11 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Kalispell | Flathead County | 34,310 |
| King Arthur Park | Gallatin County | 2,713 |
| Kerr | Lake County | 474 |
| Kings Point | Lake County | 424 |
| Kila | Flathead County | 409 |
| Klein | Musselshell County | 321 |
| Kevin | Toole County | 165 |
| Kremlin | Hill County | 41 |
| King Ranch Colony | Fergus County | 28 |
| Kicking Horse | Lake County | 19 |
| Kingsbury Colony | Pondera County | 11 |