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The Mayor of London The London Assembly

2021 Census

The census has been taken every ten years since 1801 (with the exception of 1941). It forms the most comprehensive dataset on the population and its characteristics and is used to inform policy and spending decisions, identify community needs and shape local priorities.

Census day 2021 was Sunday 21 March. 2021 is a ‘digital-first’ census with most people filling in their questionnaire online using a unique code for their address. A paper questionnaire was also available for anyone who requested it.

Census results

The first results from the census will be population counts by sex and age for local authorities in England and Wales. These will be published in early summer 2022. Detailed results on the characteristics of London’s many communities and localities will follow over the rest of 2022 and into 2023.

Census Information Scheme 2021

The Census Information Scheme for the 2021 Census came into effect on 1 October 2021. The Scheme provides London-specific analysis of census statistics for the 33 London local authorities, the GLA and its Functional Bodies. Our offer includes:

  • Training and advice about the census and related data sources to both census specialist and wider non-specialist audiences
  • Analysis and reporting of census data including commissioning bespoke outputs and analyses
  • Access to current and previous census data including non-public protected datasets and historic census data for London
  • A voice for London in discussions about the future of census-like statistics