|Location||England and Wales and Ireland|
|Created by|| Local Government Act 1888 |
Local Government (Ireland) Act 1898
An administrative county was a first-level administrative division in England and Wales from 1888 to 1974, and in Ireland from 1899 until either 1973 (in Northern Ireland) or 2002 (in the Republic of Ireland). They are now abolished, although most Northern Ireland lieutenancy areas and Republic of Ireland counties have the same boundaries as former administrative countries.
The term was introduced for England and Wales by the Local Government Act 1888, which created county councils for various areas, and called them 'administrative counties' to distinguish them from the continuing statutory counties.
In England and Wales the legislation was repealed in 1974, and entities called 'metropolitan and non-metropolitan counties' in England and 'counties' in Wales were introduced in their place. Though strictly inaccurate, these are often called 'administrative counties' to distinguish them from both the historic counties, and the ceremonial counties.
For local government purposes Scottish counties were replaced in 1975 with a system of regions and island council areas.
The Local Government (Ireland) Act 1898 created administrative counties in Ireland on the same model that had been used in England and Wales.
In Northern Ireland the administrative counties were replaced by a system of 26 districts on 1 October 1973. Section 131 of the Local Government Act (Northern Ireland) 1972 stated that "every county and every county borough shall cease to be an administrative area for local government purposes". 
The areas of the former administrative counties (and county boroughs) remain in use for Lieutenancy purposes, being defined as the areas used "for local government purposes immediately before 1 October 1973, subject to any subsequent definition of their boundaries …". 
In the Republic of Ireland the legislation that created them remained in force until 1 January 2002, when they were renamed as "counties" under the Local Government Act 2001. 
The administrative counties that did not share the names of previous counties:
|Cambridgeshire||Isle of Ely|
|Hampshire||Isle of Wight|
|Lincolnshire||Holland, Kesteven, Lindsey|
|Northamptonshire||Soke of Peterborough|
|Suffolk||East Suffolk, West Suffolk|
|Sussex||East Sussex, West Sussex|
|Yorkshire||East Riding, North Riding, West Riding|
Republic of Ireland
A borough is an administrative division in various English-speaking countries. In principle, the term borough designates a self-governing walled town, although in practice, official use of the term varies widely.
The counties of Ireland are historic administrative divisions of the island into thirty-two units. They began as Norman structures, and as the powers exercised by the Cambro-Norman barons and the Old English nobility waned over time, new offices of political control came to be established at a county level.
A lord-lieutenant is the British monarch's personal representative in each lieutenancy area of the United Kingdom. Historically, each lieutenant was responsible for organising the county's militia. In 1871, the lieutenant's responsibility over the local militia was removed. However, it was not until 1921 that they formally lost the right to call upon able-bodied men to fight when needed.
The administrative geography of the United Kingdom is complex, multi-layered and non-uniform. The United Kingdom, a sovereign state to the northwest of continental Europe, consists of England, Northern Ireland, Scotland and Wales. For local government in the United Kingdom, England, Northern Ireland, Scotland and Wales each have their own system of administrative and geographic demarcation. Consequently, there is "no common stratum of administrative unit encompassing the United Kingdom".
The historic counties of Wales are sub-divisions of Wales. They were used for various functions for several hundred years, but for administrative purposes have been superseded by contemporary sub-national divisions, some of which bear some limited similarity to the historic entities in name and extent. They are alternatively known as ancient counties.
The counties of England are areas used for different purposes, which include administrative, geographical, cultural and political demarcation. The term "county" is defined in several ways and can apply to similar or the same areas used by each of these demarcation structures. These different types of county each have a more formal name but are commonly referred to as just "counties". The current arrangement is the result of incremental reform.
The counties and areas for the purposes of the lieutenancies, also referred to as the lieutenancy areas of England and informally known as ceremonial counties, are areas of England to which lords-lieutenant are appointed. Legally, the areas in England, as well as in Wales and Scotland, are defined by the Lieutenancies Act 1997 as "counties and areas for the purposes of the lieutenancies in Great Britain", in contrast to the areas used for local government. They are also informally known as "geographic counties", to distinguish them from other types of counties of England.
County borough is a term introduced in 1889 in the United Kingdom of Great Britain and Ireland, to refer to a borough or a city independent of county council control, similar to the unitary authorities created since the 1990s. An equivalent term used in Scotland was a county of city. They were abolished by the Local Government Act 1972 in England and Wales, but continue in use for lieutenancy and shrievalty in Northern Ireland. In the Republic of Ireland they remain in existence but have been renamed cities under the provisions of the Local Government Act 2001. The Local Government (Wales) Act 1994 re-introduced the term for certain "principal areas" in Wales. Scotland did not have county boroughs but instead had counties of cities. These were abolished on 16 May 1975. All four Scottish cities of the time—Aberdeen, Dundee, Edinburgh, and Glasgow—were included in this category. There was an additional category of large burgh in the Scottish system, which were responsible for all services apart from police, education and fire.
Northern Ireland is divided into 11 districts for local government purposes. In Northern Ireland, local councils do not carry out the same range of functions as those in the rest of the United Kingdom; for example they have no responsibility for education, road-building or housing. Their functions include planning, waste and recycling services, leisure and community services, building control and local economic and cultural development. The collection of rates is handled centrally by the Land and Property Services agency of the Northern Ireland Executive.
Dún Laoghaire–Rathdown is a county in Ireland. It is in the province of Leinster and the Eastern and Midland Region. It is one of three successor counties to County Dublin, which was disestablished in 1994. It is named after the former borough of Dún Laoghaire and the barony of Rathdown. Dún Laoghaire–Rathdown County Council is the local authority for the county. The population of the county was 218,018 at the time of the 2016 census.
The Local Government (Ireland) Act 1898 was an Act of the Parliament of the United Kingdom of Great Britain and Ireland that established a system of local government in Ireland similar to that already created for England, Wales and Scotland by legislation in 1888 and 1889. The Act effectively ended landlord control of local government in Ireland.
Rural districts were a type of local government area – now superseded – established at the end of the 19th century in England, Wales, and Ireland for the administration of predominantly rural areas at a level lower than that of the administrative counties.
A county council is the elected administrative body governing an area known as a county. This term has slightly different meanings in different countries.
Municipal boroughs were a type of local government district which existed in England and Wales between 1835 and 1974, in Northern Ireland from 1840 to 1973 and in the Republic of Ireland from 1840 to 2002. Broadly similar structures existed in Scotland from 1833 to 1975 with the reform of royal burghs and creation of police burghs.
The counties of the United Kingdom are subnational divisions of the United Kingdom, used for the purposes of administrative, geographical and political demarcation. The older term, shire is historically equivalent to county. By the Middle Ages, county had become established as the unit of local government, at least in England. By the early 17th century, all of England, Wales, Scotland, and Ireland had been separated into counties. In Scotland shire was the only term used until after the Act of Union 1707.
The Lieutenancies Act 1997 is an Act of Parliament in the United Kingdom that defines areas that lord-lieutenants are appointed to in Great Britain. It came into force on 1 July 1997.
Administrative counties were a unit of local government created by an Act of the Parliament of the United Kingdom for use in Ireland in 1899. Following the separation of the Irish Free State from the United Kingdom of Great Britain and Ireland, administrative counties continued in use in the two parts of the island of Ireland under their respective sovereign jurisdictions. They continued in use until 1973 in Northern Ireland and until 2002 in the Republic of Ireland.
The Local Government (Scotland) Act 1973 is an Act of Parliament of the United Kingdom that altered local government in Scotland on 16 May 1975.
Northern Ireland is divided into six counties, namely: Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone. Six largely rural administrative counties based on these were among the eight primary local government areas of Northern Ireland from its 1921 creation until 1973. The other two local government areas were the urban county boroughs of Derry and Belfast.