Hamadan's 2021 population is now estimated at 584,645. In 1950, the population of Hamadan was 87,022. Hamadan has grown by 6,837 since 2015, which represents a 1.18% 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 Hamadan, which typically includes Hamadan's population in addition to adjacent suburban areas.