Tainan's 2021 population is now estimated at 856,736. In 1950, the population of Tainan was 40,000. Tainan has grown by 6,740 since 2015, which represents a 0.79% 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 Tainan, which typically includes Tainan's population in addition to adjacent suburban areas.