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%+4.5 pts

02San Mateo County, CACA743,56835.7%+1.8 pts

03Alameda County, CACA1,636,63034.7%+3.9 pts

04San Francisco County, CACA826,07934.0%−1.6 pts

05Los Angeles County, CACA9,694,93433.4%−2.2 pts

06Imperial County, CACA181,41131.6%−0.3 pts

07Orange County, CACA3,149,50730.4%−0.1 pts

08Monterey County, CACA433,72929.6%−0.6 pts

09Colusa County, CACA21,83627.5%+2.3 pts

10Contra Costa County, CACA1,170,07026.6%+3.0 pts

11Merced County, CACA297,26025.6%+0.8 pts

12San Joaquin County, CACA823,81525.2%+1.9 pts

13San Diego County, CACA3,282,24822.8%−0.3 pts

14Sutter County, CACA98,78722.7%+0.5 pts

15Sacramento County, CACA1,618,46022.3%+2.6 pts

16Ventura County, CACA830,85122.2%−0.6 pts

17Tulare County, CACA485,14622.2%−0.9 pts

18Napa County, CACA132,94922.2%−0.3 pts

19Santa Barbara County, CACA442,06522.2%−1.6 pts

20Riverside County, CACA2,544,91621.9%−0.4 pts

21San Bernardino County, CACA2,224,09121.6%+0.0 pts

22Stanislaus County, CACA557,71921.0%+0.6 pts

23Yolo County, CACA224,41021.0%+0.5 pts

24Solano County, CACA455,37620.8%+0.9 pts

25Kern County, CACA927,06820.2%−0.3 pts

26Madera County, CACA167,92720.1%−0.4 pts

27San Benito County, CACA70,08220.0%−1.2 pts

28Fresno County, CACA1,035,45620.0%−1.7 pts

29Marin County, CACA253,69419.6%+0.8 pts

30Kings County, CACA154,32719.2%−2.3 pts

31Glenn County, CACA28,14118.6%+2.9 pts

32Santa Cruz County, CACA258,85218.0%−0.4 pts

33Sonoma County, CACA486,44416.8%+0.3 pts

34Mono County, CACA12,50514.1%−4.3 pts

35Placer County, CACA442,08112.7%+2.6 pts

36Mendocino County, CACA88,12212.2%+0.6 pts

37Yuba County, CACA88,69111.5%−1.6 pts

38Tehama County, CACA64,66511.1%+0.3 pts

39Lake County, CACA67,7729.9%+1.0 pts

40San Luis Obispo County, CACA282,3679.9%−0.1 pts

41El Dorado County, CACA192,3239.2%+1.4 pts

42Modoc County, CACA8,4268.8%+2.2 pts

43Butte County, CACA209,2118.6%+0.6 pts

44Mariposa County, CACA16,9188.2%+4.5 pts

45Inyo County, CACA18,1587.9%−2.3 pts

46Lassen County, CACA28,1177.0%−0.2 pts

47Del Norte County, CACA26,4106.8%−0.4 pts

48Nevada County, CACA101,9116.4%+0.9 pts

49Humboldt County, CACA131,6476.2%+0.8 pts

50Calaveras County, CACA46,6056.1%+2.1 pts

51Siskiyou County, CACA42,0135.8%+0.0 pts

52Amador County, CACA41,8765.8%−0.2 pts

53Alpine County, CACA1,0435.4%+0.4 pts

54Shasta County, CACA181,6485.0%−0.1 pts

55Plumas County, CACA18,5834.8%−0.9 pts

56Trinity County, CACA15,7204.8%+1.7 pts

57Tuolumne County, CACA53,1604.6%+0.7 pts

58Sierra County, CACA3,0983.8%−1.5 pts

SHOWING 1–58 OF 58

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES