| Rank |
County |
Population Density |
| 1 |
San Francisco County, California
|
17,179.1
|
| 2 |
Orange County, California
|
3,807.7
|
| 3 |
Los Angeles County, California
|
2,419.6
|
| 4 |
Alameda County, California
|
2,043.6
|
| 5 |
San Mateo County, California
|
1,602.2
|
| 6 |
Sacramento County, California
|
1,470.8
|
| 7 |
Contra Costa County, California
|
1,465.2
|
| 8 |
Santa Clara County, California
|
1,381
|
| 9 |
San Diego County, California
|
735.8
|
| 10 |
Santa Cruz County, California
|
589.4
|
| 11 |
Solano County, California
|
503
|
| 12 |
San Joaquin County, California
|
492.6
|
| 13 |
Marin County, California
|
485.1
|
| 14 |
Ventura County, California
|
446.7
|
| 15 |
Stanislaus County, California
|
344.2
|
| 16 |
Sonoma County, California
|
307.1
|
| 17 |
Riverside County, California
|
303.8
|
| 18 |
Placer County, California
|
247.6
|
| 19 |
Yolo County, California
|
197.9
|
| 20 |
Napa County, California
|
182.4
|
| 21 |
Sutter County, California
|
157.3
|
| 22 |
Fresno County, California
|
156.2
|
| 23 |
Santa Barbara County, California
|
155
|
| 24 |
Butte County, California
|
134.4
|
| 25 |
Merced County, California
|
132.2
|
| 26 |
Monterey County, California
|
126.5
|
| 27 |
Yuba County, California
|
114.2
|
| 28 |
Kings County, California
|
110.1
|
| 29 |
El Dorado County, California
|
106
|
| 30 |
Kern County, California
|
103.3
|
| 31 |
Nevada County, California
|
103.1
|
| 32 |
San Bernardino County, California
|
101.5
|
| 33 |
Tulare County, California
|
91.7
|
| 34 |
San Luis Obispo County, California
|
81.7
|
| 35 |
Madera County, California
|
70.6
|
| 36 |
Amador County, California
|
64.1
|
| 37 |
Lake County, California
|
51.5
|
| 38 |
Shasta County, California
|
46.9
|
| 39 |
Calaveras County, California
|
44.7
|
| 40 |
Imperial County, California
|
41.8
|
| 41 |
San Benito County, California
|
39.8
|
| 42 |
Humboldt County, California
|
37.7
|
| 43 |
Del Norte County, California
|
28.4
|
| 44 |
Mendocino County, California
|
25.1
|
| 45 |
Tuolumne County, California
|
24.9
|
| 46 |
Tehama County, California
|
21.5
|
| 47 |
Glenn County, California
|
21.4
|
| 48 |
Colusa County, California
|
18.6
|
| 49 |
Mariposa County, California
|
12.6
|
| 50 |
Plumas County, California
|
7.8
|
| 51 |
Lassen County, California
|
7.7
|
| 52 |
Siskiyou County, California
|
7.2
|
| 53 |
Mono County, California
|
4.7
|
| 54 |
Trinity County, California
|
4.3
|
| 55 |
Sierra County, California
|
3.4
|
| 56 |
Modoc County, California
|
2.5
|
| 57 |
Inyo County, California
|
1.8
|
| 58 |
Alpine County, California
|
1.6
|