- Folsom
- Folsom Junction
- Fondo
- Fontana
- Fontenay Villa
- Foothill Farms
- Foothill Ranch
- Foppiano
- Forbestown
- Ford City
- Forebay
- Forest
- Forest Falls
- Forest Glen
- Forest Hills
- Forest Knolls
- Forest Knolls
- Forest Lake
- Forest Meadows
- Forest Park
- Forest Park
- Forest Ranch
- Forest Springs
- Foresta
- Foresthill
- Forestville
- Forks of Salmon
- Fornis
- Fort Bidwell
- Fort Bragg