RANKING · 2010 CENSUS · 58 SHOWN OF 58

Largest foreign-born population, California counties · 2010

California counties with the most residents born outside the United States, as of the 2010 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. The median across all 58 is 31,025.

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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 –

01Los Angeles County, CACA9,694,9343,499,331–

02Orange County, CACA3,149,507916,651–

03San Diego County, CACA3,282,248715,320–

04Santa Clara County, CACA1,914,391659,057–

05Riverside County, CACA2,544,916489,864–

06Alameda County, CACA1,636,630465,389–

07San Bernardino County, CACA2,224,091439,087–

08San Francisco County, CACA826,079286,783–

09Sacramento County, CACA1,618,460278,410–

10Contra Costa County, CACA1,170,070247,629–

11San Mateo County, CACA743,568244,022–

12Fresno County, CACA1,035,456202,193–

13Ventura County, CACA830,851188,267–

14Kern County, CACA927,068172,260–

15San Joaquin County, CACA823,815159,706–

16Monterey County, CACA433,729125,085–

17Stanislaus County, CACA557,719104,793–

18Tulare County, CACA485,146102,226–

19Santa Barbara County, CACA442,065100,647–

20Solano County, CACA455,37682,286–

21Sonoma County, CACA486,44480,259–

22Merced County, CACA297,26063,465–

23Imperial County, CACA181,41155,680–

24Santa Cruz County, CACA258,85248,265–

25Marin County, CACA253,69447,563–

26Yolo County, CACA224,41041,063–

27Placer County, CACA442,08135,228–

28Kings County, CACA154,32732,918–

29Madera County, CACA167,92731,025–

30Napa County, CACA132,94930,707–

31San Luis Obispo County, CACA282,36726,962–

32Sutter County, CACA98,78721,112–

33Butte County, CACA209,21117,404–

34El Dorado County, CACA192,32314,235–

35San Benito County, CACA70,08211,751–

36Mendocino County, CACA88,12210,204–

37Yuba County, CACA88,6919,459–

38Shasta County, CACA181,6489,041–

39Humboldt County, CACA131,6477,257–

40Tehama County, CACA64,6656,852–

41Lake County, CACA67,7725,746–

42Nevada County, CACA101,9115,425–

43Colusa County, CACA21,8365,415–

44Glenn County, CACA28,1414,417–

45Mono County, CACA12,5052,619–

46Siskiyou County, CACA42,0132,617–

47Lassen County, CACA28,1172,503–

48Amador County, CACA41,8762,315–

49Tuolumne County, CACA53,1602,177–

50Del Norte County, CACA26,4102,076–

51Inyo County, CACA18,1581,897–

52Calaveras County, CACA46,6051,846–

53Plumas County, CACA18,5831,149–

54Mariposa County, CACA16,918683–

55Modoc County, CACA8,426639–

56Trinity County, CACA15,720428–

57Sierra County, CACA3,098170–

58Alpine County, CACA1,04359–

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS