11 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kalispell | Flathead County | 32,803 |
| King Arthur Park | Gallatin County | 2,590 |
| Kerr | Lake County | 460 |
| Kila | Flathead County | 408 |
| Kings Point | Lake County | 407 |
| Klein | Musselshell County | 311 |
| Kevin | Toole County | 163 |
| Kremlin | Hill County | 38 |
| Kicking Horse | Lake County | 36 |
| King Ranch Colony | Fergus County | 27 |
| Kingsbury Colony | Pondera County | 10 |