California / Counties by Population

California Counties by Population

Below are the 58 California counties sorted by population from largest to smallest. The population data are from the 2021 American Community Survey. You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

Rank County Population
1 Los Angeles County 10,019,635
2 San Diego County 3,296,317
3 Orange County 3,182,923
4 Riverside County 2,409,331
5 San Bernardino County 2,171,071
6 Santa Clara County 1,932,022
7 Alameda County 1,673,133
8 Sacramento County 1,571,767
9 Contra Costa County 1,161,643
10 Fresno County 1,003,150
11 Kern County 905,644
12 San Francisco County 865,933
13 Ventura County 845,255
14 San Joaquin County 771,406
15 San Mateo County 762,488
16 Stanislaus County 550,842
17 Sonoma County 492,498
18 Tulare County 470,999
19 Solano County 451,432
20 Santa Barbara County 447,651
21 Monterey County 438,953
22 Placer County 400,330
23 San Luis Obispo County 282,771
24 Merced County 279,150
25 Santa Cruz County 272,138
26 Marin County 262,387
27 Butte County 217,884
28 Yolo County 216,703
29 El Dorado County 190,568
30 Shasta County 181,935
31 Imperial County 180,051
32 Madera County 156,304
33 Kings County 151,887
34 Napa County 138,795
35 Humboldt County 137,014
36 Nevada County 102,090
37 Sutter County 99,080
38 Mendocino County 91,534
39 Yuba County 80,404
40 Lake County 67,749
41 Tehama County 65,345
42 San Benito County 63,329
43 Tuolumne County 55,243
44 Calaveras County 45,349
45 Siskiyou County 44,151
46 Amador County 40,095
47 Lassen County 32,949
48 Glenn County 28,675
49 Del Norte County 27,655
50 Colusa County 21,780
51 Plumas County 19,631
52 Inyo County 18,804
53 Mariposa County 17,225
54 Trinity County 15,818
55 Mono County 13,291
56 Modoc County 8,723
57 Sierra County 3,079
58 Alpine County 1,344

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022. http://www.census.gov/.

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