Census definitions
The following documents contain the definitions, available as PDFs, and concepts that were used for each census.
England and Wales
- 2011 variables and classifications
- 2011-2001 Census in England and Wales questionnaire comparability.
Northern Ireland
Scotland
UK Comparability
- 2001 definitions: glossary of terms
- 2001 definitions: introduction, methodology, comparability with 1991 Census
- 2001 definitions: output classifications – part 1
- 2001 definitions: output classifications – part 2
- 2001 definitions: filters and output tables
- 2001 definitions: reference maps
- 2011-2001 Census in England and Wales questionnaire comparability.