Pathum Thani's 2026 population is now estimated at 986,213. In 1950, the population of Pathum Thani was 954. Pathum Thani has grown by 12,018 in the last year, which represents a 1.23% 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 Pathum Thani, which typically includes Pathum Thani's population in addition to adjacent suburban areas.
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Bangkok | 11,543,900 | 1.34% |
| Chon Buri | 1,509,580 | 1.23% |
| Samut Prakan | 1,410,600 | 1.23% |
| Chiang Mai | 1,259,540 | 1.23% |
| Songkhla | 1,043,260 | 1.23% |
| Nakhon Ratchasima | 831,016 | 1.2% |
| Samut Sakhon | 624,139 | 1.23% |
| Udon Thani | 611,342 | 1.19% |
| Chiang Rai | 593,585 | 1.23% |
| Rayong | 580,833 | 1.23% |
| Nakhon Pathom | 576,756 | 1.65% |
| Kalasin | 558,690 | 1.23% |
| Surat Thani | 535,306 | 1.23% |
| Lop Buri | 535,183 | 2.11% |
| Ubon Ratchathani | 534,017 | 1.23% |
| Buri Ram | 489,735 | 1.23% |
| Lampang | 485,131 | 1.23% |
| Phra Nakhon Si Ayutthaya | 476,244 | 1.23% |
| Roi Et | 475,554 | 1.23% |
| Phuket | 466,495 | 1.23% |
| Ratchaburi | 444,864 | 1.35% |
| Chanthaburi | 412,898 | 1.65% |
| Sakon Nakhon | 411,309 | 1.23% |
| Suphan Buri | 386,646 | 1.65% |
| Lamphun | 342,337 | 1.23% |
