Middle Layer Super Output Areas: 2001 Census Geography for England and Wales

England and Wales geographic boundaries from the 2001 census, created by the Office for National Statistics. The dataset contains names and codes for Middle Layer Super Output Areas (MSOAs), which are statistical geographies used for census and survey data dissemination. The file is available in HTML format and was last updated on 2026-07-08.

Use Cases

• Aggregating socio-economic indicators based on MSOA boundaries mentioned in the description
• Mapping census data for England and Wales based on the 2001 geographic framework
• Joining statistical data using the MSOA names and codes referenced in the title
• Analyzing demographic trends within consistent 2001-era administrative units

Strengths

• Produced by the authoritative Office for National Statistics.
• Covers the complete geographic scope of England and Wales.
• File size is explicitly stated as 193 KB.

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 temporal bias inherent to the 2001 census geography.

Provenance

Source

Office for National Statistics

Time Range

December 2001

Freshness

Last updated 2026-07-08 13:31:18.460175; freshness should be verified.

Geography

England and Wales