UK Counties and Unitary Authorities Boundaries for December 2025

Digital vector boundaries for Counties and Unitary Authorities in the United Kingdom, as of December 2025. The boundaries are provided in a Super Generalised (200m) format, clipped to the coastline. The dataset contains intellectual property from both Ordnance Survey and the UK Office for National Statistics.

Use Cases

• Create thematic maps of UK administrative regions based on the provided vector boundaries.
• Perform spatial joins to aggregate other UK data to the county/unitary authority level based on the described boundaries.
• Analyze changes in UK administrative geography over time by comparing these 2025 boundaries with other vintages.

Strengths

• Boundaries are specified as being current for a specific date (December 2025).
• Data is provided in a generalized (200m) format, which is likely optimized for small-scale mapping and analysis.
• Contains intellectual property from authoritative UK sources: Ordnance Survey and the Office for National Statistics.

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 statistical modeling.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Office for National Statistics

Time Range

December 2025

Freshness

Last updated 2026-05-13 18:04:04.878419; freshness should be verified.

Geography

United Kingdom