11 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kalispell | Flathead County | 33,194 |
| King Arthur Park | Gallatin County | 2,357 |
| Kila | Flathead County | 452 |
| Kings Point | Lake County | 338 |
| Klein | Musselshell County | 283 |
| Kerr | Lake County | 227 |
| Kevin | Toole County | 165 |
| Kicking Horse | Lake County | 61 |
| Kremlin | Hill County | 55 |
| King Ranch Colony | Fergus County | 24 |
| Kingsbury Colony | Pondera County | 11 |