RANKING · 2020 CENSUS · 49 SHOWN OF 49

Highest Iranian population share, California counties · 2020

California counties ranked by the share of all residents who are Iranian ancestry (2020 American Community Survey). A concentration measure: Iranian residents as a percentage of total population. This list covers the 49 counties in California that qualify, ranked against each other statewide. The median across all 49 is 0.1%.

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

Highest Iranian population share by state

RANKPLACESTATEPOPIRANIAN SHAREVS 2010

01Orange County, CACA3,149,5071.0%0.0 pts

02Santa Clara County, CACA1,914,3911.0%+0.1 pts

03Los Angeles County, CACA9,694,9340.9%−0.1 pts

04Contra Costa County, CACA1,170,0700.7%0.0 pts

05San Mateo County, CACA743,5680.7%0.0 pts

06Marin County, CACA253,6940.7%−0.3 pts

07San Diego County, CACA3,282,2480.5%+0.1 pts

08Placer County, CACA442,0810.5%−0.1 pts

09Yolo County, CACA224,4100.4%0.0 pts

10San Francisco County, CACA826,0790.4%+0.1 pts

11Alameda County, CACA1,636,6300.4%0.0 pts

12Stanislaus County, CACA557,7190.4%+0.1 pts

13Ventura County, CACA830,8510.4%−0.1 pts

14Santa Cruz County, CACA258,8520.3%+0.1 pts

15Sacramento County, CACA1,618,4600.3%0.0 pts

16Santa Barbara County, CACA442,0650.3%0.0 pts

17El Dorado County, CACA192,3230.2%−0.1 pts

18San Luis Obispo County, CACA282,3670.2%+0.1 pts

19Sonoma County, CACA486,4440.2%−0.1 pts

20Riverside County, CACA2,544,9160.2%0.0 pts

21Napa County, CACA132,9490.2%+0.1 pts

22Fresno County, CACA1,035,4560.2%0.0 pts

23Sutter County, CACA98,7870.1%+0.1 pts

24Humboldt County, CACA131,6470.1%+0.1 pts

25San Joaquin County, CACA823,8150.1%0.0 pts

26Shasta County, CACA181,6480.1%0.0 pts

27Yuba County, CACA88,6910.1%–

28Mono County, CACA12,5050.1%0.0 pts

29San Bernardino County, CACA2,224,0910.1%−0.1 pts

30San Benito County, CACA70,0820.1%−0.1 pts

31Tuolumne County, CACA53,1600.1%0.0 pts

32Solano County, CACA455,3760.1%−0.1 pts

33Merced County, CACA297,2600.1%0.0 pts

34Lake County, CACA67,7720.1%0.0 pts

35Monterey County, CACA433,7290.1%0.0 pts

36Mendocino County, CACA88,1220.1%0.0 pts

37Imperial County, CACA181,4110.1%–

38Kern County, CACA927,0680.1%0.0 pts

39Del Norte County, CACA26,4100.1%−0.3 pts

40Butte County, CACA209,2110.0%−0.1 pts

41Kings County, CACA154,3270.0%0.0 pts

42Siskiyou County, CACA42,0130.0%−0.2 pts

43Inyo County, CACA18,1580.0%–

44Amador County, CACA41,8760.0%−0.2 pts

45Lassen County, CACA28,1170.0%−0.2 pts

46Trinity County, CACA15,7200.0%−0.7 pts

47Madera County, CACA167,9270.0%0.0 pts

48Nevada County, CACA101,9110.0%−0.1 pts

49Tulare County, CACA485,1460.0%0.0 pts

SHOWING 1–49 OF 49

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