RANKING · 2010 CENSUS · 58 SHOWN OF 58

Most foreign-born residents, California counties · 2010

California counties ranked by the share of residents born outside the US (2010 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 –

01Santa Clara County, CACA1,914,39137.0%–

02Los Angeles County, CACA9,694,93435.6%–

03San Francisco County, CACA826,07935.6%–

04San Mateo County, CACA743,56834.0%–

05Imperial County, CACA181,41131.9%–

06Alameda County, CACA1,636,63030.8%–

07Orange County, CACA3,149,50730.5%–

08Monterey County, CACA433,72930.1%–

09Colusa County, CACA21,83625.3%–

10Merced County, CACA297,26024.8%–

11Santa Barbara County, CACA442,06523.7%–

12Contra Costa County, CACA1,170,07023.6%–

13San Joaquin County, CACA823,81523.3%–

14Tulare County, CACA485,14623.1%–

15San Diego County, CACA3,282,24823.1%–

16Ventura County, CACA830,85122.9%–

17Napa County, CACA132,94922.5%–

18Riverside County, CACA2,544,91622.4%–

19Sutter County, CACA98,78722.3%–

20Fresno County, CACA1,035,45621.7%–

21San Bernardino County, CACA2,224,09121.6%–

22Kings County, CACA154,32721.5%–

23San Benito County, CACA70,08221.3%–

24Madera County, CACA167,92720.6%–

25Kern County, CACA927,06820.5%–

26Yolo County, CACA224,41020.4%–

27Stanislaus County, CACA557,71920.4%–

28Solano County, CACA455,37619.9%–

29Sacramento County, CACA1,618,46019.6%–

30Marin County, CACA253,69418.8%–

31Mono County, CACA12,50518.4%–

32Santa Cruz County, CACA258,85218.4%–

33Sonoma County, CACA486,44416.6%–

34Glenn County, CACA28,14115.7%–

35Yuba County, CACA88,69113.1%–

36Mendocino County, CACA88,12211.6%–

37Tehama County, CACA64,66510.8%–

38Inyo County, CACA18,15810.2%–

39Placer County, CACA442,08110.1%–

40San Luis Obispo County, CACA282,36710.0%–

41Lake County, CACA67,7728.9%–

42Butte County, CACA209,2117.9%–

43El Dorado County, CACA192,3237.9%–

44Del Norte County, CACA26,4107.3%–

45Lassen County, CACA28,1177.2%–

46Modoc County, CACA8,4266.6%–

47Amador County, CACA41,8766.1%–

48Siskiyou County, CACA42,0135.8%–

49Plumas County, CACA18,5835.7%–

50Nevada County, CACA101,9115.5%–

51Humboldt County, CACA131,6475.4%–

52Sierra County, CACA3,0985.3%–

53Shasta County, CACA181,6485.1%–

54Alpine County, CACA1,0435.0%–

55Calaveras County, CACA46,6054.1%–

56Tuolumne County, CACA53,1603.9%–

57Mariposa County, CACA16,9183.7%–

58Trinity County, CACA15,7203.1%–

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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