ONS Postcode Directory: UK Postcode to Geographic Area Linkages (August 2019)

ONS Postcode Directory (ONSPD) User Guide from August 2019, published by the Government Digital Service. The guide details the directory's content, data currency, methodology for assigning geographic areas to postcodes, data formats, quality, limitations, and recent changes. The supporting HTML file is 456 KB in size.

Use Cases

• Link postcodes to administrative boundaries for demographic analysis based on the area assignment methodology.
• Assess data quality for location-based applications based on the described data quality and limitations.
• Understand the temporal coverage and changes in postcode geography based on the data currency and recent changes information.

Strengths

• Includes a documented methodology for assigning geographic areas to postcodes.
• Provides explicit information on data quality and limitations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The data snapshot is from August 2019; freshness should be verified for current applications.

Provenance

Source

Government Digital Service

Collection Method

Likely compiled from official UK geographic and postal sources.

Time Range

Snapshot from August 2019.

Freshness

Last updated 2025-08-11 07:49:31; freshness should be verified

Geography

United Kingdom