ONS Geography maintains files of definitive area names and codes for a wide range of geographies used in statistical production.
More information on the geographies can be found in the metadata that accompanies the download files and in the Beginner's Guide section of the website.
Names and codes files are in CSV or DBF format, with accompanying metadata in HTML format.
CSV and DBF files can be read in MS Excel format and all common database applications, HTML files can be displayed in any internet browser.
All products contain the new 9 character coding as well as the old style coding.
For further information please see the Code History Database.
Files can be downloaded free of charge.
Links to names and codes for Super Output Areas in the United Kingdom
Information for Administrative areas in the United Kingdom including codes for regions, wards, counties and council areas
Information for Electoral areas in the United Kingdom
Information for Health areas in the United Kingdom
Information for NUTS and LAU areas in the United Kingdom used for Eurostat geography
Information on the Census geographies as at 2001 for England and Wales
Information for the uncategorised geographies in the United Kingdom