26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kingsbury town | 1 | 12,780 | 12,938 | -0.36% | 322 | 39.67 | Town |
| Hudson Falls | 2 | 7,350 | 7,414 | -0.18% | 3,949 | 1.86 | Village |
| Granville town | 3 | 6,135 | 6,203 | -0.32% | 110 | 55.62 | Town |
| Fort Edward town | 4 | 5,838 | 5,962 | -0.76% | 219 | 26.62 | Town |
| Greenwich town | 5 | 4,802 | 4,859 | -0.35% | 110 | 43.66 | Town |
| Whitehall town | 6 | 3,967 | 4,012 | -0.33% | 69 | 57.16 | Town |
| Fort Ann town | 7 | 3,897 | 5,733 | -12.27% | 36 | 109.12 | Town |
| Argyle town | 8 | 3,608 | 3,641 | -0.25% | 64 | 56.54 | Town |
| White Creek town | 9 | 3,229 | 3,271 | -0.37% | 67 | 47.92 | Town |
| Fort Edward | 10 | 3,133 | 3,162 | -0.19% | 1,778 | 1.76 | Village |
| Salem town | 11 | 2,574 | 2,605 | -0.35% | 49 | 52.36 | Town |
| Whitehall | 12 | 2,470 | 2,490 | -0.16% | 438 | 5.64 | Village |
| Granville | 13 | 2,408 | 2,427 | -0.17% | 1,555 | 1.55 | Village |
| Easton town | 14 | 2,244 | 2,274 | -0.31% | 36 | 62.28 | Town |
| Hartford town | 15 | 2,151 | 2,185 | -0.42% | 50 | 43.37 | Town |
| Cambridge town | 16 | 1,900 | 1,948 | -0.63% | 52 | 36.40 | Town |
| Cambridge | 17 | 1,790 | 1,805 | -0.17% | 1,037 | 1.73 | Village |
| Hebron town | 18 | 1,762 | 1,784 | -0.34% | 31 | 56.11 | Town |
| Jackson town | 19 | 1,693 | 1,713 | -0.35% | 46 | 37.15 | Town |
| Greenwich | 20 | 1,661 | 1,675 | -0.18% | 1,130 | 1.47 | Village |
| Salem | 21 | 1,068 | 933 | 7.23% | 364 | 2.93 | CDP |
| Hampton town | 22 | 849 | 857 | -0.35% | 38 | 22.24 | Town |
| North Granville | 23 | 756 | 516 | 7.08% | 726 | 1.04 | CDP |
| Putnam town | 24 | 556 | 565 | -0.54% | 17 | 32.79 | Town |
| Fort Ann | 25 | 471 | 475 | -0.21% | 1,647 | 0.29 | Village |
| Argyle | 26 | 293 | 293 | 0% | 924 | 0.32 | Village |
Kingsbury town is the largest city in Washington County, with a population of 12,780.
Argyle is the smallest city in Washington County.
There are 26 cities in Washington County, New York.