ONS Postcode Directory (August 2025) for the UK (Hosted Table)

<p>This is the ONS Postcode Directory (ONSPD) for the United Kingdom as at August 2025 in Comma Separated Variable (CSV).  This is a new hosted table so can be accessed via API. The ONSPD relates both current and terminated postcodes in the United Kingdom to a range of current statutory administrative, electoral, health and other area geographies. It also links postcodes to 2001 Census Output Areas (OA) and Super Output Areas (SOA) for England and Wales, 2001 Census OAs and SOAs for Norther

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What's in it

Data offered docs-verified: UK postcode to statutory administrative, electoral and health area geographies · postcode to 2001 Census Output Areas and Super Output Areas (England, Wales, Northern Ireland) · postcode to 2001 Census Data Zones (Scotland) · postcode to 2021 Census OAs and SOAs (England, Wales, Northern Ireland) · postcode to 2022 Census Data Zones and Intermediate Zones (Scotland) · current and terminated postcodes
Coverage docs-verified: United Kingdom · as at August 2025
Resolution llm-inferred: Postcode-level lookup table (no coordinates or spatial precision stated in docs)
Update frequency docs-verified: Quarterly
Formats docs-verified: CSV · XLSX · GPKG · GEOJSON · KML · Shapefile (ZIP) · File Geodatabase (ZIP) · SQLite Geodatabase (GDB) · ArcGIS GeoService REST API · hosted table (API access)
Access docs-verified: Free and open; no authentication (ENTRY auth null); licence: Open Government Licence v3.0 except where otherwise stated, and the product contains Royal Mail, Gridlink, LPS (Northern Ireland), Ordnance Survey and ONS Intellectual Property Rights

Useful for

Use cases llm-inferred: Convert client or site postcodes to ward, local authority and electoral areas for planning or consultation mapping · Join postcoded survey or flood-risk records to 2021 Census OAs/SOAs for socio-economic vulnerability screening · Produce area-based statistics from postcoded datasets for community or social impact assessments
Audience llm-inferred: GIS analysts · planners · flood risk consultants · environmental and social impact consultants · data analysts

Limitations

Constraints llm-inferred: Large file (about 2.31 GB CSV) may be heavy to load without a database · Contains third-party IP (Royal Mail, Ordnance Survey, LPS) that may carry attribution or terms beyond OGL · Quarterly release, so postcode changes lag real time · Mixed Census vintages (2001, 2021, 2022) need care when comparing areas · Hosted table API is newly introduced; query limits and stability not stated in docs

Licence: not stated
Authentication: Unknown — review source docs
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 16/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata observed 14/10/2026 · research sweep: sweep-2026-10-16 (data.gov.uk)