Haikou's 2021 population is now estimated at 1,931,705. In 1950, the population of Haikou was 106,982. Haikou has grown by 42,634 since 2015, which represents a 2.26% 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 Haikou, which typically includes Haikou's population in addition to adjacent suburban areas.