UK Westminster Parliamentary Constituencies: Names and Codes as of December 2021

Westminster parliamentary constituencies in the United Kingdom are listed with official names and codes as of 31 December 2021. The Government Digital Service provides this lookup file, which is 29 KB in size and contains three text fields. This dataset serves as a standardized reference for UK electoral geography at a specific point in time.

Use Cases

• Mapping election results based on standardized constituency codes.
• Joining demographic or economic data to constituencies using the PCON21CD identifier.
• Analyzing historical constituency boundaries and names for a specific snapshot date.
• Validating or standardizing constituency names in other datasets.

Strengths

• Provides an official snapshot as of a specific date (31 December 2021).
• File size is explicitly stated as 29 KB, indicating a manageable download.
• Contains standardized codes (PCON21CD) designed for data linkage.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last updated 2025-08-11 08:00:09; freshness should be verified as boundaries may have changed.

Provenance

Source

Government Digital Service

Collection Method

Likely published as part of the Open Geography portal publication process.

Time Range

Snapshot as of 31 December 2021.

Freshness

Snapshot as of 2021 - 12 - 31; metadata updated 2025 - 08 - 11.

Geography

United Kingdom (Westminster parliamentary constituencies).