- Fontana (9,614 Companies)
- Foothill Ranch (959 Companies)
- Forbestown (18 Companies)
- Forest Falls (23 Companies)
- Forest Knolls (19 Companies)
- Forest Ranch (31 Companies)
- Foresthill (181 Companies)
- Forestville (297 Companies)
- Forks Of Salmon (17 Companies)
- Fort Bidwell (5 Companies)
- Fort Bragg (1,563 Companies)
- Fort Irwin (42 Companies)
- Fort Jones (177 Companies)
- Fortuna (1,282 Companies)
- Foster City (187 Companies)
- Fountain Valley (5,100 Companies)
- Fowler (448 Companies)
- Frazier Park (168 Companies)
- Freedom (517 Companies)
- Fremont (13,020 Companies)
- French Camp (307 Companies)
- French Gulch (7 Companies)
- Fresno (39,340 Companies)
- Friant (49 Companies)
- Fullerton (9,737 Companies)
- Fulton (65 Companies)
- Galt (1,152 Companies)
- Garberville (332 Companies)
- Garden Grove (10,870 Companies)
- Garden Valley (120 Companies)
- Gardena (10,793 Companies)
- Gasquet (17 Companies)
- Gaviota (4 Companies)
- Gazelle (2 Companies)
