UK Postcode to Parliamentary Constituency Lookup for 2024

Postcode (February 2024) to Westminster Parliamentary Constituencies (July 2024) Lookup in the UK (V2) is a CSV file mapping UK postcodes to new parliamentary constituencies effective from July 2024. The file size is 20MB and the dataset includes updated codes for five Scottish constituencies. The data was last updated on the platform on August 13, 2025.

Use Cases

• Map voter addresses to new electoral constituencies based on the postcode-to-constituency lookup.
• Analyze demographic or political data at the constituency level using postcode as a join key.
• Update civic or electoral systems to reflect the July 2024 boundary changes.
• Validate or correct constituency assignments for datasets containing UK postcodes.

Strengths

• File size of 20MB suggests a detailed, nationwide postcode listing.
• Specifically maps postcodes from February 2024 to constituencies that became operable on July 4, 2024, providing temporal alignment.
• Version 2 includes corrected codes for five named Scottish constituencies (e.g., Ayr, Carrick and Cumnock).

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 processing.
• Freshness should be verified as the underlying postcode data is from February 2024.

Provenance

Source

Government Digital Service

Collection Method

Likely an official administrative compilation for electoral purposes.

Time Range

Postcodes as of February 2024, mapped to constituencies effective July 2024.

Freshness

Last updated 2025-08-13 13:16:23; underlying postcode data is from February 2024.

Geography

United Kingdom, with specific mention of Scottish constituencies.