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The Mayor of London The London Assembly

2021 Census

The 2021 Census is here

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

This is a ‘digital-first’ Census with the ONS wanting as many people as possible to fill in their questionnaire online in 2021.

Completing the Census

Every household should complete the census on Sunday 21 March 2021 or as soon as possible after

Most people will get a letter through the post with a unique access code on it. All you need to do is enter the code into the Census 2021 website and fill in the questionnaire.

For guidance on how to complete your Census form, or to request a paper questionnaire, please visit the Census website or ring the Census helpline on 0800 141 2021

Translation support is also available on the website, or to speak to someone in another language you can ring the languages helpline on 0800 587 2021

Census Information Scheme 2021

The Census Information Scheme had been confirmed for the 2021 Census. 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