Methodology related to population estimates

  • Administrative data used in Census 2021, England and Wales

    Methodology | Released on 15 September 2022

    The administrative data sources that were used in the statistical design for Census 2021, with information on their coverage, accuracy, and timeliness.

    Keywords: Statistical design, census, source, info

  • Methods for producing mid-2021 population estimates rolled forward from Census 2021

    Methodology | Released on 5 September 2022

    Developments in producing mid-2021 population estimates rolled forward from Census 2021, by local authority district, age, and sex. Includes method changes needed to roll forward the three months from Census Day to mid-year and discusses our ongoing challenges.

    Keywords: international migration, internal migration, local authority

  • Population statistics and sources guide

    Methodology | Released on 5 September 2022

    A comparison of the different types of population estimate that are planned for or are published in 2022 and early 2023. Includes information about whether these are official estimates of the population or used only for wider research, as well as the sources, coverage and main uses and comparability issues for the estimate.

    Keywords: census 2021, population statistics transformation

  • Quality and methodology information (QMI) for Census 2021

    Methodology | Released on 28 June 2022

    Details the strengths, limitations, uses, users and methods used for Census 2021, England and Wales.

    Keywords: population, data collection, , data collection, response rate, quality assurance, accuracy

  • Maximising the quality of Census 2021 population estimates

    Methodology | Released on 28 June 2022

    How we maximised the quality of Census 2021 population estimates during the processing and quality assurance of the final statistics.

    Keywords: estimation, adjustment, qa, response rate, coverage

  • Compare age-sex estimates from Census 2021 to areas within England and Wales

    Methodology | Released on 28 June 2022

    Interactive tool to help local authorities compare age-sex estimates and comparator data from Census 2021 to other areas within England and Wales.

    Keywords: census, tool, local authorities, comparison, quality

  • Population estimates by marital status and living arrangements QMI

    Methodology | Released on 16 December 2021

    Quality and methodology information for Population estimates by marital status and living arrangements, detailing the strengths and limitations of the data, methods used, and data uses and users.

    Keywords: marital status, living arrangements, population estimates

  • Calculating population estimates of the very old

    Methodology | Released on 17 September 2021

    Methods used to produce the population estimates of the very old (aged 90 years and over) by single year of age and sex, UK, England, and Wales.

    Keywords: ageing, centenarians, older people, population

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

    Methodology | Released on 16 September 2021

    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.

    Keywords: SAPE, LSOA, MSOA, OA, CCG

  • Methodology note on production of population estimates by output areas, electoral, health and other geographies, England and Wales

    Methodology | Released on 16 September 2021

    Methodology for national population estimates broken down into small geographical areas – Super Output Areas, health geographies, electoral wards, Parliamentary constituencies and National Parks.

    Keywords: SAPE, small area, 2011 cencus