| City | County | 2026 Pop. ↓ |
|---|---|---|
| Kingfisher | Kingfisher County | 5,256 |
| Kiefer | Creek County | 2,334 |
| Krebs | Pittsburg County | 2,066 |
| Kingston | Marshall County | 1,493 |
| Kenwood | Delaware County | 1,479 |
| Konawa | Seminole County | 1,230 |
| Keys | Cherokee County | 1,061 |
| Kellyville | Creek County | 1,055 |
| Keefton | Muskogee County | 1,001 |
| Kansas | Delaware County | 766 |
| Kiowa | Pittsburg County | 624 |
| Ketchum | Mayes County | 517 |
| Keota | Haskell County | 444 |
| Katie | Garvin County | 351 |
| Kaw City | Kay County | 322 |
| Kinta | Haskell County | 279 |
| Kremlin | Garfield County | 248 |
| Keyes | Cimarron County | 238 |
| Kenefic | Johnston County | 164 |
| Kemp | Bryan County | 137 |
| Kendrick | Creek County | 96 |
| Kildare | Kay County | 92 |
| Knowles | Beaver County | 5 |