Bilbao had the highest population of 113 municipalities in 2024, at 348,089. Arakaldo had the lowest, at 160. The median was 1,656 and the figure for Biscay province was 1.16 million. Source: the Instituto Nacional de Estadística.
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 municipalities are compared on one definition. Equal values share a rank.
How to cite
Instituto Nacional de Estadística (INE). Cifras oficiales de población de los municipios españoles: Revisión del Padrón municipal (tabla 29005). https://www.ine.es/jaxiT3/Tabla.htm?t=29005. Retrieved 2026-10-07.
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 Municipalities in Biscay province by population using official data, and cite the source.
rank_places {"indicator":"population","level":"municipality","within":"Biscay","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population&level=municipality&within=Biscay&limit=10
Bilbao, with 348,089 in 2024, according to the Instituto Nacional de Estadística.
Which municipality has the lowest population?
Arakaldo, with 160 in 2024.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: Instituto Nacional de Estadística, Cifras oficiales de población de los municipios españoles: Revisión del Padrón municipal (tabla 29005). Retrieved 2026-10-07.
