California Counties by Population

Below are the 58 California counties sorted by population from largest to smallest. The population data are from the 2022 Population Estimates Program and 2021 American Community Survey.

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Rank County Population
1 Los Angeles County 9,721,138
2 San Diego County 3,276,208
3 Orange County 3,151,184
4 Riverside County 2,473,902
5 San Bernardino County 2,193,656
6 Santa Clara County 1,870,945
7 Alameda County 1,628,997
8 Sacramento County 1,584,169
9 Contra Costa County 1,156,966
10 Fresno County 1,015,190
11 Kern County 916,108
12 Ventura County 832,605
13 San Francisco County 808,437
14 San Joaquin County 793,229
15 San Mateo County 729,181
16 Stanislaus County 551,275
17 Sonoma County 482,650
18 Tulare County 477,544
19 Solano County 448,747
20 Santa Barbara County 443,837
21 Monterey County 432,858
22 Placer County 417,772
23 Merced County 290,014
24 San Luis Obispo County 282,013
25 Santa Cruz County 264,370
26 Marin County 256,018
27 Yolo County 222,115
28 Butte County 207,303
29 El Dorado County 192,646
30 Shasta County 180,930
31 Imperial County 178,713
32 Madera County 160,256
33 Kings County 152,981
34 Humboldt County 135,010
35 Napa County 134,300
36 Nevada County 102,293
37 Sutter County 98,503
38 Mendocino County 89,783
39 Yuba County 84,310
40 Lake County 68,191
41 San Benito County 67,579
42 Tehama County 65,245
43 Tuolumne County 54,531
44 Calaveras County 46,563
45 Siskiyou County 43,660
46 Amador County 41,412
47 Lassen County 29,904
48 Glenn County 28,339
49 Del Norte County 27,082
50 Colusa County 21,914
51 Plumas County 19,351
52 Inyo County 18,718
53 Mariposa County 17,020
54 Trinity County 15,781
55 Mono County 12,978
56 Modoc County 8,511
57 Sierra County 3,217
58 Alpine County 1,190

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/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2022. U.S. Census Bureau, Population Division. Web. May 2023. http://www.census.gov/.

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