Umuahia's 2021 population is now estimated at 816,983. In 1950, the population of Umuahia was 13,255. Umuahia has grown by 43,161 since 2015, which represents a 5.58% 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 Umuahia, which typically includes Umuahia's population in addition to adjacent suburban areas.