RANKING · 2020 CENSUS · 58 SHOWN OF 58

Highest American population share, California counties · 2020

California counties ranked by the share of all residents who are American ancestry (2023 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.

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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 2000

01Trinity County, CACA15,72010.0%–

02Tehama County, CACA64,6657.6%–

03Butte County, CACA209,2117.5%–

04Shasta County, CACA181,6486.8%–

05Ventura County, CACA830,8515.3%–

06Glenn County, CACA28,1414.7%–

07Orange County, CACA3,149,5074.5%–

08Siskiyou County, CACA42,0134.4%–

09Modoc County, CACA8,4264.1%–

10Inyo County, CACA18,1583.8%–

11Lake County, CACA67,7723.7%–

12El Dorado County, CACA192,3233.7%–

13Placer County, CACA442,0813.7%–

14Kern County, CACA927,0683.6%–

15San Luis Obispo County, CACA282,3673.6%–

16Plumas County, CACA18,5833.6%–

17Sutter County, CACA98,7873.5%–

18Mono County, CACA12,5053.5%–

19Humboldt County, CACA131,6473.2%–

20Los Angeles County, CACA9,694,9343.2%–

21Napa County, CACA132,9493.2%–

22Nevada County, CACA101,9113.2%–

23Yuba County, CACA88,6913.1%–

24Amador County, CACA41,8763.1%–

25Stanislaus County, CACA557,7193.1%–

26Mariposa County, CACA16,9183.1%–

27Lassen County, CACA28,1173.0%–

28Riverside County, CACA2,544,9162.9%–

29Tuolumne County, CACA53,1602.8%–

30Del Norte County, CACA26,4102.8%–

31San Diego County, CACA3,282,2482.7%–

32Santa Cruz County, CACA258,8522.7%–

33San Francisco County, CACA826,0792.6%–

34Contra Costa County, CACA1,170,0702.5%–

35Calaveras County, CACA46,6052.5%–

36Sonoma County, CACA486,4442.5%–

37Marin County, CACA253,6942.5%–

38San Mateo County, CACA743,5682.4%–

39San Bernardino County, CACA2,224,0912.3%–

40Santa Barbara County, CACA442,0652.3%–

41Sacramento County, CACA1,618,4602.3%–

42Madera County, CACA167,9272.2%–

43Solano County, CACA455,3762.2%–

44Alpine County, CACA1,0432.2%–

45Mendocino County, CACA88,1222.1%–

46Alameda County, CACA1,636,6302.1%–

47Yolo County, CACA224,4102.0%–

48Tulare County, CACA485,1462.0%–

49Santa Clara County, CACA1,914,3911.9%–

50Colusa County, CACA21,8361.9%–

51San Joaquin County, CACA823,8151.7%–

52San Benito County, CACA70,0821.7%–

53Merced County, CACA297,2601.6%–

54Kings County, CACA154,3271.6%–

55Monterey County, CACA433,7291.6%–

56Fresno County, CACA1,035,4561.5%–

57Imperial County, CACA181,4111.3%–

58Sierra County, CACA3,0980.2%–

SHOWING 1–58 OF 58

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES