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 2020 Census Redistricting dataset. If 2020 Census data are not available for a geography, then the population data are from the Census’ 2019 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 10,014,009
2 San Diego County 3,298,634
3 Orange County 3,186,989
4 Riverside County 2,418,185
5 San Bernardino County 2,181,654
6 Santa Clara County 1,936,259
7 Alameda County 1,682,353
8 Sacramento County 1,585,055
9 Contra Costa County 1,165,927
10 Fresno County 1,008,654
11 Kern County 909,235
12 San Francisco County 873,965
13 Ventura County 843,843
14 San Joaquin County 779,233
15 San Mateo County 764,442
16 Stanislaus County 552,878
17 Sonoma County 488,863
18 Tulare County 473,117
19 Solano County 453,491
20 Santa Barbara County 448,229
21 Monterey County 439,035
22 Placer County 404,739
23 San Luis Obispo County 282,424
24 Merced County 281,202
25 Santa Cruz County 270,861
26 Marin County 262,321
27 Yolo County 216,403
28 Butte County 211,632
29 El Dorado County 191,185
30 Shasta County 182,155
31 Imperial County 179,702
32 Madera County 156,255
33 Kings County 152,486
34 Napa County 138,019
35 Humboldt County 136,463
36 Nevada County 102,241
37 Sutter County 99,633
38 Mendocino County 91,601
39 Yuba County 81,575
40 Lake County 68,163
41 Tehama County 65,829
42 San Benito County 64,209
43 Tuolumne County 55,620
44 Calaveras County 45,292
45 Siskiyou County 44,076
46 Amador County 40,474
47 Lassen County 32,730
48 Glenn County 28,917
49 Del Norte County 27,743
50 Colusa County 21,839
51 Plumas County 19,790
52 Inyo County 19,016
53 Mariposa County 17,131
54 Trinity County 16,112
55 Mono County 13,195
56 Modoc County 8,700
57 Sierra County 3,236
58 Alpine County 1,204

United States Census Bureau. B01001 SEX BY AGE, 2019 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 10 December 2020. http://www.census.gov/.

United States Census Bureau. "P2 Hispanic or Latino, and Not Hispanic or Latino by Race." 2020 Census State Redistricting Data (Public Law 94-171) Summary File. U.S. Census Bureau, 2020 Census. Web. 12 August 2021. https://www.census.gov/.

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