Cheonan's 2026 population is now estimated at 751,921.In 1980, the population of Cheonan was 231,018.Cheonan has grown by 12,097 in the last year, which represents a 1.64% annual change.These population values and projections come from South Korea city census series 1980-2020 via CityPopulation official attribution and World Population Review Internal Projections.
City | 2026 Pop.↓ | Growth |
|---|---|---|
| Seoul | 9,217,913 | -0.65% |
| Busan | 3,233,150 | -0.59% |
| Incheon | 3,012,841 | 0.38% |
| Daegu | 2,345,915 | -0.45% |
| Daejeon | 1,430,621 | -0.66% |
| Suwon | 1,229,432 | 0.26% |
| Yongin | 1,194,265 | 1.9% |
| Hwaseong | 1,189,035 | 5.13% |
| Goyang | 1,116,116 | 1.1% |
| Ulsan | 1,099,092 | -0.54% |
| Changwon | 994,675 | -0.57% |
| Seongnam | 890,939 | -0.57% |
| Cheongju | 882,558 | 0.52% |
| Bucheon | 820,550 | -0.25% |
| Namyangju | 785,876 | 2.04% |
| Cheonan | 751,921 | 1.64% |
| Siheung | 705,258 | 4.71% |
| Ansan | 683,270 | -0.81% |
| Jeonju | 676,671 | 0.25% |
| Pyeongtaek | 665,004 | 3.45% |