Gampaha's 2026 population is now estimated at 69,141.In 2025, the population of Gampaha was 68,631.Gampaha has grown by 510 in the last year, which represents a 0.74% annual change.These population values and projections come from World Population Review Internal Projections.
City | 2026 Pop.↓ | Growth |
|---|---|---|
| Colombo | 468,377 | -1.28% |
| Kaduwela (Battaramulla) | 319,383 | 1.71% |
| Maharagama | 211,706 | 0.54% |
| Negombo | 174,048 | 1.44% |
| Moratuwa | 157,164 | -0.49% |
| Dehiwala-Mount Lavinia | 155,896 | -1.19% |
| Kalmunai (incl. Sainthamarathu) | 107,090 | 0.5% |
| Sri Jayawardenepura | 98,062 | -0.68% |
| Batticaloa | 94,388 | 0.65% |
| Kandy | 86,895 | -0.91% |
| Galle | 81,570 | -0.4% |
| Matara | 71,650 | -0.25% |
| Gampaha | 69,141 | 0.74% |
| Jaffna | 68,075 | -1.22% |
| Gampola | 66,672 | 4.12% |
| Kolonnawa | 66,612 | 0.74% |
| Puttalam | 50,775 | 0.79% |
| Trincomalee | 50,293 | 0.28% |
| Kattankudy (Kathankudi) | 48,819 | 1.37% |
| Ratnapura | 48,305 | 0.18% |
