Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Fountain of Life Church of God | Church | 499 | Riverside | 33 44 14 N | 116 57 25 W |
| Fountain of Life Church of God in Christ | Church | 696 | Riverside | 33 55 37 N | 116 51 36 W |
| Fountain of Living Water Church | Church | 2 | Riverside | 33 43 09 N | 116 14 00 W |
| Fountain of Truth Church | Church | 320 | San Bernardino | 34 03 48 N | 117 27 58 W |
| Fountain of Youth Camp | Locale | 610 | Lake | 39 05 03 N | 123 03 18 W |
| Fountain of Youth Spring | Spring | 1335 | Siskiyou | 41 58 42 N | 122 42 35 W |
| Fountain Park Plaza | Park | 8 | Sacramento | 38 30 49 N | 121 26 39 W |
| Fountain Peak | Summit | 2123 | San Bernardino | 34 56 46 N | 115 32 15 W |
| Fountain Place | Populated Place | 2373 | El Dorado | 38 51 04 N | 119 56 03 W |
| Fountain Ranch | Locale | 153 | Mendocino | 38 56 15 N | 123 05 02 W |
| Fountain Shopping Center | Locale | 8 | Orange | 33 42 53 N | 117 58 23 W |
| Fountain Springs | Populated Place | 246 | Tulare | 35 53 28 N | 118 54 56 W |
| Fountain Springs Gulch | Valley | | Tulare | 35 58 49 N | 119 02 38 W |
| Fountain Square Shopping Center | Locale | 50 | Sacramento | 38 40 44 N | 121 17 57 W |
| Fountain Valley | Populated Place | 10 | Orange | 33 42 33 N | 117 57 13 W |
| Fountain Valley Branch Orange County Public Library | Building | 10 | Orange | 33 42 26 N | 117 57 01 W |
| Fountain Valley Channel | Canal | 4 | Orange | 33 41 26 N | 117 57 22 W |
| Fountain Valley City Hall | Building | 10 | Orange | 33 42 30 N | 117 57 03 W |
| Fountain Valley Commerce Center | Locale | 17 | Orange | 33 43 20 N | 117 55 13 W |
| Fountain Valley Fire Station Number 1 | Building | 8 | Orange | 33 42 19 N | 117 57 48 W |
| Fountain Valley Fire Station Number 2 | Building | 15 | Orange | 33 43 13 N | 117 55 43 W |
| Fountain Valley High School | School | 8 | Orange | 33 42 17 N | 117 57 41 W |
| Fountain Valley Mobile Home Estates (subdivision) | Populated Place | 5 | Orange | 33 41 58 N | 117 57 58 W |
| Fountain Valley Park | Park | 8 | Orange | 33 42 16 N | 117 57 50 W |
| Fountain Valley Plaza Shopping Center | Locale | 8 | Orange | 33 42 01 N | 117 57 10 W |
| Fountain Valley Promenade Shopping Center | Locale | 5 | Orange | 33 41 40 N | 117 57 23 W |
| Fountain Valley Recreational and Cultural Center | Building | 13 | Orange | 33 43 29 N | 117 57 14 W |
| Fountain Valley Regional Hospital and Medical Center | Hospital | 12 | Orange | 33 42 53 N | 117 56 04 W |
| Fountain Valley Regional Hospital Heliport | Airport | 12 | Orange | 33 42 54 N | 117 56 12 W |
| Fountain Valley School | School | 8 | Orange | 33 42 11 N | 117 57 47 W |
| Fountaingrove 1421 Dam | Dam | 150 | Sonoma | 38 29 12 N | 122 43 10 W |
| Fountaingrove Lake | Reservoir | 150 | Sonoma | 38 29 12 N | 122 43 10 W |
| Fountainhead Spring | Spring | 2011 | Los Angeles | 34 22 47 N | 118 01 42 W |
| Four Acres | Populated Place | 376 | Placer | 39 00 31 N | 120 47 19 W |
| Four Acres Sanitarium | Hospital | 80 | Fresno | 36 35 29 N | 119 47 32 W |
| Four Bit Gulch | Valley | | Siskiyou | 41 59 23 N | 123 29 32 W |
| Four Bits Creek | Stream | | Plumas | 39 46 50 N | 120 47 18 W |
| Four Brothers | Range | 1618 | Del Norte | 41 44 08 N | 123 47 34 W |
| Four Canyons | Flat | 2685 | Tulare | 36 20 34 N | 118 09 24 W |
| Four Cornered Peak | Summit | 2072 | El Dorado | 38 51 31 N | 120 17 21 W |
| Four Corners | Locale | 182 | Amador | 38 28 52 N | 120 55 53 W |
| Four Corners | Locale | 54 | Butte | 39 47 50 N | 121 54 11 W |
| Four Corners | Locale | 421 | El Dorado | 38 46 08 N | 120 55 32 W |
| Four Corners | Locale | 1328 | El Dorado | 38 53 12 N | 120 37 27 W |
| Four Corners | Locale | 1258 | Lassen | 41 07 26 N | 121 11 29 W |
| Four Corners | Locale | 141 | Madera | 37 00 38 N | 119 47 38 W |
| Four Corners | Locale | 223 | Marin | 37 53 36 N | 122 33 26 W |
| Four Corners | Locale | 417 | Mendocino | 39 58 23 N | 123 57 57 W |
| Four Corners | Locale | 62 | Merced | 37 29 37 N | 120 30 11 W |
| Four Corners | Locale | 421 | Napa | 38 33 11 N | 122 27 23 W |
| Four Corners | Locale | 760 | San Bernardino | 35 20 58 N | 116 35 40 W |
| Four Corners | Locale | 607 | San Bernardino | 34 08 08 N | 116 03 15 W |
| Four Corners | Locale | 1168 | San Diego | 32 43 29 N | 116 33 33 W |
| Four Corners | Locale | 2 | San Joaquin | 38 13 32 N | 121 26 51 W |
| Four Corners | Locale | 37 | Santa Barbara | 34 39 53 N | 120 25 24 W |
| Four Corners | Locale | 1280 | Siskiyou | 41 18 36 N | 121 51 30 W |
| Four Corners | Locale | 805 | Siskiyou | 41 37 27 N | 122 24 04 W |
| Four Corners | Populated Place | 15 | Contra Costa | 37 57 23 N | 122 02 22 W |
| Four Corners | Populated Place | 587 | San Diego | 32 58 40 N | 116 46 38 W |
| Four Corners | Populated Place | 971 | Shasta | 40 56 18 N | 121 36 24 W |
| Four Corners | Populated Place | 913 | Shasta | 40 59 55 N | 121 37 54 W |
| Four Corners | Populated Place | 17 | Sonoma | 38 16 33 N | 122 27 39 W |
| Four Corners Lake Snowmobile Park | Locale | 1596 | Siskiyou | 41 38 23 N | 121 44 08 W |
| Four Corners Rock | Pillar | 1612 | Trinity | 40 05 29 N | 123 09 25 W |
| Four Fathom Bank | Bar | -2 | Marin | 37 49 14 N | 122 33 47 W |
| Four Forks Creek | Stream | | Fresno | 37 23 55 N | 119 06 48 W |
| Four Gables | Summit | 3874 | Inyo | 37 18 22 N | 118 41 43 W |
| Four H Club Camp | Locale | 1915 | Nevada | 39 20 04 N | 120 30 45 W |
| Four Hills Mine | Mine | 2186 | Sierra | 39 41 56 N | 120 42 37 W |
| Four Horsemen Prospect | Mine | 2470 | Inyo | 37 05 57 N | 118 03 07 W |
| Four Jacks Mine | Mine | 596 | Mariposa | 37 37 32 N | 120 07 48 W |
| Four Jeffrey Campground | Locale | 2475 | Inyo | 37 14 55 N | 118 34 13 W |
| Four Lakes | Lake | 2514 | El Dorado | 38 44 38 N | 120 00 58 W |
| Four Lantern Flat | Flat | 1122 | Tehama | 40 08 36 N | 121 41 54 W |
| Four Mile Beach | Beach | 3 | Santa Cruz | 36 57 59 N | 122 07 22 W |
| Four Mile Canyon | Valley | | Alpine | 38 26 42 N | 119 35 42 W |
| Four Mile Trail | Trail | 2162 | Mariposa | 37 43 57 N | 119 34 53 W |
| Four Mules Mine | Mine | 1430 | Inyo | 36 48 34 N | 118 03 50 W |
| Four Oaks Mine | Mine | 1886 | Kern | 35 23 30 N | 118 19 59 W |
| Four Oaks Park | Park | 43 | Orange | 33 30 10 N | 117 38 32 W |
| Four Palms Spring | Spring | 37 | Imperial | 33 16 52 N | 116 01 37 W |
| Four Pine Spring | Spring | 1955 | Lassen | 40 57 14 N | 120 49 32 W |
| Four Pines | Populated Place | 1327 | Lake | 39 36 36 N | 123 00 46 W |
| Four Points | Populated Place | 841 | Los Angeles | 34 32 33 N | 118 01 48 W |
| Four S Ranch | Locale | 363 | Orange | 33 41 13 N | 117 36 53 W |
| Four Springs Gulch | Valley | | Kern | 35 40 01 N | 118 52 45 W |
| Four Square Church | Church | 26 | Alameda | 37 40 38 N | 122 05 29 W |
| Four Square Church | Church | 60 | Butte | 39 44 40 N | 121 50 59 W |
| Four Square Church | Church | 8 | San Mateo | 37 34 09 N | 122 19 60 W |
| Four Square Church (historical) | Church | 73 | San Luis Obispo | 35 15 53 N | 120 39 11 W |
| Four Square Gospel Church | Church | 111 | Fresno | 36 42 14 N | 119 33 30 W |
| Four Square Gospel Church | Church | 85 | Tehama | 39 55 40 N | 122 11 17 W |
| Four Square Gospel Church | Church | 83 | Ventura | 34 21 11 N | 119 03 30 W |
| Four Square Gospel Church (historical) | Church | | Orange | 33 49 47 N | 117 55 48 W |
| Four Square Gospel Church (historical) | Church | 210 | Riverside | 33 52 28 N | 117 34 03 W |
| Four Square Gospel Tabernacle | Church | 65 | Los Angeles | 33 57 53 N | 118 02 19 W |
| Four Square Light House Church | Church | 35 | Mendocino | 39 21 57 N | 123 48 52 W |
| Four Trees | Locale | 1569 | Plumas | 39 48 47 N | 121 19 12 W |
| Four Trees School | School | 27 | San Joaquin | 37 50 47 N | 121 03 10 W |
| Four Weirs | Dam | 129 | Kern | 35 24 01 N | 119 00 26 W |
| Four Winds Pre-School | School | 226 | Ventura | 34 26 51 N | 119 14 35 W |
| Four-H Camp | Locale | 405 | Santa Barbara | 34 31 53 N | 119 45 33 W |
| Four-Q Lakes | Lake | 2284 | El Dorado | 38 56 35 N | 120 12 09 W |
| Four-S Ranch | Locale | 74 | Imperial | 33 03 07 N | 114 40 44 W |
| Four-S Ranch | Locale | 184 | San Diego | 33 01 02 N | 117 06 58 W |
| Four-T Ranch | Locale | 775 | Nevada | 39 22 17 N | 121 02 48 W |
| Fourbit Gulch | Valley | | Trinity | 40 29 40 N | 123 03 26 W |
| Fourfork Creek | Stream | | Ventura | 34 27 38 N | 118 54 39 W |
| Fourmile Bend | Bend | 10 | Yolo | 38 50 30 N | 121 43 42 W |
| Fourmile Butte | Summit | 1645 | Siskiyou | 41 55 01 N | 123 18 59 W |