RANKING · 2020 CENSUS · 49 SHOWN OF 49

Largest Iranian population, California counties · 2020

California counties ranked by the number of residents who are Iranian 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 49 counties in California that qualify, ranked against each other statewide. The median across all 49 is 470.

Iranian Americans: full group profile →

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SAME RANKING BYCities States Metros

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

YEAR2010 2020 2024

RANKPLACESTATEPOPIRANIAN POPULATIONVS 2010

01Los Angeles County, CACA9,694,93485,595−7%

02Orange County, CACA3,149,50732,238+5%

03Santa Clara County, CACA1,914,39118,565+18%

04San Diego County, CACA3,282,24816,745+27%

05Contra Costa County, CACA1,170,0707,933+10%

06Alameda County, CACA1,636,6306,484+7%

07San Mateo County, CACA743,5685,233+10%

08Sacramento County, CACA1,618,4604,943+19%

09Riverside County, CACA2,544,9164,007+12%

10San Francisco County, CACA826,0793,609+59%

11Ventura County, CACA830,8512,985−24%

12San Bernardino County, CACA2,224,0912,459−32%

13Stanislaus County, CACA557,7192,108+58%

14Placer County, CACA442,0811,820+5%

15Marin County, CACA253,6941,690−25%

16Fresno County, CACA1,035,4561,505+8%

17Santa Barbara County, CACA442,0651,267+26%

18San Joaquin County, CACA823,815963−1%

19Yolo County, CACA224,410939+20%

20Santa Cruz County, CACA258,852900+83%

21Sonoma County, CACA486,444895−21%

22San Luis Obispo County, CACA282,367542+86%

23Kern County, CACA927,068481−34%

24El Dorado County, CACA192,323474−27%

25Solano County, CACA455,376470−44%

26Monterey County, CACA433,729344+15%

27Merced County, CACA297,260275−10%

28Shasta County, CACA181,648226+20%

29Napa County, CACA132,949211+105%

30Humboldt County, CACA131,647188+74%

31Sutter County, CACA98,787137+125%

32Imperial County, CACA181,411108–

33Yuba County, CACA88,69192–

34Butte County, CACA209,21191−59%

35Tulare County, CACA485,14672−62%

36San Benito County, CACA70,08268−30%

37Tuolumne County, CACA53,16058+76%

38Mendocino County, CACA88,12256−33%

39Kings County, CACA154,32753+20%

40Lake County, CACA67,772530%

41Madera County, CACA167,92742−9%

42Nevada County, CACA101,91122−69%

43Mono County, CACA12,50517−15%

44Siskiyou County, CACA42,01315−86%

45Del Norte County, CACA26,41014−85%

46Amador County, CACA41,87613−86%

47Lassen County, CACA28,11710−86%

48Inyo County, CACA18,1586–

49Trinity County, CACA15,7204−96%

SHOWING 1–49 OF 49

Download CSV (full list, 49 rows)

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