23 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Norman | Cleveland County | 132,425 |
| Newcastle | McClain County | 16,430 |
| Noble | Cleveland County | 8,152 |
| Nichols Hills | Oklahoma County | 3,841 |
| Nowata | Nowata County | 3,628 |
| New Cordell | Washita County | 2,732 |
| Nicoma Park | Oklahoma County | 2,284 |
| Newkirk | Kay County | 2,241 |
| Norwood | Cherokee County | 1,967 |
| North Enid | Garfield County | 996 |
| Ninnekah | Grady County | 838 |
| Nicut | Adair County | 631 |
| North Miami | Ottawa County | 297 |
| Notchietown | Muskogee County | 278 |
| New Eucha | Delaware County | 212 |
| Nash | Grant County | 186 |
| Nardin | Kay County | 171 |
| Narcissa | Craig County | 138 |
| Norge | Grady County | 130 |
| Nescatunga | Alfalfa County | 124 |
| New Alluwe | Craig County | 88 |
| Nelagoney | Osage County | 54 |
| Nashoba | Pushmataha County | 44 |