RANKING · 2010 CENSUS · 48 SHOWN OF 48

Highest Iranian population share, California counties · 2010

California counties ranked by the share of all residents who are Iranian ancestry (2010 American Community Survey). A concentration measure: Iranian residents as a percentage of total population. This list covers the 48 counties in California that qualify, ranked against each other statewide. The median across all 48 is 0.2%.

Iranian Americans: full group profile →

CaliforniaAll states All rankings

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 –

01Orange County, CACA3,149,5071.0%–

02Los Angeles County, CACA9,694,9340.9%–

03Marin County, CACA253,6940.9%–

04Santa Clara County, CACA1,914,3910.9%–

05Contra Costa County, CACA1,170,0700.7%–

06Trinity County, CACA15,7200.7%–

07San Mateo County, CACA743,5680.7%–

08Placer County, CACA442,0810.5%–

09Ventura County, CACA830,8510.5%–

10San Diego County, CACA3,282,2480.4%–

11Alameda County, CACA1,636,6300.4%–

12Yolo County, CACA224,4100.4%–

13Tehama County, CACA64,6650.4%–

14El Dorado County, CACA192,3230.4%–

15Del Norte County, CACA26,4100.3%–

16Sacramento County, CACA1,618,4600.3%–

17San Francisco County, CACA826,0790.3%–

18Stanislaus County, CACA557,7190.3%–

19Siskiyou County, CACA42,0130.2%–

20Amador County, CACA41,8760.2%–

21Santa Barbara County, CACA442,0650.2%–

22Sonoma County, CACA486,4440.2%–

23Solano County, CACA455,3760.2%–

24Lassen County, CACA28,1170.2%–

25Santa Cruz County, CACA258,8520.2%–

26San Bernardino County, CACA2,224,0910.2%–

27San Benito County, CACA70,0820.2%–

28Riverside County, CACA2,544,9160.2%–

29Fresno County, CACA1,035,4560.2%–

30San Joaquin County, CACA823,8150.1%–

31Mono County, CACA12,5050.1%–

32Merced County, CACA297,2600.1%–

33San Luis Obispo County, CACA282,3670.1%–

34Shasta County, CACA181,6480.1%–

35Butte County, CACA209,2110.1%–

36Mendocino County, CACA88,1220.1%–

37Kern County, CACA927,0680.1%–

38Lake County, CACA67,7720.1%–

39Humboldt County, CACA131,6470.1%–

40Napa County, CACA132,9490.1%–

41Monterey County, CACA433,7290.1%–

42Nevada County, CACA101,9110.1%–

43Mariposa County, CACA16,9180.1%–

44Sutter County, CACA98,7870.1%–

45Tuolumne County, CACA53,1600.1%–

46Tulare County, CACA485,1460.0%–

47Madera County, CACA167,9270.0%–

48Kings County, CACA154,3270.0%–

SHOWING 1–48 OF 48

Download CSV (full list, 48 rows)

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