RANKING · 2024 ACS · 58 SHOWN OF 58

Highest American population share, California counties

California counties ranked by the share of all residents who are American ancestry (2024 American Community Survey). A concentration measure: American residents as a percentage of total population. This list covers the 58 counties in California that qualify, ranked against each other statewide.

American ancestry: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share Largest Iraqi population

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2010

01Trinity County, CACA15,72020.7%+706%

02Tehama County, CACA64,6659.3%+46%

03Glenn County, CACA28,1417.4%+53%

04Shasta County, CACA181,6486.5%−17%

05Modoc County, CACA8,4266.3%+141%

06Alpine County, CACA1,0436.1%+380%

07Del Norte County, CACA26,4105.3%−4%

08Butte County, CACA209,2115.0%−32%

09Inyo County, CACA18,1584.9%+22%

10Colusa County, CACA21,8364.5%−7%

11Orange County, CACA3,149,5074.5%+59%

12Sierra County, CACA3,0984.5%+24%

13Lake County, CACA67,7724.1%+18%

14Mono County, CACA12,5053.8%+70%

15Amador County, CACA41,8763.5%−12%

16Kern County, CACA927,0683.5%+27%

17Nevada County, CACA101,9113.3%−22%

18Ventura County, CACA830,8513.3%−21%

19Los Angeles County, CACA9,694,9343.1%+48%

20El Dorado County, CACA192,3233.1%−25%

21Placer County, CACA442,0813.1%−17%

22Yuba County, CACA88,6913.1%−61%

23Siskiyou County, CACA42,0133.1%−22%

24San Mateo County, CACA743,5682.8%+79%

25Lassen County, CACA28,1172.8%−26%

26Plumas County, CACA18,5832.7%−21%

27Riverside County, CACA2,544,9162.7%+5%

28San Bernardino County, CACA2,224,0912.6%−2%

29Calaveras County, CACA46,6052.6%−49%

30Sonoma County, CACA486,4442.5%−10%

31Mariposa County, CACA16,9182.5%−23%

32San Diego County, CACA3,282,2482.5%−1%

33Sacramento County, CACA1,618,4602.4%+2%

34Solano County, CACA455,3762.4%+7%

35Napa County, CACA132,9492.4%−13%

36Humboldt County, CACA131,6472.3%−34%

37Santa Barbara County, CACA442,0652.3%−7%

38Marin County, CACA253,6942.3%+6%

39San Luis Obispo County, CACA282,3672.2%−39%

40Yolo County, CACA224,4102.2%+8%

41Sutter County, CACA98,7872.2%−62%

42Contra Costa County, CACA1,170,0702.2%−8%

43Stanislaus County, CACA557,7192.1%−34%

44Tuolumne County, CACA53,1602.1%−51%

45Kings County, CACA154,3272.0%−29%

46San Francisco County, CACA826,0792.0%+99%

47San Benito County, CACA70,0822.0%−14%

48Santa Cruz County, CACA258,8521.9%−24%

49Tulare County, CACA485,1461.8%−30%

50Alameda County, CACA1,636,6301.8%+35%

51San Joaquin County, CACA823,8151.8%−21%

52Merced County, CACA297,2601.7%−27%

53Madera County, CACA167,9271.7%−11%

54Santa Clara County, CACA1,914,3911.7%+15%

55Fresno County, CACA1,035,4561.6%+0%

56Monterey County, CACA433,7291.5%−1%

57Imperial County, CACA181,4111.5%+18%

58Mendocino County, CACA88,1221.4%−61%

SHOWING 1–58 OF 58

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