Population in California by County

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

California

39,287,377

Counties

58

Highest

Los Angeles

9,808,667

Lowest

Alpine

1,616

All California counties, ranked

# Counties Population
1 Los Angeles 9,808,667
2 San Diego 3,288,774
3 Orange 3,165,820
4 Riverside 2,478,600
5 San Bernardino 2,197,104
6 Santa Clara 1,902,047
7 Alameda 1,649,473
8 Sacramento 1,594,006
9 Contra Costa 1,165,012
10 Fresno 1,016,725
11 Kern 915,075
12 Ventura 837,469
13 San Francisco 830,235
14 San Joaquin 797,334
15 San Mateo 742,340
16 Stanislaus 553,990
17 Sonoma 485,040
18 Tulare 478,693
19 Solano 451,918
20 Santa Barbara 443,701
21 Monterey 437,613
22 Placer 419,156
23 Merced 290,201
24 San Luis Obispo 281,555
25 Santa Cruz 264,926
26 Marin 257,969
27 Yolo 220,564
28 Butte 207,929
29 El Dorado 192,662
30 Shasta 181,436
31 Imperial 180,202
32 Madera 160,940
33 Kings 153,298
34 Napa 134,869
35 Humboldt 134,541
36 Nevada 102,481
37 Sutter 98,857
38 Mendocino 90,244
39 Yuba 84,507
40 Lake 68,152
41 San Benito 67,290
42 Tehama 65,167
43 Tuolumne 54,498
44 Calaveras 46,248
45 Siskiyou 43,466
46 Amador 41,428
47 Lassen 30,356
48 Glenn 28,494
49 Del Norte 27,107
50 Colusa 21,984
51 Plumas 19,423
52 Inyo 18,739
53 Mariposa 17,082
54 Trinity 15,860
55 Mono 13,148
56 Modoc 8,600
57 Sierra 2,746
58 Alpine 1,616

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source
U.S. Census Bureau
Citation
U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage
ACS 5-year 2020-2024
License
Public domain (U.S. Census Bureau)
Unit
people
Available at
State · County · ZIP code
Territory roll-up
Summed across each territory
Last loaded
November 2026

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US Population nationwide