Cagliari's 2021 population is now estimated at 476,485. In 1950, the population of Cagliari was 231,256. Cagliari has grown by 220 since 2015, which represents a 0.05% 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 Cagliari, which typically includes Cagliari's population in addition to adjacent suburban areas.