Chittagong's 2021 population is now estimated at 5,132,751. In 1950, the population of Chittagong was 288,853. Chittagong has grown by 112,927 since 2015, which represents a 2.25% 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 Chittagong, which typically includes Chittagong's population in addition to adjacent suburban areas.