- Kister
- Kramm
- Klamath Glen
- Kaweah
- Kecks Corner
- Kelso
- Kilkare Woods
- Kit Carson
- Klamath River
- Kneeland
- Knights Landing
- Knob
- Knoxville
- Komandorski Village
- Korbel
- Kramer Junction
- Kyburz
- Kings Island
- Kelsey
- Kiva Beach
- Kanawyers
- Keller Place
- Kirkwood
- King Salmon
- Korblex
- Kane Spring
- Kearsarge
- Keough Hot Springs
- Kern Lake
- Kernell