Chapman code

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3-letter codes used in genealogy

title: "Chapman code" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["geocodes", "british-genealogy", "irish-genealogy"] description: "3-letter codes used in genealogy" topic_path: "geography/united-kingdom" source: "https://en.wikipedia.org/wiki/Chapman_code" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary 3-letter codes used in genealogy ::

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

They were created by the historian Colin R Chapman in the late 1970s, intended to 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

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

Channel Islands

England

Historic counties

Administrative areas

Scotland

Historic counties

1975–1996 regions

Wales

Historic counties

1974–1996

Northern Ireland

Ireland

References

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

geocodesbritish-genealogyirish-genealogy