RANKING · 2024 ACS · 58 SHOWN OF 58

Most foreign-born residents, California counties

California counties ranked by the share of residents born outside the US (2024 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, CACA1,914,39141.5%+12%

02San Mateo County, CACA743,56835.7%+5%

03Alameda County, CACA1,636,63034.7%+13%

04San Francisco County, CACA826,07934.0%−4%

05Los Angeles County, CACA9,694,93433.4%−6%

06Imperial County, CACA181,41131.6%−1%

07Orange County, CACA3,149,50730.4%−0%

08Monterey County, CACA433,72929.6%−2%

09Colusa County, CACA21,83627.5%+9%

10Contra Costa County, CACA1,170,07026.6%+13%

11Merced County, CACA297,26025.6%+3%

12San Joaquin County, CACA823,81525.2%+8%

13San Diego County, CACA3,282,24822.8%−1%

14Sutter County, CACA98,78722.7%+2%

15Sacramento County, CACA1,618,46022.3%+13%

16Ventura County, CACA830,85122.2%−3%

17Tulare County, CACA485,14622.2%−4%

18Napa County, CACA132,94922.2%−1%

19Santa Barbara County, CACA442,06522.2%−7%

20Riverside County, CACA2,544,91621.9%−2%

21San Bernardino County, CACA2,224,09121.6%+0%

22Stanislaus County, CACA557,71921.0%+3%

23Yolo County, CACA224,41021.0%+3%

24Solano County, CACA455,37620.8%+4%

25Kern County, CACA927,06820.2%−1%

26Madera County, CACA167,92720.1%−2%

27San Benito County, CACA70,08220.0%−6%

28Fresno County, CACA1,035,45620.0%−8%

29Marin County, CACA253,69419.6%+4%

30Kings County, CACA154,32719.2%−11%

31Glenn County, CACA28,14118.6%+18%

32Santa Cruz County, CACA258,85218.0%−2%

33Sonoma County, CACA486,44416.8%+2%

34Mono County, CACA12,50514.1%−23%

35Placer County, CACA442,08112.7%+25%

36Mendocino County, CACA88,12212.2%+5%

37Yuba County, CACA88,69111.5%−12%

38Tehama County, CACA64,66511.1%+3%

39Lake County, CACA67,7729.9%+11%

40San Luis Obispo County, CACA282,3679.9%−1%

41El Dorado County, CACA192,3239.2%+17%

42Modoc County, CACA8,4268.8%+33%

43Butte County, CACA209,2118.6%+8%

44Mariposa County, CACA16,9188.2%+121%

45Inyo County, CACA18,1587.9%−23%

46Lassen County, CACA28,1177.0%−2%

47Del Norte County, CACA26,4106.8%−6%

48Nevada County, CACA101,9116.4%+16%

49Humboldt County, CACA131,6476.2%+14%

50Calaveras County, CACA46,6056.1%+52%

51Siskiyou County, CACA42,0135.8%+0%

52Amador County, CACA41,8765.8%−4%

53Alpine County, CACA1,0435.4%+7%

54Shasta County, CACA181,6485.0%−1%

55Plumas County, CACA18,5834.8%−16%

56Trinity County, CACA15,7204.8%+55%

57Tuolumne County, CACA53,1604.6%+17%

58Sierra County, CACA3,0983.8%−29%

SHOWING 1–58 OF 58

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES