Largest cities in Thailand
5 cities with more than 300,000 people, ranked by 2025 population.
- cities of 300k+
- 5
- combined population
- 20 million
- largest
- Bangkok
| # | City | 2025 | 2050 (projected) | Change |
|---|---|---|---|---|
| 1 | Bangkok | 18.2 million | 20.5 million | +12.6% |
| 2 | Chiang Mai | 627,000 | 574,000 | −8.5% |
| 3 | Hat Yai | 407,000 | 379,000 | −6.9% |
| 4 | Phuket | 389,000 | 363,000 | −6.7% |
| 5 | Lop Buri | 378,000 | 469,000 | +24.1% |