RANKING · 2020 CENSUS · 58 SHOWN OF 58

Largest foreign-born population, California counties · 2020

California counties with the most residents born outside the United States, as of the 2020 American Community Survey. Ranked by number of people, not share. This list covers the 58 counties in California that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDMost residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people Most unmarried men

YEAR2010 2020 2024

RANKPLACESTATEPOPFOREIGN-BORN POPULATIONVS 2010

01Los Angeles County, CACA9,694,9343,377,634−3%

02Orange County, CACA3,149,507943,959+3%

03Santa Clara County, CACA1,914,391769,174+17%

04San Diego County, CACA3,282,248756,450+6%

05Alameda County, CACA1,636,630551,077+18%

06Riverside County, CACA2,544,916519,127+6%

07San Bernardino County, CACA2,224,091451,078+3%

08Sacramento County, CACA1,618,460331,477+19%

09San Francisco County, CACA826,079299,230+4%

10Contra Costa County, CACA1,170,070289,626+17%

11San Mateo County, CACA743,568267,209+10%

12Fresno County, CACA1,035,456205,565+2%

13Kern County, CACA927,068179,780+4%

14Ventura County, CACA830,851179,566−5%

15San Joaquin County, CACA823,815179,337+12%

16Monterey County, CACA433,729127,186+2%

17Stanislaus County, CACA557,719111,788+7%

18Tulare County, CACA485,146101,695−1%

19Santa Barbara County, CACA442,065101,664+1%

20Solano County, CACA455,37689,507+9%

21Sonoma County, CACA486,44481,105+1%

22Merced County, CACA297,26074,258+17%

23Imperial County, CACA181,41154,102−3%

24Yolo County, CACA224,41048,719+19%

25Marin County, CACA253,69447,907+1%

26Santa Cruz County, CACA258,85247,494−2%

27Placer County, CACA442,08145,725+30%

28Madera County, CACA167,92731,930+3%

29Kings County, CACA154,32729,682−10%

30Napa County, CACA132,94929,265−5%

31San Luis Obispo County, CACA282,36726,927−0%

32Sutter County, CACA98,78721,667+3%

33El Dorado County, CACA192,32317,773+25%

34Butte County, CACA209,21115,917−9%

35San Benito County, CACA70,08211,986+2%

36Mendocino County, CACA88,12211,225+10%

37Shasta County, CACA181,64810,436+15%

38Yuba County, CACA88,6919,846+4%

39Humboldt County, CACA131,6477,396+2%

40Colusa County, CACA21,8366,066+12%

41Nevada County, CACA101,9115,881+8%

42Tehama County, CACA64,6655,759−16%

43Lake County, CACA67,7725,574−3%

44Glenn County, CACA28,1415,135+16%

45Tuolumne County, CACA53,1602,635+21%

46Siskiyou County, CACA42,0132,605−0%

47Amador County, CACA41,8762,376+3%

48Del Norte County, CACA26,4102,232+8%

49Mono County, CACA12,5052,104−20%

50Calaveras County, CACA46,6051,960+6%

51Lassen County, CACA28,1171,746−30%

52Inyo County, CACA18,1581,395−26%

53Mariposa County, CACA16,918958+40%

54Plumas County, CACA18,583783−32%

55Modoc County, CACA8,426660+3%

56Trinity County, CACA15,720501+17%

57Alpine County, CACA1,04376+29%

58Sierra County, CACA3,09863−63%

SHOWING 1–58 OF 58

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS