ONS Postcode Directory: UK Postcodes Linked to Administrative and Census Geographies

The ONS Postcode Directory (ONSPD) for August 2023 relates current and terminated UK postcodes to statutory administrative, electoral, and health geographies. It links postcodes to 1991, 2001, and 2021 Census areas for England, Wales, Northern Ireland, and Scotland, supporting the production of area-based statistics. The directory is produced by ONS Geography and issued quarterly.

Use Cases

• Geocode addresses to administrative regions based on postcode linkages.
• Analyze demographic trends by linking postcoded data to 2021 Census Output Areas.
• Map health statistics to pre-2002 health areas using postcode references.
• Study historical population changes by connecting data to 1991 and 2001 Census geographies.

Strengths

• Links postcodes to multiple vintages of census geographies, including 1991, 2001, and 2021 data.
• Includes both current and terminated postcodes, providing historical coverage.
• Covers statutory administrative, electoral, and health area geographies for the entire UK.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale projects.

Provenance

Source

Office for National Statistics (ONS) Geography

Collection Method

Produced by ONS Geography to provide geographic services.

Time Range

Snapshot as of August 2023; includes historical postcodes.

Freshness

Issued quarterly; snapshot is from August 2023.

Geography

United Kingdom