| City | Population | |
|---|---|---|
| 1 | Seoul | 10349312 |
| 2 | Busan | 3678555 |
| 3 | Incheon | 2954955 |
| 4 | Daegu | 2566540 |
| 5 | Gwangju | 1490092 |
| 6 | Daejeon | 1469543 |
| 7 | Suwon | 1241311 |
| 8 | Goyang-si | 1073069 |
| 9 | Seongnam-si | 1031935 |
| 10 | Changwon | 1025702 |
| 11 | Ulsan | 962865 |
| 12 | Bucheon-si | 850731 |
| 13 | Cheongju-si | 846291 |
| 14 | Ansan-si | 716785 |
| 15 | Cheonan | 666417 |
| 16 | Jeonju | 652392 |
| 17 | Hwaseong-si | 640890 |
| 18 | Anyang-si | 595644 |
| 19 | Kimhae | 550758 |
| 20 | Pohang | 500000 |
| 21 | Jeju City | 486306 |
| 22 | Uijeongbu-si | 479141 |
| 23 | Masan | 434371 |
| 24 | Gumi | 427770 |
| 25 | Pyeongtaek | 364694 |
| 26 | Gwangmyeong | 357545 |
| 27 | Sejong | 351007 |
| 28 | Yangsan | 342371 |
| 29 | Wonju | 332849 |
| 30 | Chinju | 307242 |
| 31 | Iksan | 307000 |