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A county is a geographical region of a country used for administrative or other purposes  in certain modern nations. Its etymology derives from the Old French term, conté or cunté and could denote a jurisdiction in mainland Europe, under the sovereignty of a count (earl) or a viscount. The modern French is comté, and its equivalents in other languages are contea, contado, comtat, condado, Grafschaft, Gau, etc.) (cf. conte, comte, conde, Graf).
When the Normans conquered England, they brought the term with them. The Saxons had already established the regions that became the Historic counties of England calling them shires (many county names derive from the name of the county town with the word "shire" added on: for example, Gloucester, in Gloucestershire; Worcester, in Worcestershire). The Vikings introduced the term earl (from Old Norse, jarl) to the British Isles. Thus, "earl" and "earldom" were taken as equivalent to the continental use of "count" and "county". So, the later-imported term became a synonym for the native English word scir ([ʃiːr]) or, in Modern English, shire. Since a shire was an administrative division of the kingdom, the term "county" evolved to designate an administrative division of national government in most modern uses.
A county may be further subdivided into hundreds, townships or other administrative jurisdictions under the county's control. The boundaries of a county usually, but not always, contain cities, villages, towns, townships or other municipal corporations. Depending on the particular nation, municipalities might or might not be subject to direct or indirect county control.
Outside the Anglophone community of nations, the term "county" is often used to describe sub-national jurisdictions that are structurally equivalent to counties in the relationship they have with their national government; but which may or may not be operationally equivalent to the county as that entity is known in predominantly English-speaking countries.
Five of the ten Canadian provinces use county as a regional subdivision. These include all four original provinces, New Brunswick, Nova Scotia, Ontario, and Quebec, and the seventh province, Prince Edward Island. In addition to counties, Ontario is also subdivided into territorial districts, district municipalities, metropolitan municipalities, and regional municipalities. In Alberta, the county used to be a type of municipal status; but this was changed to "municipal district" under the Municipal Government Act, when the County Act was repealed in the mid-1990s, at which time they were also permitted to retain the usage of county in their official names.
China, People's Republic of 
The word "county" is used to translate the Chinese term xiàn (县 or 縣). In Mainland China, governed by the People's Republic of China (PRC), counties are the third level of local government, coming under both the province level and the prefecture level.
There are 1,464 counties in the PRC out of a total of 2,862 county-level divisions. The number of counties has remained more or less constant since the Han Dynasty (206 BC–AD 220). The county remains one of the oldest levels of government in China and significantly predates the establishment of provinces in the Yuan Dynasty (1279–1368). The county government was particularly important in imperial China because this was the lowest layer at which the imperial government functioned. The head of a county during imperial times was the magistrate.
In older context, "prefecture" and "district" are alternative terms to refer to xiàn before the establishment of the Republic of China (ROC). The English nomenclature "county" was adopted following the establishment of the ROC.
The counties were first introduced in 1662, replacing the 49 fiefs (len) in Denmark–Norway with the same number of counties. This number does not include the subdivisions of the Duchy of Schleswig, which was only under partial Danish control. The number of counties in Denmark (excluding Norway) had dropped to c. 20 by 1793. Following the reunification of South Jutland with Denmark in 1920, four counties replaced the Prussian Kreise. Aabenraa and Sønderborg County merged in 1932 and Skanderborg and Aarhus were separated in 1942. From 1942 to 1970, the number stayed at 22. The number was further decreased by the 1970 Danish municipal reform, leaving 14 counties plus two cities unconnected to the county structure; Copenhagen and Frederiksberg.
In 2003, Bornholm County merged with the local five municipalities, forming the Bornholm Regional Municipality. The remaining 13 counties were abolished on 1 January 2007 where they were replaced by five new regions. In the same reform, the number of municipalities was slashed from 270 to 98 and all municipalities now belong to a region.
A comté was a territory ruled by a count (comte) in medieval France. In modern France, the rough equivalent of a "county" as used in many English-speaking countries are arrondissements, though the term is usually translated as "district".
For the situation in Germany compare Kreise.
Each administrative district consists of an elected council and an executive, and whose duties are comparable to those of a county executive in the United States, supervising local government administration.
The administrative unit of Hungary is called megye (historically, they were also called vármegye, or comitatus in Latin), which can be translated with the word county. The 19 counties constitute the highest level of the administrative subdivisions of the country together with the capital city Budapest, although counties and the capital are grouped into seven statistical regions.
Counties are subdivided to municipalities, the two types of which are towns and villages, each one having their own elected mayor and council. 23 of the towns have the rights of a county although they do not form independent territorial units equal to counties. Municipalities are grouped within counties into subregions (kistérség in Hungarian), which have statistical and organizational functions only.
The vármegye was also the historic administrative unit in the Kingdom of Hungary, which included areas of present-day neighbouring countries of Hungary. Its Latin name (comitatus) is the equivalent of the French comté. Actual political and administrative role of counties changed much through history. Originally they were subdivisions of the royal administration, but from the 13th century A.D. they became self-governments of the nobles and kept this character until the 19th century when in turn they became modern local governments.
The provinces of Iran are further subdivided into counties called shahrestan (Persian: شهرستان shahrestān), an area inside an ostan, and consisting of a city centre, a few bakhsh (Persian: بخش bakhsh), and many villages around them. There are usually a few cities (Persian: شهر shahar) and rural agglomerations (Persian: دهستان dehestān) in each county. Rural agglomerations are a collection of a number of villages. One of the cities of the county is appointed as the capital of the county.
Each shahrestan has a government office known as Farmandari, which coordinates different events and government offices. The Farmandar, or the head of Farmandari, is the governor of the Shahrestan.
Fars Province has the highest number of Shahrestans, with 23, while Semnān and South Khorasan have only 4 Shahrestans each; Qom uniquely has one, being coextensive with its namesake county. Iran had 324 Shahrestans in 2005.
These counties are traditionally grouped into 4 provinces - Leinster (12), Munster (6) Connacht (5) and Ulster (9). Historically, the counties of Meath, Westmeath and small parts of surrounding counties constituted the province of Mide, which was one of the "Five Fifths" of Ireland (in the Irish language the word for province, Cuige, from Cuig, five means "a fifth"); however, these have long since become the three northernmost counties of Leinster province. In the Republic each county is administered by an elected "county council", and the old provincial divisions are merely traditional names with no political significance.
The number and boundaries of administrative counties in the Republic of Ireland were reformed in the 1990s. For example County Dublin was broken into three: Dún Laoghaire–Rathdown, Fingal, and South Dublin - the City of Dublin had existed for centuries before. In addition "County Tipperary" is actually two administrative counties, called North Tipperary and South Tipperary while the major urban centres Cork, Galway, Limerick, and Waterford have been separated from the town and rural areas of their counties. Thus, the Republic of Ireland now has thirty-four 'county-level' authorities, although the borders of the original twenty-six counties are still officially in place.
In Northern Ireland, the six county councils and the smaller town councils were abolished in 1973 and replaced by a single tier of local government. However, in the north as well as in the south, the traditional 32 counties and 4 provinces remain in common usage for many sporting, cultural and other purposes. County identity is heavily reinforced in the local culture by allegiances to county teams in Hurling and Gaelic football. Each GAA county has its own flag/colours (and often a nickname too), and county allegiances are taken quite seriously. See the counties of Ireland and the Gaelic Athletic Association.
In Italy the word county is not used; the administrative sub-division of a region is called provincia. Italian provinces are mainly named after their principal town and comprise several administrative subdivisions called comuni (communes). There are currently 110 provinces in Italy.
Liberia has 15 counties, each of which elects two senators to the Liberian Senate.
Apskritis (pl. apskritys) is the Lithuanian word for county. Since 1994 Lithuania has 10 counties; before 1950 it had 20. The only purpose with the county is an office of a state governor who shall conduct law and order in the county. See counties of Lithuania.
New Zealand 
After New Zealand abolished its provinces in 1876, a system of counties similar to other countries' systems was instituted, lasting until 1989. They had chairmen, not mayors as boroughs and cities had; many legislative provisions (such as burial and land subdivision control) were different for the counties.
During the second half of the 20th century, many counties received overflow population from nearby cities. The result was often a merger of the two into a "district" (e.g. Rotorua) or a change of name to "district' (e.g. Waimairi) or "city" (e.g. Manukau City).
The Local Government Act 1974 began the process of bringing urban, mixed, and rural councils into the same legislative framework. Substantial reorganisations under that Act resulted in the 1989 shake-up, which covered the country in (non-overlapping) cities and districts and abolished all the counties except for the Chatham Islands County, which survived under that name for a further 6 years but then became a "Territory" under the "Chatham Islands Council".
Norway is divided into 19 counties (sing. fylke, plur. fylke/fylker) since 1972. Up to that year Bergen was a separate county, but is today a municipality in the county of Hordaland. All counties form administrative entities called county municipalities (sing. fylkeskommune, plur. fylkeskommunar/fylkeskommuner), further subdivided into municipalities, (sing. kommune, plur. kommunar/kommuner). One county, Oslo, is not divided into municipalities, rather it is equivalent to the municipality of Oslo.
Each county has its own county council (fylkesting) whose representatives are elected every four years together with representatives to the municipal councils. The counties handle matters as high schools and local roads, and until 1 January 2002 hospitals as well. This responsibility was transferred to the state-run health authorities and health trusts, and there is a debate on the future of the county municipality as an administrative entity. Some people, and parties, such as the Conservative and Progress Party, call for the abolishment of the county municipalities once and for all, while others, including the Labour Party, merely want to merge some of them into larger regions.
A second-level administrative division in Poland is called a powiat. (This is a subdivision of a voivodeship, or province, and is further subdivided into gminas.) The term is often translated into English as county (or sometimes district).
The Romanian word for county, comitat, is not currently used for any Romanian administrative divisions.
The Swedish division into counties was established in 1634, and was based on an earlier division into Provinces. Sweden is today divided into 21 counties. At the county level there is a county administrative board led by a governor appointed by the central government of Sweden, as well as an elected county council that handles a separate set of issues, notably hospitals and public transportation for the municipalities within its borders.
Republic of China (Taiwan) 
County is the common English translation for the character 縣 that denotes the current first level political division in Taiwan and surrounding islands. However, provincial cities have the same level of authority as counties. Above county, there are special municipalities (in effect) and province (suspended) due to economical and political reasons.
United Kingdom 
The United Kingdom is divided into a number of metropolitan and non-metropolitan counties. There are also ceremonial counties which group small non-metropolitan counties into geographic areas broadly based on the historic counties of England. The metropolitan and non-metropolitan counties had replaced in 1974 a system of administrative counties and county boroughs which were introduced in 1889.
Most non-metropolitan counties in England are run by county councils and divided into non-metropolitan districts, each with its own council. Local authorities in the UK are usually responsible for running education, emergency services, planning, transport, social services, and a number of other functions.
In England, in the Anglo-Saxon period, Shires were established as areas used for the raising of taxes, and usually had a fortified town at their centre. These became known as the shire town or later the county town. In most cases, the shires were named after their shire town (for example Bedfordshire) however several exceptions exist, such as Cumberland, Norfolk and Suffolk. In several other cases, such as Buckinghamshire, the town which came to be accepted as the county town is different from that after which the shire is named. (See Toponymical list of counties of the United Kingdom)
The name 'county' was introduced by the Normans, and was derived from a Norman term for an area administered by a Count (lord). These Norman 'counties' were simply the Saxon shires, and kept their Saxon names. Several traditional counties, including Essex, Sussex and Kent, predate the unification of England by Alfred the Great, and originally existed as independent kingdoms.
In Northern Ireland, the six county councils, if not their counties, were abolished in 1973 and replaced by 26 local government districts. The traditional six counties remain in common everyday use for many cultural and other purposes.
The thirteen historic counties of Wales were fixed by Statute in 1539 (although counties such as Pembrokeshire date from 1138) and most of the shires of Scotland are of at least this age. In the Gaelic form, Scottish traditional county names are generally distinguished by the designation "siorramachd"- literally "sherrifdom" e.g. Siorramachd Earra-ghaidheal (County of Argyll). This term corresponding to the jurisdiction of the Sheriff in the Scottish legal system.
The county boundaries of England have changed little over time. In the mediæval period, a number of important cities were granted the status of counties in their own right, such as London, Bristol and Coventry, and numerous small exclaves such as Islandshire were created. The next major change occurred in 1844, when many of these exclaves were re-merged with their surrounding counties (for example Coventry was re-merged with Warwickshire).
In 1965 and 1974–1975, a major re-organisation of local government created in England and Wales several new administrative counties such as Hereford and Worcester and also created several new metropolitan counties which served large urban areas as a single administrative unit. In Scotland county-sized local government was replaced by larger regions, which lasted until 1996. Modern local government in Scotland, Wales, Northern Ireland and a large part of England is based on the concept of smaller unitary authorities (a system similar to that which the Redcliffe–Maud Report proposed for most of Britain in the 1960s).
United States 
As with the shires of Anglo-Saxon England, counties in U.S. states are administrative divisions of the state in which their boundaries are drawn. Where they exist, they are the intermediate tier of unitary state government, between the statewide tier and the immediately local government tier (typically a city, town or village). Counties are used in 48 of the 50 unitary states; the other two states (Connecticut and Rhode Island) have abolished their counties as functional entities, and Massachusetts is in the process of doing so. Of these remaining 48 states, 46 use the term "county" while Alaska and Louisiana use the terms "borough" and "parish", respectively, for analogous jurisdictions.
Depending on the individual state, counties or their equivalents may be administratively subdivided into townships, or towns in the New England states, New York, and Wisconsin. In these cases, the township is generally subordinate to the county, which is generally subordinate to the state. Michigan, since 1947, has distinguished between "townships" (not self-governing) and "charter townships" (self-governing). In most states, municipal corporations (i.e. cities, villages or towns) file their reports to the state through the county. In Virginia, however, all cities are independent and report directly to the commonwealth government; but notwithstanding they are not part of the county, they might operate as a county seat (e.g. the Independent City of Fairfax is the seat of Fairfax County, though it is not legally within Fairfax County). California has abolished its townships, though may general law cities continue to use the word "Town" as part of their name (e.g. "Town of Atherton" when it is, legally, the City of Atherton).
Louisiana has entities equivalent to counties called parishes. Alaska is divided into boroughs, which typically provide fewer local services than do most U.S. counties, as the state government furnishes many services directly. Some of Alaska's boroughs have merged geographical boundaries and administrative functions with their principal (and sometimes only) cities; these are known as unified city-boroughs and result in some of Alaska's cities ranking among the geographically largest "cities" in the world. Nevertheless, Alaska considers such entities to be boroughs, not cities. Alaska is also unique in that more than half the geographic area of the state is in the "Unorganized Borough", a legal entity in which the state also functions as the local government.
New York has a unique system where 57 of its 62 counties are independently-operated administrative divisions of the state, with normal county executive powers; while the remaining five are administrative divisions of the City of New York. These five are each called borough in context of City government – Manhattan, The Bronx, Queens, Brooklyn, and Staten Island (formerly Richmond); but are still called "county" where state function is involved, e.g., "New York County Courthouse", not "Manhattan". The county names correlate to the borough names as follows: New York County = Manhattan, Bronx County = The Bronx, Queens County = Queens, Kings County = Brooklyn, and Richmond County = Staten Island.
In two states and parts of a third, county government as such does not exist, and county refers to geographic regions or districts. In Connecticut, Rhode Island and parts of Massachusetts counties exist only to designate boundaries for such state-level functions as park districts (Connecticut) or judicial offices (Connecticut and Massachusetts). In states where county government is nonexistent or weak (e.g., New Hampshire, Vermont), town government may provide some or all of the local government services.
Most counties have a county seat, usually a city, where its administrative functions are centered. Exceptions include the nation's smallest county, Arlington County, Virginia, which contains no municipalities. In several instances throughout the nation, a municipality has merged with a county into one jurisdiction so the county seat is coextensive with the county. This is the case in the City and County of San Francisco, CA, and in the City and County of Philadelphia, PA. A similar arrangement is found in the "Metropolitan Government of Nashville and Davidson County" where the metropolis of Nashville has merged into the county of Davidson (but, other than Nashville, a few municipalities - such as Belle Meade - still exist with some administrative functions). Miami-Dade in south Florida is a unique example of the merger of some functionality resulting in a two tier arrangement of governmental authority and administrative responsibility. New York City is famously coextensive with five counties or boroughs: the Bronx (which is Bronx County), Brooklyn (Kings County), Manhattan (New York County), Queens (Queens County), and Staten Island (Richmond County). Braselton, Georgia is widely known for being in four counties : Jackson County, Barrow County, Gwinnett County, and Hall County. Some New England states use the term shire town to mean "county seat".
- The Chambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh
- The Oxford Dictionary of English Etymology, C. W. Onions (Ed.), 1966, Oxford University Press
- Vision of Britain  — Type details for ancient county. Retrieved 31 March 2012
- Etymology of the word county.
- Province of Alberta. "Transitional Provisions, Consequential Amendments, Repeal and Commencement (Municipal Government Act)". Retrieved 2010-11-17.
- "Amternes administration 1660-1970 (in Danish)". Dansk Center for Byhistorie.
- National Association of Counties (U.S.A.): Connecticut Counties
- National Association of Counties (U.S.A.): Rhode Island Counties
- National Association of Counties (U.S.A.): Massachusetts Counties
- Massachusetts League of Women Voters: Massachusetts Government: County Government