Posadas's 2021 population is now estimated at 395,909. In 1950, the population of Posadas was 45,612. Posadas has grown by 7,127 since 2015, which represents a 1.83% 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 Posadas, which typically includes Posadas's population in addition to adjacent suburban areas.