ONS Postcode Directory: UK Postcode to Administrative Area Mapping Guide

A February 2020 user guide for the ONS Postcode Directory, detailing its content and methodology. The guide, published by the Government Digital Service, explains data currency, formats, quality, and the process for assigning administrative areas to UK postcodes. It includes annexes and supporting tables, with the guide file itself being 712 KB in size.

Use Cases

• Link postcodes to administrative and statistical geographies based on the described assignment methodology.
• Assess data quality and limitations for UK address-based projects using the guide's detailed information.
• Understand recent changes impacting postcode data for historical analysis or data integration work.

Strengths

• Includes a detailed user guide (712 KB file) explaining methodology, data quality, and limitations.
• Provides information on data currency and recent changes, which aids in understanding temporal relevance.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The guide is from February 2020; the underlying data's freshness should be verified.

Provenance

Source

Government Digital Service

Collection Method

Administrative compilation and assignment methodology as described in the guide.

Time Range

Guide references February 2020 data.

Freshness

Last updated 2025-08-11 07:49:38; freshness should be verified

Geography

United Kingdom (implied by UK postcodes and ONS source).