RANKING · 2020 CENSUS · 58 SHOWN OF 58

Most foreign-born residents, California counties · 2020

California counties ranked by the share of residents born outside the US (2020 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide.

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR2010 2020 2024

RANKPLACESTATEPOPFOREIGN-BORNVS 2010

01Santa Clara County, CACA1,914,39139.7%+7%

02San Mateo County, CACA743,56835.0%+3%

03San Francisco County, CACA826,07934.2%−4%

04Los Angeles County, CACA9,694,93433.7%−5%

05Alameda County, CACA1,636,63032.8%+6%

06Imperial County, CACA181,41130.1%−6%

07Orange County, CACA3,149,50729.6%−3%

08Monterey County, CACA433,72929.0%−4%

09Colusa County, CACA21,83627.8%+10%

10Merced County, CACA297,26026.4%+6%

11Contra Costa County, CACA1,170,07024.8%+5%

12San Joaquin County, CACA823,81523.0%−1%

13San Diego County, CACA3,282,24822.9%−1%

14Santa Barbara County, CACA442,06522.7%−4%

15Yolo County, CACA224,41022.5%+10%

16Sutter County, CACA98,78721.7%−2%

17Tulare County, CACA485,14621.5%−7%

18Riverside County, CACA2,544,91621.5%−4%

19Ventura County, CACA830,85121.3%−7%

20Napa County, CACA132,94921.2%−6%

21Sacramento County, CACA1,618,46020.9%+7%

22San Bernardino County, CACA2,224,09120.7%−4%

23Madera County, CACA167,92720.4%−1%

24Fresno County, CACA1,035,45620.4%−6%

25Stanislaus County, CACA557,71920.2%−1%

26Kern County, CACA927,06819.8%−4%

27Solano County, CACA455,37619.7%−1%

28Kings County, CACA154,32719.5%−10%

29San Benito County, CACA70,08218.7%−12%

30Marin County, CACA253,69418.3%−3%

31Glenn County, CACA28,14117.8%+13%

32Santa Cruz County, CACA258,85217.5%−5%

33Sonoma County, CACA486,44416.6%+0%

34Mono County, CACA12,50515.9%−14%

35Mendocino County, CACA88,12212.3%+5%

36Yuba County, CACA88,69112.1%−8%

37Placer County, CACA442,08111.3%+12%

38San Luis Obispo County, CACA282,3679.5%−5%

39El Dorado County, CACA192,3239.3%+18%

40Tehama County, CACA64,6658.7%−19%

41Lake County, CACA67,7728.2%−8%

42Del Norte County, CACA26,4108.0%+11%

43Modoc County, CACA8,4267.6%+15%

44Butte County, CACA209,2117.5%−5%

45Inyo County, CACA18,1587.3%−28%

46Alpine County, CACA1,0436.3%+26%

47Siskiyou County, CACA42,0135.9%+1%

48Amador County, CACA41,8765.9%−3%

49Nevada County, CACA101,9115.8%+5%

50Shasta County, CACA181,6485.7%+12%

51Mariposa County, CACA16,9185.6%+50%

52Humboldt County, CACA131,6475.4%+1%

53Lassen County, CACA28,1175.3%−26%

54Tuolumne County, CACA53,1604.7%+20%

55Calaveras County, CACA46,6054.3%+7%

56Plumas County, CACA18,5834.0%−31%

57Trinity County, CACA15,7203.1%+0%

58Sierra County, CACA3,0981.9%−63%

SHOWING 1–58 OF 58

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