15 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Jamestown | Chautauqua County | 27,212 |
| Johnson City | Broome County | 14,483 |
| Johnstown | Fulton County | 7,952 |
| Johnstown | Fulton County | 6,252 |
| Jerusalem | Yates County | 4,142 |
| Jay | Essex County | 2,511 |
| Johnsburg | Warren County | 2,138 |
| Java | Wyoming County | 1,934 |
| Jackson | Washington County | 1,711 |
| Jasper | Steuben County | 1,374 |
| Junius | Seneca County | 1,373 |
| Jefferson | Schoharie County | 1,347 |
| Jordan | Onondaga County | 1,198 |
| Jewett | Greene County | 837 |
| Jeffersonville | Sullivan County | 391 |