You can get results from the 2001, 2011 and 2021 Censuses by different geographies, for example, Output Areas (OAs).
Most census results for different geographies are based on groups of OAs. Each OA is made up of between 40 and 250 households and a usually resident population of between 100 and 625 persons.
Census results are available for administrative, health and statistical geographies. Administrative and health geographies may change between censuses, but, statistical geographies are only updated following each census.
Census geographies in England and Wales
Get details about the different geographies used in the results from:
Census geographies in Scotland and Northern Ireland
Read about the geographies used in the results for Scotland's 2001 and 2011 Censuses on Scotland's Census website.
You can also read about the geographies used in the results of the 2001, 2011 and 2021 Northern Ireland Censuses on the Northern Ireland Statistics and Research Agency (NISRA) website.