Samut Sakhon's 2026 population is now estimated at 624,139. In 1950, the population of Samut Sakhon was 23,051. Samut Sakhon has grown by 7,606 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 Samut Sakhon, which typically includes Samut Sakhon'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% |
| Pathum Thani | 986,213 | 1.23% |
| Nakhon Ratchasima | 831,016 | 1.2% |
| 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% |
