Owerri's 2021 population is now estimated at 908,109. In 1950, the population of Owerri was 11,518. Owerri has grown by 35,505 since 2015, which represents a 4.07% 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 Owerri, which typically includes Owerri's population in addition to adjacent suburban areas.