Cheonan Population 2020
Cheonan's 2020 population is now estimated at 679,802. In 1950, the population of Cheonan was 21,851. Cheonan has grown by 54,566 since 2015, which represents a 1.69% 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 Cheonan, which typically includes Cheonan's population in addition to adjacent suburban areas.