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%+2.7 pts

02San Mateo County, CACA743,56835.0%+1.0 pts

03San Francisco County, CACA826,07934.2%−1.4 pts

04Los Angeles County, CACA9,694,93433.7%−1.9 pts

05Alameda County, CACA1,636,63032.8%+1.9 pts

06Imperial County, CACA181,41130.1%−1.8 pts

07Orange County, CACA3,149,50729.6%−0.8 pts

08Monterey County, CACA433,72929.0%−1.2 pts

09Colusa County, CACA21,83627.8%+2.5 pts

10Merced County, CACA297,26026.4%+1.6 pts

11Contra Costa County, CACA1,170,07024.8%+1.2 pts

12San Joaquin County, CACA823,81523.0%−0.3 pts

13San Diego County, CACA3,282,24822.9%−0.2 pts

14Santa Barbara County, CACA442,06522.7%−1.1 pts

15Yolo County, CACA224,41022.5%+2.1 pts

16Sutter County, CACA98,78721.7%−0.5 pts

17Tulare County, CACA485,14621.5%−1.6 pts

18Riverside County, CACA2,544,91621.5%−0.9 pts

19Ventura County, CACA830,85121.3%−1.6 pts

20Napa County, CACA132,94921.2%−1.3 pts

21Sacramento County, CACA1,618,46020.9%+1.3 pts

22San Bernardino County, CACA2,224,09120.7%−0.9 pts

23Madera County, CACA167,92720.4%−0.1 pts

24Fresno County, CACA1,035,45620.4%−1.4 pts

25Stanislaus County, CACA557,71920.2%−0.2 pts

26Kern County, CACA927,06819.8%−0.7 pts

27Solano County, CACA455,37619.7%−0.2 pts

28Kings County, CACA154,32719.5%−2.1 pts

29San Benito County, CACA70,08218.7%−2.6 pts

30Marin County, CACA253,69418.3%−0.6 pts

31Glenn County, CACA28,14117.8%+2.1 pts

32Santa Cruz County, CACA258,85217.5%−0.9 pts

33Sonoma County, CACA486,44416.6%+0.0 pts

34Mono County, CACA12,50515.9%−2.5 pts

35Mendocino County, CACA88,12212.3%+0.6 pts

36Yuba County, CACA88,69112.1%−1.0 pts

37Placer County, CACA442,08111.3%+1.2 pts

38San Luis Obispo County, CACA282,3679.5%−0.5 pts

39El Dorado County, CACA192,3239.3%+1.4 pts

40Tehama County, CACA64,6658.7%−2.0 pts

41Lake County, CACA67,7728.2%−0.7 pts

42Del Norte County, CACA26,4108.0%+0.8 pts

43Modoc County, CACA8,4267.6%+1.0 pts

44Butte County, CACA209,2117.5%−0.4 pts

45Inyo County, CACA18,1587.3%−2.9 pts

46Alpine County, CACA1,0436.3%+1.3 pts

47Siskiyou County, CACA42,0135.9%+0.1 pts

48Amador County, CACA41,8765.9%−0.2 pts

49Nevada County, CACA101,9115.8%+0.3 pts

50Shasta County, CACA181,6485.7%+0.6 pts

51Mariposa County, CACA16,9185.6%+1.9 pts

52Humboldt County, CACA131,6475.4%+0.0 pts

53Lassen County, CACA28,1175.3%−1.8 pts

54Tuolumne County, CACA53,1604.7%+0.8 pts

55Calaveras County, CACA46,6054.3%+0.3 pts

56Plumas County, CACA18,5834.0%−1.8 pts

57Trinity County, CACA15,7203.1%+0.0 pts

58Sierra County, CACA3,0981.9%−3.3 pts

SHOWING 1–58 OF 58

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS