California Counties by Population

Below are the 58 California counties sorted by population from largest to smallest. The population data are from the 2022 American Community Survey.

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Rank County Population
1 Los Angeles County 9,936,690
2 San Diego County 3,289,701
3 Orange County 3,175,227
4 Riverside County 2,429,487
5 San Bernardino County 2,180,563
6 Santa Clara County 1,916,831
7 Alameda County 1,663,823
8 Sacramento County 1,579,211
9 Contra Costa County 1,162,648
10 Fresno County 1,008,280
11 Kern County 906,883
12 San Francisco County 851,036
13 Ventura County 842,009
14 San Joaquin County 779,445
15 San Mateo County 754,250
16 Stanislaus County 552,063
17 Sonoma County 488,436
18 Tulare County 473,446
19 Solano County 450,995
20 Santa Barbara County 445,213
21 Monterey County 437,609
22 Placer County 406,608
23 Merced County 282,290
24 San Luis Obispo County 281,712
25 Santa Cruz County 268,571
26 Marin County 260,485
27 Yolo County 217,141
28 Butte County 213,605
29 El Dorado County 191,713
30 Shasta County 181,852
31 Imperial County 179,578
32 Madera County 157,243
33 Kings County 152,515
34 Napa County 137,384
35 Humboldt County 136,132
36 Nevada County 102,322
37 Sutter County 99,101
38 Mendocino County 91,145
39 Yuba County 81,705
40 Lake County 68,024
41 Tehama County 65,484
42 San Benito County 64,753
43 Tuolumne County 54,993
44 Calaveras County 45,674
45 Siskiyou County 44,049
46 Amador County 40,577
47 Lassen County 31,873
48 Glenn County 28,657
49 Del Norte County 27,462
50 Colusa County 21,811
51 Plumas County 19,650
52 Inyo County 18,829
53 Mariposa County 17,130
54 Trinity County 15,889
55 Mono County 13,219
56 Modoc County 8,651
57 Sierra County 2,916
58 Alpine County 1,515

United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023. http://www.census.gov/.

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