimir Shubin (pseudonym of Vladimir Bushin), 1989.]
* Julius Braunthal, "The Rebirth of Social Democracy," ''Foreign Affairs,'' vol. 27, no. 4 (July 1949), pp.&nbsp;586–600. [https://www.jstor.org/stable/20030209 In JSTOR]
* Pentti Vaananen, ''The Rose and the Fist,'' SYS Print, 2014, pp.&nbsp;50–230. {{ISBN|978-952-93-3706-4}}

==External links==
* {{official website}}

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[[Category:Socialist International| ]]
[[Category:History of socialism]]
[[Category:Organisations based in the London Borough of Lambeth]]
[[Category:Political parties established in 1951]]
[[Category:Political organisations based in London]]
[[Category:Social democracy]]
[[Category:Democratic socialism]]
[[Category:International socialist organizations]]

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[[Category:1951 establishments in West Germany]]