Largest cities in South Korea
11 cities with more than 300,000 people, ranked by 2025 population.
- cities of 300k+
- 11
- combined population
- 34.7 million
- largest
- Seoul
| # | City | 2025 | 2050 (projected) | Change |
|---|---|---|---|---|
| 1 | Seoul | 22.5 million | 21.2 million | −5.6% |
| 2 | Busan | 3.3 million | 2.7 million | −15.9% |
| 3 | Daegu | 2.3 million | 2 million | −15.6% |
| 4 | Daejeon | 1.5 million | 1.4 million | −10.7% |
| 5 | Gwangju | 1.4 million | 1.3 million | −9.9% |
| 6 | Ulsan | 882,000 | 724,000 | −17.9% |
| 7 | Cheongju-si | 690,000 | 612,000 | −11.3% |
| 8 | Changwon | 666,000 | 547,000 | −17.9% |
| 9 | Jeonju | 637,000 | 571,000 | −10.4% |
| 10 | Cheonan-si | 428,000 | 383,000 | −10.5% |
| 11 | Pohang-si | 382,000 | 315,000 | −17.5% |