# Population in Belfast

Population in Belfast was 351,927 in 2025. Source: Office for National Statistics (United Kingdom).

- Indicator id: `population`
- Place id: `gb-la-n09000003`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). Norway: Statistics Norway, 1 January. Iceland and its municipalities: Statistics Iceland, 1 January. United States: Census Bureau population estimates for 1 July. United Kingdom regions and local authorities: Office for National Statistics estimates for 30 June. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship. UN World Population Prospects estimates for 1 July cover the years before 1960 and the areas the World Bank does not publish, such as Taiwan.
- Note: The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.
- Source: Office for National Statistics (United Kingdom), Population estimates, local authority based by single year of age: all ages, both sexes, mid-year (ONS, Nomis NM_2002_1) (https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=200&measures=20100&time=2011,latest)
- Publisher page: https://invokely.ai/en/publishers/ons-uk
- Retrieved: 2026-10-11
- License: Open Government Licence v3.0 (commercial reuse, attribution required)
- Citation: Office for National Statistics. Population estimates, local authority based by single year of age: all ages, both sexes, mid-year (ONS, Nomis NM_2002_1). Contains public sector information licensed under the Open Government Licence v3.0. https://www.nomisweb.co.uk/api/v01/dataset/NM_2002_1.data.json?geography=TYPE480,TYPE424&gender=0&c_age=200&measures=20100&time=2011,latest. Retrieved 2026-10-11.
- Web page: https://invokely.ai/en/population/belfast-uk
- API: https://invokely.ai/api/v1/series?indicator=population&place=gb-la-n09000003

| Period | persons |
|---|---:|
| 2025 | 351,927 |
| 2024 | 352,390 |
| 2023 | 350,533 |
| 2022 | 348,005 |
| 2021 | 344,992 |
| 2020 | 344,994 |
| 2019 | 345,391 |
| 2018 | 343,690 |
| 2017 | 341,915 |
| 2016 | 341,111 |
| 2015 | 340,194 |
| 2014 | 337,872 |
| 2013 | 335,881 |
| 2012 | 334,322 |
| 2011 | 333,895 |