Register of Geographic Codes: Definitive UK Statistical Geographies for April 2021

ONS maintains the definitive list of UK statistical geographies, coordinating new codes and maintaining relationships between active and archived code ranges. This April 2021 snapshot from the Government Statistical Service provides a key reference for linking data to official geographic units. The register should be used in conjunction with the separately available Code History Database.

Use Cases

• Standardizing data aggregation based on the definitive list of UK statistical geographies.
• Linking historical and current data records using the maintained relationship between active and archived code ranges.
• Ensuring geographic consistency in official reports by using ONS-coordinated codes.

Strengths

• Provides the definitive list of UK statistical geographies maintained by the Office for National Statistics.
• Includes relationships between active and archived code ranges, supporting temporal analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2025-08-11 07:50:46; freshness should be verified for the April 2021 data.

Provenance

Source

Government Digital Service, on behalf of the Government Statistical Service.

Collection Method

Maintained and coordinated by the Office for National Statistics (ONS).

Time Range

April 2021 snapshot.

Freshness

Snapshot from April 2021; metadata last updated on 2025-08-11.

Geography

United Kingdom.