19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Malone | 1 | 11,882 | 12,126 | 2.18% | 117 | 101.52 | Town |
| Malone | 2 | 5,339 | 5,491 | -0.56% | 1,712 | 3.12 | Village |
| Harrietstown | 3 | 5,193 | 5,262 | -0.17% | 26 | 196.95 | Town |
| Tupper Lake | 4 | 5,055 | 5,143 | -0.3% | 43 | 117.35 | Town |
| Saranac Lake | 5 | 4,813 | 4,958 | -0.6% | 1,653 | 2.91 | Village |
| Tupper Lake | 6 | 3,295 | 3,377 | -0.48% | 1,576 | 2.09 | Village |
| Moira | 7 | 2,839 | 2,912 | -0.6% | 63 | 45.23 | Town |
| Bangor | 8 | 2,191 | 2,230 | -0.45% | 51 | 43.12 | Town |
| Westville | 9 | 1,781 | 1,763 | 0.34% | 51 | 34.81 | Town |
| Chateaugay | 10 | 1,732 | 1,739 | 0.12% | 35 | 49.79 | Town |
| Fort Covington | 11 | 1,518 | 1,536 | -0.2% | 41 | 36.76 | Town |
| Constable | 12 | 1,504 | 1,481 | 0.53% | 46 | 32.82 | Town |
| Burke | 13 | 1,415 | 1,426 | -0.21% | 32 | 44.41 | Town |
| Bellmont | 14 | 1,300 | 1,322 | -0.38% | 8 | 164.14 | Town |
| Bombay | 15 | 1,246 | 1,252 | -0.24% | 35 | 35.74 | Town |
| Brighton | 16 | 1,148 | 1,397 | -8.82% | 15 | 77.90 | Town |
| Chateaugay | 17 | 740 | 749 | -0.27% | 683 | 1.08 | Village |
| Brushton | 18 | 431 | 440 | -0.46% | 1,562 | 0.28 | Village |
| Burke | 19 | 164 | 166 | 0% | 564 | 0.29 | Village |
Malone is the largest city in Franklin County, with a population of 11,882.
Burke is the smallest city in Franklin County.
There are 19 cities in Franklin County, New York.