Founded in 1816, Hamilton County is one of 62 counties in the state of New York. Historically, Hamilton County was formed from Montgomery County. The city of Lake Pleasant is the county seat. With FIPS code of 41, Hamilton County has a population of 5,119 and area of 1,808 square miles (4,683 km2).
List of all cities in Hamilton County, NY alphabetically
| City/Town | Postal Code | Area Code |
| Arietta, NY | 12139 | 518 |
| Blue Mountain Lake, NY | 12812 | 518 |
| Brandreth, NY | 12847 | 518 |
| Brightside, NY | 13436 | 315 |
| Gilmantown, NY | 12190 | 518 |
| Higgins Bay, NY | 12108 | 518 |
| Hoffmeister, NY | 13353 | 315 |
| Indian Lake, NY | 12842 | 518 |
| Inlet, NY | 13360 | 315 |
| Lake Pleasant, NY | 12108 | 518 |
| Long Lake, NY | 12847 | 518 |
| Piseco, NY | 12139 | 518 |
| Raquette Lake, NY | 13436 | 315 |
| Sabael, NY | 12864 | 518 |
| Sabattis, NY | 12847 | 518 |
| Speculator, NY | 12164 | 518 |
| Wells, NY | 12190 | 518 |