National Statistics UPRN Lookup: UK Address to Geography Mapping for May 2026

490 MB of data linking every Unique Property Reference Number (UPRN) in Great Britain to administrative and statistical geographies as of May 2026. The Office for National Statistics (ONS) Geography team produces this lookup every six weeks, using 'best-fit' allocation from 2021 Census output areas. It is designed to complement the Ordnance Survey AddressBase® product, specifically Epoch 126.

Use Cases

• Aggregate public health statistics to local authority areas based on address-level UPRN linkage.
• Assign electoral boundaries for voter registration and analysis using the geography lookup.
• Perform spatial joins for property-level data to census output areas and other statistical geographies.
• Support address validation and geocoding services by linking UPRNs to current administrative units.

Strengths

• File size is 490 MB, indicating a detailed national-scale dataset.
• Updated every six weeks, suggesting relatively high temporal resolution.
• Links addresses to a range of current statutory geographies, providing broad administrative coverage.
• Based on Ordnance Survey AddressBase® Epoch 126, a definitive address source.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to the underlying UK address and census sources.

Provenance

Source

Office for National Statistics (ONS) Geography

Collection Method

Produced via 'best-fit' allocation from 2021 Census output areas to UPRNs from AddressBase®.

Time Range

Snapshot as of May 2026.

Freshness

Last updated 2026-07-02; issued every 6 weeks.

Geography

Great Britain