Bilbao's 2026 population is now estimated at 347,009. In 1950, the population of Bilbao was 227,488. Bilbao has grown by 263 in the last year, which represents a 0.08% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects . These estimates represent the Urban agglomeration of Bilbao, which typically includes Bilbao's population in addition to adjacent suburban areas.