Register of Geographic Codes (June 2025) for the UK

The Register of Geographic Codes (RGC) is a key product that contains the definitive list of UK statistical geographies. ONS maintains the definitive set of statistical geographies, coordinates the issue of new codes, and maintains the relationship between active and archived code rangeson behalf of the Government Statistical Service.The RGC should be used in conjunction with the Code History Database, available to download separately.