UUNITED KINGDOM
FACTBOOK
United Kingdom FactbookDraft

November 2026 Edition

← Regions

United Kingdom / constituent country

Northern Ireland · People and Society

constituent country. Regional chapter contents and subject sections follow below.

Geography reference: Effective date not supplied. System: administrative. [1]

Relationship recorded by the source: administrative subdivision with United Kingdom. Effective from: Not supplied; effective to: Not supplied. Source accessed: 2026-11-05; the relationship is recorded as observed in that source, and its historical effective date is not established.

People and Society

Sections in this chapter (5)
  1. Reference text
  2. Median age of the usual resident population
  3. Estimated female usual resident population, all ages
  4. Estimated male usual resident population, all ages
  5. Estimated usual resident population, all ages

Reference text

These estimates describe usual residents at 30 June 2025, including students at their term-time address and long-term migrants under the source definition. Sex-specific all-ages estimates and median age appear as separate observations. The underlying constituent-country release was published on 2026-09-24, and the combined UK workbook was published on 1 October 2026. Accuracy of estimates and rounding: estimates for England, Wales and Northern Ireland are provided unrounded. Estimates for Scotland involve some rounding to the nearest 10. Unrounded estimates are published to enable and encourage further calculations and analysis. However, the estimates should not be taken to be accurate to the level of detail provided. Confidence Intervals for population estimates at the local authority level for England and Wales are provided in table MYE0 in this workbook. Statistical uncertainty is lowest immediately following a census, and greatest immediately before the next census. This is because errors accumulate over time as estimates are rolled forward onto the following year. In general, the degree of uncertainty is higher for smaller geographies. (2025-06-30; source publication 2026-10-01) [2]
Source context

Reference period: 2025-06-30; source publication 2026-10-01.

ONS workbook, Cover sheet A10. The datasets are broadly comparable. The estimates for England and Wales, Scotland, and Northern Ireland use different data sources and methods. These can also differ across years.

Source [2]

Median age of the usual resident population

Median age of the usual resident population: 40.6 years (2025-06-30) [2]
Source context

Reference period: As stated in each note.

Source metadata not supplied.

Estimated female usual resident population, all ages

Estimated female usual resident population, all ages: 977,603 persons (2025-06-30) [2]
Source context

Reference period: As stated in each note.

Source metadata not supplied.

Estimated male usual resident population, all ages

Estimated male usual resident population, all ages: 950,843 persons (2025-06-30) [2]
Source context

Reference period: As stated in each note.

Source metadata not supplied.

Estimated usual resident population, all ages

Estimated usual resident population, all ages: 1,928,446 persons (2025-06-30) [2]
Source context

Reference period: As stated in each note.

Source metadata not supplied.

Notes & sources

  1. Countries and regions

    Publisher: Office for National Statistics

    Reference period: As stated with each observation.

    Source release: Not supplied. Accessed: 2026-11-05.

    Lists England, Northern Ireland, Scotland and Wales as the parts of the United Kingdom.

    Open original source ↗

  2. Population estimates: Summary for United Kingdom, mid-2025

    Publisher: Office for National Statistics, with National Records of Scotland and Northern Ireland Statistics and Research Agency

    Reference period: As stated with each observation.

    Source release: 2026-10-01. Accessed: 2026-11-05.

    Direct country aggregate cells in the retained ONS workbook. ONS workbook, Cover sheet A10. The datasets are broadly comparable. The estimates for England and Wales, Scotland, and Northern Ireland use different data sources and methods. These can also differ across years.

    Open original source ↗

Countries & territories

Same-year values. Equal values share a rank.

Sources & method

Ranks cover available countries and territories, using the same indicator, source unit and reference year. Unrounded source values determine ties. Coverage is not a sovereign-country or complete global ranking; national definitions may differ. Missing values and other years are excluded. The information icon preserves the original number, unit and evidence.

RankCountry or territoryValue
Source information
International organization

Source observations