- Kalispell
- Keiley
- Kelley
- Kelly Island
- Kelly Island
- Kenilworth
- Kens Trailer Court
- Kenspur
- Kerns
- Kerr
- Kershaw
- Kevin
- Keystone
- Kicking Horse
- Kidd
- Kila
- Kilby Butte Colony
- King Arthur Park
- King Colony Ranch
- King Island
- Kingley
- Kingrey Place
- Kings Point
- Kingsbury Colony
- Kingston
- Kins Island (historical)
- Kinsey
- Kiowa
- Kippen
- Kirby