12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Indian Lake | 1 | 1,366 | 1,355 | 0.29% | 5 | 252 | Town |
| Lake Pleasant | 2 | 898 | 894 | 0.11% | 5 | 188 | Town |
| Long Lake | 3 | 798 | 784 | 0.76% | 2 | 407 | Town |
| Wells | 4 | 714 | 521 | 7.21% | 92 | 8 | CDP |
| Long Lake | 5 | 696 | 374 | 1.46% | 74 | 9 | CDP |
| Wells | 6 | 666 | 681 | -0.3% | 4 | 177 | Town |
| Hope | 7 | 412 | 402 | 0.98% | 10 | 41 | Town |
| Speculator | 8 | 399 | 401 | -0.25% | 9 | 45 | Village |
| Inlet | 9 | 357 | 352 | -0.28% | 6 | 62 | Town |
| Arietta | 10 | 288 | 290 | 0% | 1 | 317 | Town |
| Benson | 11 | 221 | 222 | 0.45% | 3 | 83 | Town |
| Morehouse | 12 | 88 | 90 | -1.12% | 0.00 | 191 | Town |
Indian Lake is the largest city in Hamilton County, with a population of 1,366.
Morehouse is the smallest city in Hamilton County, with a population of 88.
There are 12 cities in Hamilton County, New York.