K
- Kannah
- Karval
- Kassler
- Kearns
- Keenesburg
- Keesee
- Kelim
- Kelker
- Keller
- Kellytown
- Ken Caryl
- Kenyon Corner
- Keota
- Kersey
- Keystone
- Kim
- King Center
- Kings Canyon
- Kings Corner
- Kinikinik
- Kiowa
- Kirk
- Kirkland
- Kirkwell
- Kit Carson
- Kittredge
- Kline
- Knob Hill
- Kobe
- Kokomo
- Kornman
- Krauss
- Kremmling
- Kreybill
- Kuhlman Heights
- Kuner
- Kutch