UK census data
Censuses took place in England and Wales, and Northern Ireland in March 2021. Scotland's census took place in March 2022. The Office for National Statistics (ONS) are working closely with UK census offices to publish comparable data from across the UK.
Get information about how ONS are working with the other UK census offices and their plans for UK census outputs.
Alternative population bases
Alternative population bases are the different geographical locations where individuals could have been counted for Census 2021. Examples include workplace, workday and out-of-term populations.
Small populations
Small populations are groups that are defined by their cultural background, including characteristics such as ethnic group, country of birth, religion and national identity. Examples of small populations that we are committed to producing datasets about include Cornish, Kashmiri, Nepali, Sikh, Ravidassia and Jain.
Get more information about datasets we will produce and those we are considering to produce on alternative and small populations.
Detailed migration data
Detailed migration statistics provide the characteristics of people or households who have moved within the UK or from another country into the UK during the year before the census.
Get more information about the datasets the Office for National Statistics (ONS) will produce on detailed migration.
Origin-destination data or 'flow' data
Origin-destination data describes the movement of people from one location to another. Planned types of origin-destination data from Census 2021 include:
- migration flow data
- workplace flow data
- second address flow data
- student flow data
These datasets will be classified as either public, safeguard or secure. Get more details about ONS's plans, including how you can access origin-destination data.
Microdata samples
Microdata are samples of anonymised records for individuals and households, which include a selection of associated census characteristics. Microdata samples will be classified in three ways: public, safeguarded or secure.
Read more details about ONS's plans including how you can access microdata samples.
