RANKING · 2010 CENSUS · 47 SHOWN OF 47

Highest Romanian population share, California counties · 2010

California counties ranked by the share of all residents who are Romanian ancestry (2023 American Community Survey). A concentration measure: Romanian residents as a percentage of total population. This list covers the 47 counties in California that qualify, ranked against each other statewide.

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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

RANKPLACESTATEPOPROMANIAN SHAREVS 2000

01Yuba County, CACA88,6911.1%–

02Marin County, CACA253,6940.5%–

03Sacramento County, CACA1,618,4600.4%–

04Orange County, CACA3,149,5070.3%–

05Placer County, CACA442,0810.3%–

06San Francisco County, CACA826,0790.2%–

07Santa Cruz County, CACA258,8520.2%–

08Riverside County, CACA2,544,9160.2%–

09Ventura County, CACA830,8510.2%–

10Siskiyou County, CACA42,0130.2%–

11Yolo County, CACA224,4100.2%–

12Los Angeles County, CACA9,694,9340.2%–

13Santa Clara County, CACA1,914,3910.2%–

14Stanislaus County, CACA557,7190.2%–

15El Dorado County, CACA192,3230.2%–

16Nevada County, CACA101,9110.2%–

17Mendocino County, CACA88,1220.2%–

18Alameda County, CACA1,636,6300.2%–

19Butte County, CACA209,2110.2%–

20Contra Costa County, CACA1,170,0700.1%–

21Lake County, CACA67,7720.1%–

22Tehama County, CACA64,6650.1%–

23San Mateo County, CACA743,5680.1%–

24San Diego County, CACA3,282,2480.1%–

25San Luis Obispo County, CACA282,3670.1%–

26San Bernardino County, CACA2,224,0910.1%–

27Sonoma County, CACA486,4440.1%–

28Santa Barbara County, CACA442,0650.1%–

29Tuolumne County, CACA53,1600.1%–

30Inyo County, CACA18,1580.1%–

31Humboldt County, CACA131,6470.1%–

32Monterey County, CACA433,7290.1%–

33Mariposa County, CACA16,9180.1%–

34Madera County, CACA167,9270.1%–

35San Joaquin County, CACA823,8150.1%–

36Shasta County, CACA181,6480.1%–

37Solano County, CACA455,3760.1%–

38Fresno County, CACA1,035,4560.1%–

39Napa County, CACA132,9490.1%–

40Calaveras County, CACA46,6050.0%–

41Kern County, CACA927,0680.0%–

42Sutter County, CACA98,7870.0%–

43Lassen County, CACA28,1170.0%–

44Merced County, CACA297,2600.0%–

45Tulare County, CACA485,1460.0%–

46Kings County, CACA154,3270.0%–

47Imperial County, CACA181,4110.0%–

SHOWING 1–47 OF 47

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