California / Counties by Population

California Counties by Population

Below are the 58 California counties sorted by population from 1 to 58 . The population data are from the 2021 Population Estimates Program and 2020 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!

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Rank County Population
1 Los Angeles County 9,829,544
2 San Diego County 3,286,069
3 Orange County 3,167,809
4 Riverside County 2,458,395
5 San Bernardino County 2,194,710
6 Santa Clara County 1,885,508
7 Alameda County 1,648,556
8 Sacramento County 1,588,921
9 Contra Costa County 1,161,413
10 Fresno County 1,013,581
11 Kern County 917,673
12 Ventura County 839,784
13 San Francisco County 815,201
14 San Joaquin County 789,410
15 San Mateo County 737,888
16 Stanislaus County 552,999
17 Sonoma County 485,887
18 Tulare County 477,054
19 Solano County 451,716
20 Santa Barbara County 446,475
21 Monterey County 437,325
22 Placer County 412,300
23 Merced County 286,461
24 San Luis Obispo County 283,159
25 Santa Cruz County 267,792
26 Marin County 260,206
27 Yolo County 216,986
28 Butte County 208,309
29 El Dorado County 193,221
30 Shasta County 182,139
31 Imperial County 179,851
32 Madera County 159,410
33 Kings County 153,443
34 Humboldt County 136,310
35 Napa County 136,207
36 Nevada County 103,487
37 Sutter County 99,063
38 Mendocino County 91,305
39 Yuba County 83,421
40 Lake County 68,766
41 San Benito County 66,677
42 Tehama County 65,498
43 Tuolumne County 55,810
44 Calaveras County 46,221
45 Siskiyou County 44,118
46 Amador County 41,259
47 Lassen County 33,159
48 Glenn County 28,805
49 Del Norte County 28,100
50 Colusa County 21,917
51 Plumas County 19,915
52 Inyo County 18,970
53 Mariposa County 17,147
54 Trinity County 16,060
55 Mono County 13,247
56 Modoc County 8,661
57 Sierra County 3,283
58 Alpine County 1,235

United States Census Bureau. B01001 SEX BY AGE, 2020 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 17 March 2022. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2021. U.S. Census Bureau, Population Division. Web. May 2022. http://www.census.gov/.

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