26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kingsbury | 1 | 12,842 | 12,943 | -0.12% | 324 | 40 | Town |
| Hudson Falls | 2 | 7,344 | 7,416 | -0.2% | 3,946 | 2 | Village |
| Granville | 3 | 6,177 | 6,201 | 0.05% | 111 | 56 | Town |
| Fort Edward | 4 | 5,966 | 5,960 | 0.34% | 224 | 27 | Town |
| Greenwich | 5 | 4,845 | 4,858 | 0.1% | 111 | 44 | Town |
| Fort Ann | 6 | 4,511 | 5,739 | -4.91% | 41 | 109 | Town |
| Whitehall | 7 | 4,009 | 4,014 | 0.2% | 70 | 57 | Town |
| Argyle | 8 | 3,632 | 3,645 | 0.03% | 64 | 57 | Town |
| White Creek | 9 | 3,266 | 3,272 | 0.15% | 68 | 48 | Town |
| Fort Edward | 10 | 3,131 | 3,163 | -0.22% | 1,777 | 2 | Village |
| Salem | 11 | 2,603 | 2,609 | 0.12% | 50 | 52 | Town |
| Whitehall | 12 | 2,479 | 2,492 | -0.12% | 440 | 6 | Village |
| Granville | 13 | 2,418 | 2,428 | -0.08% | 1,561 | 2 | Village |
| Easton | 14 | 2,257 | 2,274 | 0.04% | 36 | 62 | Town |
| Hartford | 15 | 2,176 | 2,185 | 0.18% | 50 | 43 | Town |
| Cambridge | 16 | 1,917 | 1,946 | -0.1% | 53 | 36 | Town |
| Cambridge | 17 | 1,799 | 1,806 | -0.11% | 1,042 | 2 | Village |
| Hebron | 18 | 1,778 | 1,784 | 0.17% | 32 | 56 | Town |
| Jackson | 19 | 1,709 | 1,714 | 0.12% | 46 | 37 | Town |
| Greenwich | 20 | 1,667 | 1,676 | -0.12% | 1,134 | 1 | Village |
| Salem | 21 | 1,068 | 933 | 7.23% | 364 | 3 | CDP |
| Hampton | 22 | 858 | 858 | 0.12% | 39 | 22 | Town |
| North Granville | 23 | 756 | 516 | 7.08% | 726 | 1 | CDP |
| Putnam | 24 | 562 | 564 | 0% | 17 | 33 | Town |
| Fort Ann | 25 | 471 | 473 | -0.21% | 1,647 | 0 | Village |
| Argyle | 26 | 291 | 293 | -0.34% | 918 | 0 | Village |
Kingsbury is the largest city in Washington County, with a population of 12,842.
Argyle is the smallest city in Washington County, with a population of 291.
There are 26 cities in Washington County, New York.