Jeju's 2025 population is now estimated at 349,801. In 1950, the population of Jeju was 53,289. Jeju has grown by 1,219 in the last year, which represents a 0.35% 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 Jeju, which typically includes Jeju's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Seoul | 10,025,800 | 0.21% |
| Busan | 3,484,430 | 0.2% |
| Incheon | 2,873,700 | 0.42% |
| Daegu | 2,181,080 | 0.05% |
| Daejon | 1,586,180 | 0.28% |
| Gwangju | 1,536,730 | 0.25% |
| Suweon | 1,388,800 | 0.77% |
| Yongin | 1,157,920 | 0.87% |
| Goyang | 1,121,440 | 0.66% |
| Changwon | 1,056,980 | 0.15% |
| Seongnam | 943,458 | 0.14% |
| Ulsan | 916,236 | 0.21% |
| Bucheon | 827,603 | 0.08% |
| Ansan | 771,029 | 0.29% |
| Cheongju | 732,667 | 0.38% |
| Cheonan | 713,308 | 0.66% |
| Jeonju | 667,908 | 0.22% |
| Anyang | 559,645 | -0.02% |
| Siheung | 450,758 | 0.4% |
| Uijeongbu | 425,996 | 0.2% |
| Gumi | 401,111 | 0.54% |
| Pohang | 367,474 | 0.39% |
| Gwangmyeong | 351,246 | 0.31% |
| Jeju | 349,801 | 0.35% |
| Gimhae | 320,026 | 0.33% |