12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Indian Lake town | 1 | 1,346 | 1,355 | -0.44% | 5 | 251.77 | Town |
| Lake Pleasant town | 2 | 881 | 896 | -0.9% | 5 | 187.98 | Town |
| Long Lake town | 3 | 778 | 784 | -0.64% | 2 | 407.03 | Town |
| Wells | 4 | 714 | 521 | 7.21% | 92 | 7.72 | CDP |
| Long Lake | 5 | 696 | 374 | 1.46% | 74 | 9.35 | CDP |
| Wells town | 6 | 651 | 682 | -1.51% | 4 | 176.83 | Town |
| Speculator | 7 | 400 | 404 | -0.25% | 9 | 44.61 | Village |
| Hope town | 8 | 400 | 402 | -0.5% | 10 | 40.70 | Town |
| Inlet town | 9 | 357 | 352 | -0.28% | 6 | 62.19 | Town |
| Arietta town | 10 | 284 | 294 | -1.39% | 1 | 317.18 | Town |
| Benson town | 11 | 217 | 222 | -0.91% | 3 | 82.62 | Town |
| Morehouse town | 12 | 90 | 92 | -1.1% | 0.00 | 191.06 | Town |
Indian Lake town is the largest city in Hamilton County, with a population of 1,346.
Morehouse town is the smallest city in Hamilton County.
There are 12 cities in Hamilton County, New York.