Khon-Kaen's 2025 population is now estimated at 535,847. In 1950, the population of Khon-Kaen was 13,128. Khon-Kaen has grown by 6,639 in the last year, which represents a 1.25% 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 Khon-Kaen, which typically includes Khon-Kaen's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Bangkok | 11,391,700 | 1.41% |
| Chon Buri | 1,491,180 | 1.25% |
| Samut Prakan | 1,393,410 | 1.25% |
| Chiang Mai | 1,244,190 | 1.26% |
| Songkhla | 1,030,550 | 1.26% |
| Nonthaburi | 1,026,390 | 1.26% |
| Pathum Thani | 974,195 | 1.25% |
| Nakhon Ratchasima | 821,187 | 1.2% |
| Samut Sakhon | 616,533 | 1.25% |
| Udon Thani | 604,163 | 1.19% |
| Chiang Rai | 586,352 | 1.25% |
| Rayong | 573,756 | 1.26% |
| Nakhon Pathom | 567,386 | 1.87% |
| Kalasin | 551,882 | 1.25% |
| Khon-Kaen | 535,847 | 1.26% |
| Surat Thani | 528,783 | 1.26% |
| Ubon Ratchathani | 527,549 | 1.24% |
| Lop Buri | 524,118 | 2.55% |
| Buri Ram | 483,767 | 1.25% |
| Lampang | 479,219 | 1.25% |
| Phra Nakhon Si Ayutthaya | 470,442 | 1.25% |
| Roi Et | 469,760 | 1.25% |
| Phuket | 460,810 | 1.25% |
| Ratchaburi | 438,953 | 1.42% |
| Sakon Nakhon | 406,297 | 1.26% |
| Chanthaburi | 406,188 | 1.87% |
| Suphan Buri | 380,383 | 1.86% |
| Lamphun | 338,166 | 1.26% |
