23 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Norman | Cleveland County | 131,302 |
| Newcastle | McClain County | 15,888 |
| Noble | Cleveland County | 8,207 |
| Nichols Hills | Oklahoma County | 3,798 |
| Nowata | Nowata County | 3,575 |
| New Cordell | Washita County | 2,682 |
| Nicoma Park | Oklahoma County | 2,272 |
| Newkirk | Kay County | 2,184 |
| Norwood | Cherokee County | 1,752 |
| North Enid | Garfield County | 988 |
| Ninnekah | Grady County | 822 |
| Nicut | Adair County | 345 |
| New Eucha | Delaware County | 311 |
| North Miami | Ottawa County | 298 |
| Notchietown | Muskogee County | 279 |
| Nash | Grant County | 184 |
| Nescatunga | Alfalfa County | 161 |
| Nardin | Kay County | 140 |
| Narcissa | Craig County | 139 |
| Norge | Grady County | 128 |
| New Alluwe | Craig County | 89 |
| Nelagoney | Osage County | 76 |
| Nashoba | Pushmataha County | 56 |