- Kinneloa Mesa
- Kinyon
- Kirkville
- Kirkwood
- Kiska
- Kismet
- Kister
- Kit Carson
- Kiva Beach
- Klamath Glen
- Klamath River
- Klamath River
- Klau
- Klinefelter
- Klondike
- Kneeland
- Knight Island
- Knights Ferry
- Knights Landing
- Knob
- Knowles
- Knowles Corner
- Knowles Junction
- Knoxville
- Komandorski Village
- Korbel
- Korbel
- Korblex
- Kramer
- Kramer Hills