| Rank |
County |
Land Area |
| 1 |
San Bernardino County, California
|
20,056.9
|
| 2 |
Inyo County, California
|
10,180.9
|
| 3 |
Kern County, California
|
8,131.9
|
| 4 |
Riverside County, California
|
7,206.5
|
| 5 |
Siskiyou County, California
|
6,277.9
|
| 6 |
Fresno County, California
|
5,958.0
|
| 7 |
Tulare County, California
|
4,824.2
|
| 8 |
Lassen County, California
|
4,541.2
|
| 9 |
San Diego County, California
|
4,206.6
|
| 10 |
Imperial County, California
|
4,176.6
|
| 11 |
Los Angeles County, California
|
4,057.9
|
| 12 |
Modoc County, California
|
3,917.8
|
| 13 |
Shasta County, California
|
3,775.4
|
| 14 |
Humboldt County, California
|
3,568.0
|
| 15 |
Mendocino County, California
|
3,506.3
|
| 16 |
San Luis Obispo County, California
|
3,298.6
|
| 17 |
Monterey County, California
|
3,280.6
|
| 18 |
Trinity County, California
|
3,179.2
|
| 19 |
Mono County, California
|
3,049.0
|
| 20 |
Tehama County, California
|
2,949.7
|
| 21 |
Santa Barbara County, California
|
2,735.1
|
| 22 |
Plumas County, California
|
2,553.0
|
| 23 |
Tuolumne County, California
|
2,220.9
|
| 24 |
Madera County, California
|
2,137.1
|
| 25 |
Merced County, California
|
1,935.0
|
| 26 |
Ventura County, California
|
1,843.1
|
| 27 |
El Dorado County, California
|
1,707.9
|
| 28 |
Butte County, California
|
1,636.5
|
| 29 |
Sonoma County, California
|
1,575.8
|
| 30 |
Stanislaus County, California
|
1,494.8
|
| 31 |
Mariposa County, California
|
1,448.8
|
| 32 |
Placer County, California
|
1,407.0
|
| 33 |
San Joaquin County, California
|
1,391.3
|
| 34 |
Kings County, California
|
1,389.4
|
| 35 |
San Benito County, California
|
1,388.7
|
| 36 |
Glenn County, California
|
1,314.0
|
| 37 |
Santa Clara County, California
|
1,290.1
|
| 38 |
Lake County, California
|
1,256.5
|
| 39 |
Colusa County, California
|
1,150.7
|
| 40 |
Calaveras County, California
|
1,020.0
|
| 41 |
Yolo County, California
|
1,014.7
|
| 42 |
Del Norte County, California
|
1,006.4
|
| 43 |
Sacramento County, California
|
964.6
|
| 44 |
Nevada County, California
|
957.8
|
| 45 |
Sierra County, California
|
953.2
|
| 46 |
Solano County, California
|
821.8
|
| 47 |
Orange County, California
|
790.6
|
| 48 |
Napa County, California
|
748.4
|
| 49 |
Alameda County, California
|
739.0
|
| 50 |
Alpine County, California
|
738.3
|
| 51 |
Contra Costa County, California
|
715.9
|
| 52 |
Yuba County, California
|
631.8
|
| 53 |
Sutter County, California
|
602.4
|
| 54 |
Amador County, California
|
594.6
|
| 55 |
Marin County, California
|
520.3
|
| 56 |
San Mateo County, California
|
448.4
|
| 57 |
Santa Cruz County, California
|
445.2
|
| 58 |
San Francisco County, California
|
46.9
|