23 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Norman | Cleveland County | 131,717 |
| Newcastle | McClain County | 15,553 |
| Noble | Cleveland County | 7,965 |
| Nichols Hills | Oklahoma County | 3,846 |
| Nowata | Nowata County | 3,610 |
| New Cordell | Washita County | 2,738 |
| Nicoma Park | Oklahoma County | 2,289 |
| Newkirk | Kay County | 2,242 |
| Norwood | Cherokee County | 1,752 |
| North Enid | Garfield County | 999 |
| Ninnekah | Grady County | 829 |
| Nicut | Adair County | 345 |
| New Eucha | Delaware County | 311 |
| North Miami | Ottawa County | 296 |
| Notchietown | Muskogee County | 279 |
| Nash | Grant County | 186 |
| Nescatunga | Alfalfa County | 161 |
| Nardin | Kay County | 140 |
| Narcissa | Craig County | 139 |
| Norge | Grady County | 127 |
| New Alluwe | Craig County | 88 |
| Nelagoney | Osage County | 76 |
| Nashoba | Pushmataha County | 56 |