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 (2020 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

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2010

01Trinity County, CACA15,72010.0%+7.4 pts

02Tehama County, CACA64,6657.6%+1.2 pts

03Butte County, CACA209,2117.5%+0.1 pts

04Shasta County, CACA181,6486.8%−1.0 pts

05Ventura County, CACA830,8515.3%+1.1 pts

06Glenn County, CACA28,1414.7%−0.1 pts

07Orange County, CACA3,149,5074.5%+1.7 pts

08Siskiyou County, CACA42,0134.4%+0.5 pts

09Modoc County, CACA8,4264.1%+1.4 pts

10Inyo County, CACA18,1583.8%−0.1 pts

11Lake County, CACA67,7723.7%+0.3 pts

12El Dorado County, CACA192,3233.7%−0.5 pts

13Placer County, CACA442,0813.7%−0.1 pts

14Kern County, CACA927,0683.6%+0.9 pts

15San Luis Obispo County, CACA282,3673.6%−0.1 pts

16Plumas County, CACA18,5833.6%+0.2 pts

17Sutter County, CACA98,7873.5%−2.4 pts

18Mono County, CACA12,5053.5%+1.3 pts

19Humboldt County, CACA131,6473.2%−0.2 pts

20Los Angeles County, CACA9,694,9343.2%+1.1 pts

21Napa County, CACA132,9493.2%+0.5 pts

22Nevada County, CACA101,9113.2%−1.0 pts

23Yuba County, CACA88,6913.1%−4.9 pts

24Amador County, CACA41,8763.1%−0.9 pts

25Stanislaus County, CACA557,7193.1%−0.2 pts

26Mariposa County, CACA16,9183.1%−0.2 pts

27Lassen County, CACA28,1173.0%−0.8 pts

28Riverside County, CACA2,544,9162.9%+0.4 pts

29Tuolumne County, CACA53,1602.8%−1.4 pts

30Del Norte County, CACA26,4102.8%−2.8 pts

31San Diego County, CACA3,282,2482.7%+0.2 pts

32Santa Cruz County, CACA258,8522.7%+0.2 pts

33San Francisco County, CACA826,0792.6%+1.6 pts

34Contra Costa County, CACA1,170,0702.5%+0.2 pts

35Calaveras County, CACA46,6052.5%−2.5 pts

36Sonoma County, CACA486,4442.5%−0.3 pts

37Marin County, CACA253,6942.5%+0.3 pts

38San Mateo County, CACA743,5682.4%+0.8 pts

39San Bernardino County, CACA2,224,0912.3%−0.3 pts

40Santa Barbara County, CACA442,0652.3%−0.1 pts

41Sacramento County, CACA1,618,4602.3%−0.0 pts

42Madera County, CACA167,9272.2%+0.3 pts

43Solano County, CACA455,3762.2%−0.1 pts

44Alpine County, CACA1,0432.2%+0.9 pts

45Mendocino County, CACA88,1222.1%−1.4 pts

46Alameda County, CACA1,636,6302.1%+0.7 pts

47Yolo County, CACA224,4102.0%−0.1 pts

48Tulare County, CACA485,1462.0%−0.7 pts

49Santa Clara County, CACA1,914,3911.9%+0.5 pts

50Colusa County, CACA21,8361.9%−3.0 pts

51San Joaquin County, CACA823,8151.7%−0.6 pts

52San Benito County, CACA70,0821.7%−0.6 pts

53Merced County, CACA297,2601.6%−0.7 pts

54Kings County, CACA154,3271.6%−1.3 pts

55Monterey County, CACA433,7291.6%+0.0 pts

56Fresno County, CACA1,035,4561.5%−0.2 pts

57Imperial County, CACA181,4111.3%+0.0 pts

58Sierra County, CACA3,0980.2%−3.5 pts

SHOWING 1–58 OF 58

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