Cotonou's 2021 population is now estimated at 698,868. In 1950, the population of Cotonou was 20,174. Cotonou has grown by 6,919 since 2015, which represents a 1.00% 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 Cotonou, which typically includes Cotonou's population in addition to adjacent suburban areas.