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Output Area (2021) to County and Unitary Authority (April 2025) Best Fit Lookup in EW

Publisher
Office for National Statistics
Updated
27 January 2026
Topic
Not set
Licence
Not set

Summary

A lookup between 2021 Output Areas (OA) and County and Unitary Authorities (CTYUA) (Counties, Unitary Authorities, Metropolitan Districts and London Boroughs) as at 1st April 2025 in England and Wales. (File Size 6.1 MB).

Field Names – OA21CD, CTYUA25CD, CTYUA25NM, CTYUA25NMW

Field Types – Text, Text, Text, Text

Field Lengths – 9, 9, 35, 24

For more information and an overview of best-fitting follow this link -

https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about

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Data links

Link Format Preview Updated
GeoJSON GEOJSON – 27/1/2026
KML KML – 27/1/2026
Shapefile ZIP – 27/1/2026
ArcGIS GeoService ARCGIS GEOSERVICES REST API – 27/1/2026
CSV CSV Preview 27/1/2026
ArcGIS Hub Dataset HTML – 27/1/2026

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Additional information

Source Metadata
XML, HTML
Harvest GUID
https://www.arcgis.com/home/item.html?id=953ccc7bef3947738164052b82d56eb2&sublayer=0

Contact

Enquiries

ons.geography@ons.gov.uk

Freedom of information (FOI) requests

FOI.Team@ons.gov.uk

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Support links

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All content is available under the Open Government Licence v3.0, except where otherwise stated.