Counties of England are areas used for the purposes of administrative, geographical and political demarcation.
For administrative purposes, England outside Greater London and the Isles of Scilly is divided into 83 metropolitan and non-metropolitan counties. These counties may consist of a single district or be divided into several districts. As of April 2009, 27 of these counties are divided into districts and have a county council. Six of the counties, covering the major conurbations, are known as metropolitan counties, which do not have county councils, although some functions are organised on a county-wide basis by their districts (metropolitan boroughs) acting jointly.
All of England (including Greater London and the Isles of Scilly) is also divided into 48 ceremonial counties, which are also known as geographic counties. Most ceremonial counties correspond to a metropolitan or non-metropolitan county of the same name but often with reduced boundaries.
The current arrangement is the result of incremental reform. Many of the counties have their origins in the Middle Ages, although the larger counties of Yorkshire and Sussex lost many or all of their administrative functions centuries ago. The geographic counties which existed before the local government reforms of 1965 and 1974 are referred to as ancient counties or historic counties. From 1889 to 1974 areas with county councils were known as administrative counties, which excluded larger towns and cities known as county boroughs and included divisions of some geographic counties. From 1974 to 1996 the metropolitan and non-metropolitan counties, some of which were established only in 1974, corresponded directly with the ceremonial counties.
This is a list of the counties of the United Kingdom. The history of local government in the United Kingdom differs between England, Northern Ireland, Scotland and Wales, and the subnational divisions within these which have been called counties have varied over time and by purpose. The county has formed the upper tier of local government over much of the United Kingdom at one time or another, and has been used for a variety of other purposes, such as for Lord Lieutenants, land registration and postal delivery. This list is split by constituent country, time period and purpose.
Following changes to local government in some areas in the 1990s and 2009 creating unitary authorities, a number of districts, although forming part of a larger ceremonial county themselves form a non-metropolitan county. See Non-metropolitan county#List of non-metropolitan counties.