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. The median across all 47 is 0.1%. Biggest climber in the top 100 since 2020: Lassen County, CA, up 28 places to #17.

Iranian Americans: full group profile →

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SAME RANKING BYCities States Metros

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

04▲2Marin County, CACA253,6940.9%0.0 pts

05▼1Contra Costa County, CACA1,170,0700.8%+0.1 pts

06▼1San Mateo County, CACA743,5680.7%0.0 pts

07▲6Ventura County, CACA830,8510.6%+0.1 pts

08▼1San Diego County, CACA3,282,2480.5%+0.1 pts

09▲2Alameda County, CACA1,636,6300.5%+0.1 pts

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

11▼3Placer County, CACA442,0810.4%−0.1 pts

12▼3Yolo County, CACA224,4100.4%0.0 pts

13▲2Sacramento County, CACA1,618,4600.4%+0.1 pts

14▲2Santa Barbara County, CACA442,0650.3%+0.1 pts

15▼1Santa Cruz County, CACA258,8520.3%+0.1 pts

16▲1El Dorado County, CACA192,3230.3%0.0 pts

17▲28Lassen County, CACA28,1170.2%0.0 pts

18▼6Stanislaus County, CACA557,7190.2%−0.1 pts

19▲1Riverside County, CACA2,544,9160.2%0.0 pts

20▼1Sonoma County, CACA486,4440.2%−0.1 pts

21Napa County, CACA132,9490.2%+0.1 pts

22▲3San Joaquin County, CACA823,8150.2%0.0 pts

23▼5San Luis Obispo County, CACA282,3670.2%+0.1 pts

24▲11Monterey County, CACA433,7290.1%+0.1 pts

25▲4San Bernardino County, CACA2,224,0910.1%−0.1 pts

26Shasta County, CACA181,6480.1%0.0 pts

27▲5Solano County, CACA455,3760.1%−0.1 pts

28▼6Fresno County, CACA1,035,4560.1%0.0 pts

29▲4Merced County, CACA297,2600.1%0.0 pts

30▲4Lake County, CACA67,7720.1%0.0 pts

31▲16Madera County, CACA167,9270.1%+0.1 pts

32▲8Butte County, CACA209,2110.1%0.0 pts

33▲16Tulare County, CACA485,1460.1%0.0 pts

34▼10Humboldt County, CACA131,6470.1%0.0 pts

35Mariposa County, CACA16,9180.1%0.0 pts

36▲12Nevada County, CACA101,9110.1%0.0 pts

37▼10Yuba County, CACA88,6910.1%–

38▲1Del Norte County, CACA26,4100.1%−0.3 pts

39▼1Kern County, CACA927,0680.0%0.0 pts

40▼17Sutter County, CACA98,7870.0%0.0 pts

41▼5Mendocino County, CACA88,1220.0%−0.1 pts

42▼1Kings County, CACA154,3270.0%0.0 pts

43▼1Siskiyou County, CACA42,0130.0%−0.2 pts

44Plumas County, CACA18,5830.0%–

45▼14Tuolumne County, CACA53,1600.0%0.0 pts

46Calaveras County, CACA46,6050.0%–

47▼10Imperial County, CACA181,4110.0%–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES