Cheongju's 2026 population is now estimated at 735,282. In 1950, the population of Cheongju was 71,689. Cheongju has grown by 2,615 in the last year, which represents a 0.36% 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 Cheongju, which typically includes Cheongju's population in addition to adjacent suburban areas.
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Seoul | 10,050,200 | 0.24% |
| Busan | 3,492,730 | 0.24% |
| Incheon | 2,884,820 | 0.39% |
| Daegu | 2,184,070 | 0.14% |
| Gwangju | 1,540,890 | 0.27% |
| Gwangju | 1,540,890 | 0.27% |
| Daejeon | 1,538,394 | 1.01% |
| Suwon | 1,194,313 | 1.03% |
| Changwon | 1,059,130 | 0.2% |
| Ulsan | 918,482 | 0.24% |
| Cheonan | 717,256 | 0.55% |
| Jeonju | 669,579 | 0.25% |
| Namyangju | 629,061 | 1.04% |
| Gumi | 402,995 | 0.47% |
| Pohang | 368,816 | 0.36% |
| Wonju | 330,854 | 1.01% |
| Asan | 319,929 | 1.03% |
| Iksan | 301,723 | 1% |
| Yangsan | 297,532 | 1.04% |
| Chuncheon | 281,596 | 1.01% |
| Gunsan | 275,155 | 1.01% |
| Yeosu | 273,761 | 1% |
| Suncheon | 265,390 | 1.01% |
| Gyeongju | 262,310 | 1.01% |
| Mokpo | 239,524 | 0.99% |
| Gangneung | 215,677 | 1% |
| Osan | 213,840 | 1.03% |
| Yangju | 205,988 | 1.02% |
| Sejong | 204,088 | 1.2% |
| Anseong | 194,765 | 1.02% |
| Seosan | 169,221 | 1.02% |
| Andong | 168,581 | 1% |
| Hanam | 154,838 | 1.02% |
| Seogwipo | 153,861 | 1.03% |
| Gimcheon | 137,540 | 1.02% |
| Nonsan | 124,246 | 1.01% |
| Gongju | 113,542 | 0.99% |
| Jeongeup | 110,627 | 1% |
| Yeoju | 109,937 | 1.02% |
| Miryang | 103,069 | 1.01% |
| Sangju | 98,760 | 1% |
| Naju | 92,582 | 1.04% |
| Sokcho | 79,846 | 1% |
| Mungyeong | 71,863 | 1.01% |