| City | County | 2026 Pop. ↓ |
|---|---|---|
| Norman | Cleveland County | 131,616 |
| Newcastle | McClain County | 16,079 |
| Noble | Cleveland County | 7,934 |
| Nichols Hills | Oklahoma County | 3,862 |
| Nowata | Nowata County | 3,601 |
| Nicoma Park | Oklahoma County | 2,289 |
| Newkirk | Kay County | 2,248 |
| Norwood | Cherokee County | 1,967 |
| North Enid | Garfield County | 997 |
| Ninnekah | Grady County | 842 |
| Nicut | Adair County | 631 |
| North Miami | Ottawa County | 295 |
| Notchietown | Muskogee County | 278 |
| New Eucha | Delaware County | 212 |
| Nash | Grant County | 182 |
| Nardin | Kay County | 171 |
| Narcissa | Craig County | 138 |
| Norge | Grady County | 127 |
| Nescatunga | Alfalfa County | 124 |
| New Alluwe | Craig County | 87 |
| Nelagoney | Osage County | 54 |
| Nashoba | Pushmataha County | 44 |