Charleroi's 2025 population is now estimated at 419,244. In 1950, the population of Charleroi was 412,900. Charleroi has grown by 1,157 in the last year, which represents a 0.28% 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 Charleroi, which typically includes Charleroi's population in addition to adjacent suburban areas.