The most populated counties in California are Los Angeles County with 9,936,690, San Diego County at 3,289,701, Orange County with 3,175,227, Riverside County at 2,429,487, and San Bernardino County with 2,180,563. You can get the most current Census population data for all 58 California counties, sorted from the most populous counties in California to the least, according to 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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