RANKING · 2020 CENSUS · 58 SHOWN OF 58

Largest American population, California counties · 2020

California counties ranked by the number of residents who are American ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 4,868.

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SAME RANKING BYCities States Metros

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

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN POPULATIONVS 2010

01Los Angeles County, CACA9,694,934324,424+56%

02Orange County, CACA3,149,507142,885+69%

03San Diego County, CACA3,282,24890,849+19%

04Riverside County, CACA2,544,91671,763+34%

05San Bernardino County, CACA2,224,09150,701−4%

06Ventura County, CACA830,85144,598+33%

07Santa Clara County, CACA1,914,39137,509+49%

08Sacramento County, CACA1,618,46035,330+8%

09Alameda County, CACA1,636,63034,402+72%

10Kern County, CACA927,06832,291+45%

11Contra Costa County, CACA1,170,07029,248+21%

12San Francisco County, CACA826,07923,168+188%

13San Mateo County, CACA743,56818,004+61%

14Stanislaus County, CACA557,71916,781+1%

15Butte County, CACA209,21116,723+3%

16Fresno County, CACA1,035,45614,678−1%

17Placer County, CACA442,08114,328+13%

18San Joaquin County, CACA823,81512,464−17%

19Sonoma County, CACA486,44412,382−6%

20Shasta County, CACA181,64812,277−12%

21Santa Barbara County, CACA442,06510,335+1%

22San Luis Obispo County, CACA282,36710,106+3%

23Solano County, CACA455,3769,676+6%

24Tulare County, CACA485,1469,095−19%

25Santa Cruz County, CACA258,8527,252+16%

26El Dorado County, CACA192,3237,027−7%

27Monterey County, CACA433,7296,761+7%

28Marin County, CACA253,6946,359+20%

29Tehama County, CACA64,6654,868+22%

30Napa County, CACA132,9494,463+23%

31Merced County, CACA297,2604,419−25%

32Humboldt County, CACA131,6474,410−4%

33Yolo County, CACA224,4104,409+8%

34Madera County, CACA167,9273,435+24%

35Sutter County, CACA98,7873,418−38%

36Nevada County, CACA101,9113,151−24%

37Lake County, CACA67,7722,407+9%

38Yuba County, CACA88,6912,396−58%

39Kings County, CACA154,3272,370−45%

40Imperial County, CACA181,4112,309+11%

41Siskiyou County, CACA42,0131,935+11%

42Mendocino County, CACA88,1221,853−39%

43Tuolumne County, CACA53,1601,520−36%

44Glenn County, CACA28,1411,316−2%

45Trinity County, CACA15,7201,251+255%

46Amador County, CACA41,8761,205−21%

47Calaveras County, CACA46,6051,153−50%

48San Benito County, CACA70,0821,016−18%

49Lassen County, CACA28,117908−31%

50Del Norte County, CACA26,410764−52%

51Inyo County, CACA18,158687−6%

52Plumas County, CACA18,583674−3%

53Mariposa County, CACA16,918532−11%

54Mono County, CACA12,505503+63%

55Colusa County, CACA21,836402−61%

56Modoc County, CACA8,426360+42%

57Alpine County, CACA1,04325+67%

58Sierra County, CACA3,0985−96%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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