RANKING · 2024 ACS · 51 SHOWN OF 51

Largest Romanian population, California counties

California counties ranked by the number of residents who are Romanian ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 51 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 POPULATIONVS 2010

01Los Angeles County, CACA9,694,93415,235−18%

02Orange County, CACA3,149,5077,654−19%

03Sacramento County, CACA1,618,4606,987+12%

04Riverside County, CACA2,544,9164,229−10%

05San Diego County, CACA3,282,2484,002−2%

06Santa Clara County, CACA1,914,3913,110−6%

07Alameda County, CACA1,636,6303,032+30%

08San Francisco County, CACA826,0791,961+1%

09Placer County, CACA442,0811,837+114%

10San Bernardino County, CACA2,224,0911,537−37%

11San Mateo County, CACA743,5681,248+27%

12Contra Costa County, CACA1,170,0701,244−18%

13Ventura County, CACA830,8511,196−31%

14Sonoma County, CACA486,444585+1%

15Fresno County, CACA1,035,456563+6%

16Marin County, CACA253,694553−58%

17Kern County, CACA927,068532+55%

18Santa Cruz County, CACA258,852489−15%

19Yolo County, CACA224,410407+4%

20Santa Barbara County, CACA442,065339−32%

21Butte County, CACA209,211313−8%

22Solano County, CACA455,376270+12%

23San Luis Obispo County, CACA282,367265−19%

24El Dorado County, CACA192,323249−23%

25Yuba County, CACA88,691218−73%

26San Joaquin County, CACA823,815205−52%

27Stanislaus County, CACA557,719205−79%

28Nevada County, CACA101,911204+22%

29Monterey County, CACA433,729136−53%

30Kings County, CACA154,327134+738%

31Tulare County, CACA485,146127+92%

32Madera County, CACA167,92796−8%

33Mendocino County, CACA88,12287−41%

34Napa County, CACA132,94986+25%

35Humboldt County, CACA131,64783−25%

36Merced County, CACA297,26071+54%

37Tuolumne County, CACA53,16062+11%

38Shasta County, CACA181,64855−50%

39Lake County, CACA67,77254−43%

40Sutter County, CACA98,78736+16%

41Calaveras County, CACA46,60530+36%

42Tehama County, CACA64,66528−69%

43Siskiyou County, CACA42,01326−71%

44Del Norte County, CACA26,41018–

45Lassen County, CACA28,11716+60%

46Amador County, CACA41,87614–

47San Benito County, CACA70,08214–

48Inyo County, CACA18,15812−29%

49Sierra County, CACA3,0989–

50Alpine County, CACA1,0436–

51Imperial County, CACA181,4115−50%

SHOWING 1–51 OF 51

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES