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 (2023 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.

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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 2000

01Orange County, CACA3,149,5071.0%–

02Santa Clara County, CACA1,914,3911.0%–

03Los Angeles County, CACA9,694,9340.9%–

04Contra Costa County, CACA1,170,0700.7%–

05San Mateo County, CACA743,5680.7%–

06Marin County, CACA253,6940.7%–

07San Diego County, CACA3,282,2480.5%–

08Placer County, CACA442,0810.5%–

09Yolo County, CACA224,4100.4%–

10San Francisco County, CACA826,0790.4%–

11Alameda County, CACA1,636,6300.4%–

12Stanislaus County, CACA557,7190.4%–

13Ventura County, CACA830,8510.4%–

14Santa Cruz County, CACA258,8520.3%–

15Sacramento County, CACA1,618,4600.3%–

16Santa Barbara County, CACA442,0650.3%–

17El Dorado County, CACA192,3230.2%–

18San Luis Obispo County, CACA282,3670.2%–

19Sonoma County, CACA486,4440.2%–

20Riverside County, CACA2,544,9160.2%–

21Napa County, CACA132,9490.2%–

22Fresno County, CACA1,035,4560.2%–

23Sutter County, CACA98,7870.1%–

24Humboldt County, CACA131,6470.1%–

25San Joaquin County, CACA823,8150.1%–

26Shasta County, CACA181,6480.1%–

27Yuba County, CACA88,6910.1%–

28Mono County, CACA12,5050.1%–

29San Bernardino County, CACA2,224,0910.1%–

30San Benito County, CACA70,0820.1%–

31Tuolumne County, CACA53,1600.1%–

32Solano County, CACA455,3760.1%–

33Merced County, CACA297,2600.1%–

34Lake County, CACA67,7720.1%–

35Monterey County, CACA433,7290.1%–

36Mendocino County, CACA88,1220.1%–

37Imperial County, CACA181,4110.1%–

38Kern County, CACA927,0680.1%–

39Del Norte County, CACA26,4100.1%–

40Butte County, CACA209,2110.0%–

41Kings County, CACA154,3270.0%–

42Siskiyou County, CACA42,0130.0%–

43Inyo County, CACA18,1580.0%–

44Amador County, CACA41,8760.0%–

45Lassen County, CACA28,1170.0%–

46Trinity County, CACA15,7200.0%–

47Madera County, CACA167,9270.0%–

48Nevada County, CACA101,9110.0%–

49Tulare County, CACA485,1460.0%–

SHOWING 1–49 OF 49

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