Twin cities

This article is about the general concept of "twin cities". For the area typically called the "Twin Cities" in the United States, see Minneapolis – Saint Paul. For other uses, see Twin city (disambiguation).

Twin cities are a special case of two cities or urban centres which are founded in close geographic proximity and then grow into each other over time. The term Twin Cities in the United States refers specifically to the cities Minneapolis and Saint Paul, both of which are in the midwestern state of Minnesota.

Cities twinned geographically do not necessarily match demographically, economically, or politically.

In most cases, cities that grow into each other's space in this way lose their individual identities, and whatever border or barrier still separates them becomes irrelevant as they fuse into one new city. One famous example of this is Budapest in Hungary, which began as two settlements (Buda and Pest) facing each other across the Danube at a strategic fording place along a trade route. However, there are twin cities which have been able to resist this final union and have maintained individual identity against the tides of history, economics and demographics.

Twin cities often share an airport, into whose airport codes are integrated the initials of both cities; DFW (Dallas-Fort Worth), MSP (Minneapolis-St. Paul), and RDU (Raleigh-Durham) are examples.

In some cases, such as Albury/Wodonga in Australia, the two cities are permanently divided by a state border, often one that strictly adheres to a geographical landmark, such as the Murray River that divides New South Wales from Victoria, and thus Albury from Wodonga.

Examples

A remarkable example of twin cities: Plaza Internacional of the Frontera de la Paz. On the left, Santana do Livramento (Brazil); on the right, Rivera (Uruguay).

Asia

• Dhaka and Gazipur, Bangladesh
• Tel Aviv and Jaffa, Israel
• Islamabad and Rawalpindi, Pakistan
• Jhelum and Sarai Alamgir, Pakistan
• Guangzhou and Foshan, People's Republic of China
• Hong Kong and Shenzhen, People's Republic of China
• Macau and Zhuhai, People's Republic of China
• Dipolog and Dapitan, Philippines
• Taipei and New Taipei, Republic of China (Taiwan)
• Dammam and Khobar, Saudi Arabia
• Johor Bahru, Malaysia and Singapore
• Seoul and Incheon, South Korea
• Bangkok and Nonthaburi, Thailand
• Chiang Mai and Lamphun, Thailand
• Songkhla and Hatyai, Thailand
• Ramallah and al-Bireh, in the West Bank

India

• Ahmedabad and Gandhinagar, Gujarat, are looked upon as merging into a new twin city in-the-process.
• Bhubaneswar and Cuttack, Orissa
• Chandigarh, Panchkula and Mohali, Punjab
• Hubli and Dharwad, Karnataka
• Hyderabad and Secunderabad, Andhra Pradesh
• Kochi, also called Fort Kochi or Cochin and Ernakulam, Kerala
• Kolkata and Howrah, West Bengal
• Mandla and Balaghat, Madhya Pradesh
• Mumbai, Navi Mumbai and Thane, Maharashtra
• Pune and Pimpri-Chinchwad, Maharashtra
• Surat and Navsari, Gujarat, are in the process of merging and will be completed by 2015.
• Sangli and Miraj
• Tirunelveli and Palayamkottai, Tamil Nadu
• Udhana and Sachin, Gujarat, Gujarat, are one of the first Twin Cities in India
• Warangal and Hanamakonda, Andhra Pradesh
• Durg and Bhilai, Chhattisgarh
• Siliguri and Jalpaiguri, West Bengal
• Ranchi and Hatia, Jharkhand
• Lucknow and Kanpur,Uttar Pradesh
• Ghaziabad and Noida,Uttar Pradesh,

Europe

• Vienna, Austria and Bratislava, Slovakia (being only 60 km apart, these are also the two national capitals with the least distance between them, except for the special case of Rome and Vatican City)
• Gornja Radgona, Slovenia and Bad Radkersburg, Austria
• Aalborg and Nørresundby, Denmark
• Brighton and Hove, England
• Chatham and Rochester, England "it's a wise man who knows where Chatham ends and Rochester begins." Charles Dickens
• City of London and City of Westminster, England. Both were absorbed into Greater London in 1965.
• Leeds and Bradford, England
• Manchester and Salford, England
• Newcastle-upon-Tyne and Gateshead, England
• Sheffield and Rotherham, England
• Valka, Latvia and Valga, Estonia
• Ludwigshafen and Mannheim, Germany
• Mainz and Wiesbaden, Germany
• Ulm and Neu-Ulm, Germany
• Zgorzelec, Poland and Görlitz, Germany
• Buda and Pest, Hungary
• Komárno, Slovakia and Komárom, Hungary
• Fredrikstad and Sarpsborg, Norway
• Porsgrunn and Skien, Norway
• Sandnes and Stavanger, Norway
• Bielsko and Biała, Poland
• Těšín, Czech Republic and Cieszyn, Poland
• Porto and Vila Nova de Gaia, Portugal
• Gorizia, Italy and Nova Gorica, Slovenia
• Alcobendas and San Sebastian de los Reyes in Madrid, Spain
• Copenhagen, Denmark and Malmö, Sweden, often referred to as twin cities, as part of the Öresund Region, divided by the Øresund strait.
• Göteborg and Mölndal, Sweden
• Tornio, Finland and Haparanda, Sweden

North America

• Minneapolis and Saint Paul, Minnesota, popularly known as the "Twin Cities" in North America
• San Francisco and Oakland, California, together with San Jose, California are the major cities of the San Francisco Bay Area metropolitan region
• San Diego, California in the United States and Tijuana, Baja California in Mexico
• Baltimore, Maryland and Washington, D.C. as part of the Baltimore–Washington Metropolitan Area, a megalopolis with many other component cities and towns, including many in Virginia.
• Dallas, and Fort Worth, Texas, the main cities of the Dallas–Fort Worth Metroplex, a megalopolis in northeastern Texas.
• Raleigh and Durham, North Carolina, the two main cities of the three-city Research Triangle area.
• Detroit, Michigan and Windsor, Ontario
• Tampa and St. Petersburg, Florida, the two largest cities of the Tampa Bay Area
• San Bernardino and Riverside, California, the central cities of the area popularly known as the Inland Empire.
• Halifax, Nova Scotia and Dartmouth, Nova Scotia. Even though both cities were merged into the Halifax Regional Municipality they are geographically separated by Halifax Harbour and still retain separate identities.
• Scranton and Wilkes-Barre, Pennsylvania, the core cities of the Wyoming Valley in northeastern Pennsylvania
• Kitchener and Waterloo, Ontario
• Ottawa, Ontario and Gatineau, Quebec form the National Capital Region, geopolitically separated by the Ottawa River.
• Veracruz, Veracruz and Boca del Río, Veracruz
• Philadelphia and Camden, New Jersey

South America

• Carmen de Patagones and Viedma, Argentina
• Santa Fe and Paraná, Entre Ríos, Argentina
• Aparecida and Guaratinguetá, Brazil
• Chuí, Brazil and Chuy, Uruguay
• Cuiabá and Várzea Grande, Mato Grosso, Brazil
• Florianópolis and São José, Santa Catarina, Brazil
• Ilhéus and Itabuna, Brazil
• Juazeiro and Petrolina, Brazil
• Teresina, Piauí and Timon, Maranhão, Brazil
• Recife and Olinda, Brazil
• Rivera, Uruguay and Santana do Livramento, Brazil
• Vitória and Vila Velha, Brazil
• Concepción and Talcahuano, Chile
• La Serena, Chile and Coquimbo, Chile
• Valparaiso and Viña del Mar, Chile
• Barranquilla and Soledad, Atlántico, Colombia
• Leticia, Colombia and Tabatinga, Brazil
• Lima and Callao, Peru

Australia

• Albury and Wodonga
• Canberra and Queanbeyan
• Coolangatta and Tweed Heads
• Forster and Tuncurry
• Harden and Murrumburrah

Africa

• Rabat and Salé, Morocco.
• Fes and Meknes, Morocco
• Kinshasa, capital of Congo DR and Brazzaville, capital of Republic of the Congo
• Cairo and Giza, Egypt
• Harar and Dire Dawa, Ethiopia

Fictional twin cities

• Gotham City (the home of Batman) and Metropolis (the home of Superman) have sometimes been presented as twin cities, mainly in 1970s and 1980s stories by DC Comics. The two cities were shown as located on opposite sides of a large bay.
• Central City and Keystone City, from the current Flash comics, are shown as twin cities; earlier comics presented each city as located in the same space but on different parallel Earths.
• Ankh-Morpork, from Terry Pratchett's Discworld novels, is referred to as "the twin cities of proud Ankh and pestilent Morpork"
• Duckburg and St. Canard were depicted in the cartoon Darkwing Duck as sister cities connected by a bridge, very similar to Oakland and San Francisco.

Tri-Cities

United States

• In Iowa: Cedar Rapids, Marion and Hiawatha
• The Tri-Cities, Washington, consisting of Richland, Pasco, and Kennewick, Washington, along the banks of the Columbia River
• The Tri-Cities, Tennessee, Tennessee and Virginia, consisting of the twin cities of Bristol, Tennessee/Bristol, Virginia, Kingsport, and Johnson City
• The Research Triangle in North Carolina, consisting of Raleigh, Durham, and Chapel Hill.
• The Golden Triangle in Texas, consisting of Beaumont, Port Arthur, and Orange.
• The Piedmont Triad in North Carolina, consisting of Greensboro, Winston-Salem (itself a merged city), and High Point.
• The Tri-Cities in Michigan, consisting of Bay City, Saginaw, and Midland in the Saginaw Valley
• In Illinois and Iowa: three of the four Quad Cities—Moline and Rock Island in Illinois and Davenport in Iowa—were formerly known as the Tri-Cities, before the inclusion of East Moline, Illinois and later, Bettendorf, Iowa
• In Kane County, Illinois, the county seat of Geneva and the nearby cities of Batavia, and St. Charles,
• The Capital District in New York, consisting of Albany, Schenectady, and Troy
• In Colorado: the towns of Firestone, Frederick, and Dacono (known as the "tri-towns")
• In Nebraska:
  • in the south-central part of the state, Grand Island, Kearney, and Hastings
  • in the panhandle, western part of the state, Gering, Scottsbluff and Terrytown are border to border
• Tri-Cities, Virginia, consisting of Petersburg, Colonial Heights, and Hopewell in the Greater Richmond Region
• In New Hampshire: Dover, Somersworth, and Rochester in the Seacoast Region
• In Florida:
  • In the southeast of the state, South Florida, consisting of the anchor cities of Miami, Fort Lauderdale, and West Palm Beach. This region is sometimes referred to as the tri-county area (Dade, Broward, and Palm Beach counties)
  • On the Gulf of Mexico Coast, the Tampa Bay Area, consisting of Tampa, Clearwater, and St. Petersburg
• In Oklahoma: Tuttle, Newcastle, and Blanchard (sometimes with the town of Bridge Creek)
• In California:
  • The San Francisco Bay Area, anchored by the cities of San Francisco, Oakland and San Jose.
  • In Alameda County: Fremont, Newark, and Union City are referred to as the Tri-City Area.
  • In Santa Barbara County: Santa Barbara, Goleta, and Carpinteria, sometimes referred collectively as the South Coast. The term 'tri-cities' is only rarely used as a reference to them, and is considered somewhat old.
  • In San Diego County: Oceanside, Vista, and Carlsbad are sometimes referred to as the tri-cities.
• The Triple Cities in New York: Binghamton, Endicott and Johnson City
• The Lehigh Valley in Pennsylvania: Allentown, Bethlehem, and Easton
• In Alabama: Huntsville, Decatur, and Athens

Canada

• Tri-Cities (British Columbia), consisting of Coquitlam, Port Coquitlam, and Port Moody, located in the north-eastern section of Metro Vancouver.
• Kitchener, Waterloo, and Cambridge, Ontario. (Cambridge, Ontario, itself is the "tri-city" amalgamation of the City of Galt, and the towns of Preston and Hespeler, and the hamlet of Blair in 1973.)

Mexico

• Torreón, Coahuila, Gómez Palacio and Lerdo, Durango — see also Comarca Lagunera
• Monterrey and San Nicolás de los Garza, Nuevo León
• Monterrey and San Pedro Garza García
• Monterrey and Guadalupe, Nuevo León
• Monterrey and Escobedo, Nuevo León
• Monterrey and Santa Catarina, Nuevo León
• Saltillo and Ramos Arizpe, Coahuila
• Piedras Negras, Coahuila and Eagle Pass, Texas
• Ciudad Acuña, Coahuila and Del Rio, Texas

Asia

• Arcot, Ranipet and Walajapet towns in Tamil Nadu
• Warangal in India, Andhra Pradesh consists of the towns of Warangal, Hanamakonda, and Kazipet.
• The second Tricity in North India consists of the towns of Chandigarh, Panchkula and SAS Nagar (Mohali).
• Tricity of Nepal consists of the cities of Baglung, Beni and Kusma along with several towns and villages along the Kali Gandaki valley.
• Dhahran, Dammam and Khobar in Saudi Arabia

South America

• Near Iguazu Falls: Foz do Iguaçu, Brazil, Ciudad del Este, Paraguay, and Puerto Iguazu, Argentina.

Europe

• The Tricity in Poland consists of Gdańsk, Gdynia and Sopot
• The cities of Oxford, Cambridge and London are sometimes considered as a tricity of scientific excellence connected by good rail or road connections.

Quad cities

• In Iowa: Iowa City, Coralville, University Heights and North Liberty
• In North Carolina, the Unifour: Hickory, Lenoir, Morganton and Alexander County
• The Quad Cities of Ontario, Canada include Kitchener, Waterloo, Cambridge, and Guelph, Ontario.
• Quad Cities of Davenport and Bettendorf, Iowa, and Rock Island and Moline, Illinois. It also includes a fifth member, East Moline, Illinois.
• The Florence-Muscle Shoals Metropolitan Area in Alabama is locally referred to as "the Quad Cities", with Florence, Muscle Shoals, Sheffield, and Tuscumbia. Formerly, when Muscle Shoals was a mere village, this region was known a "Tri-Cities", Alabama. Actually, they are all incorporated as towns except for Florence.
• The Quad Cities of Minnesota consist of Virginia, Eveleth, Gilbert, and Mountain Iron.
• Pattaya-Chonburi Metropolitan Area consists of the City of Pattaya, Town of Chonburi, Portal town of Laem Chabang and Town of Sattahip on the west coast of Chonburi Province, Thailand

Examples of cities formed by amalgamation

Asia

• Wuhan in China consists of the towns of Wuchang, Hankou, and Hanyang in Hubei Province
• Bangkok the capital and largest city of Thailand was created in 1971 when the previous Bangkok province (Phra Nakhon) was merged with Thonburi province.

Europe

• London grew from its cores in the City of London and the City of Westminster to encompass many other towns and villages.
• Budapest is the amalgamation of Buda, Pest and Óbuda.
• Berlin (Berlin and Cölln), in Germany
• Duisburg (Duisburg and Hamborn, 1929–1935 called Duisburg-Hamborn), in North Rhine-Westphalia, Germany
• Wuppertal (Barmen and Elberfeld), in North Rhine-Westphalia, Germany
• Zagreb grew from the twin towns of Gradec and Kaptol.
• Belgrade now includes the formerly separate city of Zemun.

North America

• Richmond (Richmond and Manchester) in central Virginia
• Cleveland (Cleveland and Ohio City) in Ohio
• Minneapolis. St. Anthony (not to be confused with St. Anthony Village, a modern city which is a suburb of Saint Paul) was a twin city to Minneapolis in the two cities' youth. Minneapolis annexed St. Anthony in the late 1800s.
• New York City (five boroughs, historically especially between Manhattan and Brooklyn)
• Fremont, California was formed in 1956 by the combination of the five towns of Centerville, Irvington, Niles, Mission San Jose, and Warm Springs, California. The town of Newark has always refused to merge into Fremont, and Newark is completely surrounded by Fremont.
• What is now the city of Winston-Salem, North Carolina was once two separate towns called Winston and Salem that were combined into one.
• Ottawa, Ontario, was given its large area by the amalgamation in 2001 of the old City of Ottawa, the suburbs of Nepean, Kanata, Gloucester, Rockcliffe Park, Vanier and Cumberland, Orleans, and the rural townships of West Carleton, Osgoode, Rideau, and Goulbourn
• Gatineau, Quebec, formed by the amalgamation of the old City of Gatineau, City of Hull, City of Aylmer, City of Buckingham and the Municipality of Masson-Angers all facing the City of Ottawa, Ontario from the north shore of the Ottawa River.
• Toronto formed by an amalgamation of the Old Toronto with East York, Etobicoke, North York, Scarborough and York, which were themselves products of earlier amalgamations.
• Thunder Bay, Ontario (Fort William and Port Arthur).
• Lloydminster, Canada, on the Saskatchewan-Alberta border, was formed as a single entity in 1903, when both future provinces were part of the Northwest Territories, but was divided into two separate entities in 1905 because the border between the newly created provinces bisected the community. In 1930, the two towns were reunited as a single town under the shared jurisdiction of both provinces, and Lloydminster was reincorporated as a single city in 1958.
• Halifax and Dartmouth (Canada) were forcibly merged in 1996 along with Bedford and Halifax County to create the Halifax Regional Municipality.
• Saguenay, Quebec (Chicoutimi, Jonquière, et al.)
• Seattle annexed the neighboring towns of West Seattle and Ballard.
• Lincoln City, Oregon was formed in 1965 by merging the extant seaside towns of Oceanlake, Delake, and Taft, with the adjoining unincorporated areas of Nelscott and Cutler City.
• Pittsburgh annexed Allegheny City, which is now the quarter of the city that lies north of the Allegheny and Ohio rivers. Also annexed was Birmingham, now referred to as the "South Side".
• Ciudad Guayana, Venezuela, officially founded in 1961 is actually composed of the old town of San Félix at the east and the new modern planned town of Puerto Ordaz at the west of Caroní river in Bolívar state.
• Bethlehem, Pennsylvania, which absorbed the cities of South Bethlehem, and West Bethlehem. The former Bethlehem and South Bethlehem are situated in Northampton County, Pennsylvania, and West Bethlehem is in Lehigh County. As a result, present-day Bethlehem straddles the county line.
• Montreal, Quebec, was merged with the other 27 communities on the Island of Montreal by an act in the Quebec Parliament in 2002. Several communities later voted via referendum to de-merge and there are now a total of 15, leaving Montreal merged with the other 12.
• Kingston, Ontario was amalgamated in 1998 with the neighboring Kingston and Pittsburgh Townships.
• Winnipeg, Manitoba, in 1971 was the first major North American city to be amalgamated in what was known as Unicity. The centralized city of Winnipeg was merged with all of its suburbs (12 other communities and municipalities), more than doubling its population. See also Subdivisions of Winnipeg#Unicity
• Helena-West Helena, Arkansas was formed in 2006 by the merger of the previous cities of Helena and West Helena.
• Greater Sudbury, Ontario, was formed in 2001 by the amalgamation of the former Regional Municipality of Sudbury, comprising the municipalites of Sudbury, Nickel Centre, Valley East, Capreol, Rayside-Balfour, Onaping Falls and Walden, plus a number of previously unamalgamated townships. The amalgamation made it the most populous city in the Northern Ontario region.

See also

• Divided cities
• United cities
• Cross-border town naming
• Megacity
• Sister cities
• List of metropolitan areas that overlap multiple countries
• List of twin towns and sister cities
• Global city
• Ecumenopolis
• Metropolis
• Megalopolis