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Office for National Statistics
Dataset Description
This file is a best fit lookup between 2021 middle layer super output areas and counties and unitary authorities in England and Wales as at 1st April 2025. (File size - 1.2 MB)
Field Names - MSOA21CD, MSOA21NM, MSOA21NMW, CTYUA25CD, CTYUA25NM, CTYUA25NMW
Field Types - Text, Text, Text, Text, Text, Text
Field Lengths - 9, 39, 28, 9, 35, 24
For more information and an overview of best-fitting follow this link -
https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about
Publisher name: Office for National Statistics
Last updated: 2026-05-07T04:00:05Z