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  • Population estimates for the UK, mid-2019: methods guide

    Released on: 02 July 2020 | Methodology

    Methodology guidance on national and subnational mid-year population estimates for the UK and its constituent countries, which are broken down by administrative area, age, sex and components of population change.

  • Population estimates for the UK, mid-2021: methods guide

    Released on: 21 December 2022 | Methodology

    Methodology guidance on national and subnational mid-year population estimates for the UK and its constituent countries, which are broken down by administrative area, age, sex and components of population change.

  • Population estimates for the UK, mid-2020: methods guide

    Released on: 25 June 2021 | Methodology

    Methodology guidance on national and subnational mid-year population estimates for the UK and its constituent countries, which are broken down by administrative area, age, sex and components of population change.

  • Population estimates by output areas, electoral, health and other geographies QMI

    Released on: 07 November 2025 | Methodology

    Quality and methodology information for national population estimates broken down into small geographical areas (Super Output Areas, health geographies, electoral wards, Parliamentary constituencies and National Parks) in England and Wales. Details the strengths and limitations of the data, methods used, and data uses and users.