Chapman codes are a set of 3-letter codes used in genealogy to identify the administrative divisions in the United Kingdom, Ireland, the Isle of Man and the Channel Islands.

Use[edit]

They were created by the historian, Dr. Colin R Chapman, in the late 1970s, and as intended, provide a widely used shorthand in genealogy which follows the common practice of describing areas in terms of the counties existing in the 19th and 20th centuries.

Other uses[edit]

Chapman codes have no mapping, postal or administrative use. They can however be useful for disambiguation by postal services where a full county name or traditional abbreviation is not supplied after a place name which has more than one occurrence, a particular problem where these are post towns such as Richmond.

Country codes[edit]

Channel Islands[edit]

England[edit]

Historic counties[edit]

Administrative areas[edit]

Scotland[edit]

Historic counties[edit]

1975–1996 regions[edit]

Wales[edit]

Historic counties[edit]

1974–1996[edit]

Northern Ireland[edit]

Ireland[edit]

See also[edit]

• Historic counties of England
• Historic counties of Scotland
• Historic counties of Wales
• Counties of Northern Ireland

References[edit]

• The Chapman County Code for British Isles Counties, Lochin Publishing, accessed 13 October 2019