15 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Jamestown | Chautauqua County | 27,455 |
| Johnson City | Broome County | 14,590 |
| Johnstown | Fulton County | 7,989 |
| Johnstown | Fulton County | 6,281 |
| Jerusalem | Yates County | 4,171 |
| Jay | Essex County | 2,502 |
| Johnsburg | Warren County | 2,139 |
| Java | Wyoming County | 1,939 |
| Jackson | Washington County | 1,709 |
| Jasper | Steuben County | 1,378 |
| Junius | Seneca County | 1,370 |
| Jefferson | Schoharie County | 1,346 |
| Jordan | Onondaga County | 1,203 |
| Jewett | Greene County | 847 |
| Jeffersonville | Sullivan County | 391 |