15 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Jamestown | Chautauqua County | 27,497 |
| Johnson City | Broome County | 14,616 |
| Johnstown | Fulton County | 8,047 |
| Johnstown town | Fulton County | 6,336 |
| Jerusalem town | Yates County | 4,194 |
| Jay town | Essex County | 2,506 |
| Johnsburg town | Warren County | 2,173 |
| Java town | Wyoming County | 1,928 |
| Jackson town | Washington County | 1,693 |
| Jasper town | Steuben County | 1,371 |
| Jefferson town | Schoharie County | 1,355 |
| Junius town | Seneca County | 1,342 |
| Jordan | Onondaga County | 1,188 |
| Jewett town | Greene County | 854 |
| Jeffersonville | Sullivan County | 392 |