Arr. de Bruxelles-Capitale/Arr. Brussel-Hoofdstad had the highest population of 44 areas in 2021, at 1.23 million. Arr. Bastogne had the lowest, at 50,438. The median was 180,715 and the figure for Belgium was 11.55 million. Source: Eurostat, European Commission.
Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.
Every value in the ranking comes from the same publisher and the same period, so the areas are compared on one definition. Equal values share a rank.
How to cite
Eurostat. Population on 1 January by NUTS 3 region (demo_r_pjanaggr3). https://ec.europa.eu/eurostat/databrowser/view/demo_r_pjanaggr3/default/table. Retrieved 2026-10-08.
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank NUTS 3 areas of Belgium by population using official data, and cite the source.
rank_places {"indicator":"population","level":"province","within":"Belgium","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population&level=province&within=Belgium&limit=10
Arr. de Bruxelles-Capitale/Arr. Brussel-Hoofdstad, with 1.23 million in 2021, according to Eurostat, European Commission.
Which area has the lowest population?
Arr. Bastogne, with 50,438 in 2021.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: Eurostat, European Commission, Population on 1 January by NUTS 3 region (demo_r_pjanaggr3). Retrieved 2026-10-08.
