RANKING · 2024 ACS · 47 SHOWN OF 47

Highest Iranian population share, California counties

California counties ranked by the share of all residents who are Iranian ancestry (2024 American Community Survey). A concentration measure: Iranian residents as a percentage of total population. This list covers the 47 counties in California that qualify, ranked against each other statewide.

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, CACA3,149,5071.3%+0.2 pts

02Santa Clara County, CACA1,914,3911.1%+0.2 pts

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

04Marin County, CACA253,6940.9%−0.0 pts

05Contra Costa County, CACA1,170,0700.8%+0.1 pts

06San Mateo County, CACA743,5680.7%+0.0 pts

07Ventura County, CACA830,8510.6%+0.1 pts

08San Diego County, CACA3,282,2480.5%+0.1 pts

09Alameda County, CACA1,636,6300.5%+0.1 pts

10San Francisco County, CACA826,0790.5%+0.2 pts

11Placer County, CACA442,0810.4%−0.1 pts

12Yolo County, CACA224,4100.4%−0.0 pts

13Sacramento County, CACA1,618,4600.4%+0.1 pts

14Santa Barbara County, CACA442,0650.3%+0.1 pts

15Santa Cruz County, CACA258,8520.3%+0.1 pts

16El Dorado County, CACA192,3230.3%−0.0 pts

17Lassen County, CACA28,1170.2%−0.0 pts

18Stanislaus County, CACA557,7190.2%−0.1 pts

19Riverside County, CACA2,544,9160.2%+0.0 pts

20Sonoma County, CACA486,4440.2%−0.1 pts

21Napa County, CACA132,9490.2%+0.1 pts

22San Joaquin County, CACA823,8150.2%+0.0 pts

23San Luis Obispo County, CACA282,3670.2%+0.1 pts

24Monterey County, CACA433,7290.1%+0.1 pts

25San Bernardino County, CACA2,224,0910.1%−0.1 pts

26Shasta County, CACA181,6480.1%+0.0 pts

27Solano County, CACA455,3760.1%−0.1 pts

28Fresno County, CACA1,035,4560.1%−0.0 pts

29Merced County, CACA297,2600.1%−0.0 pts

30Lake County, CACA67,7720.1%+0.0 pts

31Madera County, CACA167,9270.1%+0.1 pts

32Butte County, CACA209,2110.1%−0.0 pts

33Tulare County, CACA485,1460.1%+0.0 pts

34Humboldt County, CACA131,6470.1%−0.0 pts

35Mariposa County, CACA16,9180.1%+0.0 pts

36Nevada County, CACA101,9110.1%−0.0 pts

37Yuba County, CACA88,6910.1%–

38Del Norte County, CACA26,4100.1%−0.3 pts

39Kern County, CACA927,0680.0%−0.0 pts

40Sutter County, CACA98,7870.0%−0.0 pts

41Mendocino County, CACA88,1220.0%−0.1 pts

42Kings County, CACA154,3270.0%+0.0 pts

43Siskiyou County, CACA42,0130.0%−0.2 pts

44Plumas County, CACA18,5830.0%–

45Tuolumne County, CACA53,1600.0%−0.0 pts

46Calaveras County, CACA46,6050.0%–

47Imperial County, CACA181,4110.0%–

SHOWING 1–47 OF 47

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES