RANKING · 2024 ACS · 51 SHOWN OF 51

Highest Romanian population share, California counties

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 51 counties in California that qualify, ranked against each other statewide.

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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

01Sacramento County, CACA1,618,4600.4%–

02Placer County, CACA442,0810.4%–

03Alpine County, CACA1,0430.4%–

04Sierra County, CACA3,0980.3%–

05Yuba County, CACA88,6910.3%–

06Orange County, CACA3,149,5070.2%–

07San Francisco County, CACA826,0790.2%–

08Marin County, CACA253,6940.2%–

09Nevada County, CACA101,9110.2%–

10Santa Cruz County, CACA258,8520.2%–

11Yolo County, CACA224,4100.2%–

12Alameda County, CACA1,636,6300.2%–

13Riverside County, CACA2,544,9160.2%–

14San Mateo County, CACA743,5680.2%–

15Santa Clara County, CACA1,914,3910.2%–

16Los Angeles County, CACA9,694,9340.2%–

17Butte County, CACA209,2110.2%–

18Ventura County, CACA830,8510.1%–

19El Dorado County, CACA192,3230.1%–

20San Diego County, CACA3,282,2480.1%–

21Sonoma County, CACA486,4440.1%–

22Tuolumne County, CACA53,1600.1%–

23Contra Costa County, CACA1,170,0700.1%–

24Mendocino County, CACA88,1220.1%–

25San Luis Obispo County, CACA282,3670.1%–

26Kings County, CACA154,3270.1%–

27Lake County, CACA67,7720.1%–

28Santa Barbara County, CACA442,0650.1%–

29San Bernardino County, CACA2,224,0910.1%–

30Del Norte County, CACA26,4100.1%–

31Calaveras County, CACA46,6050.1%–

32Inyo County, CACA18,1580.1%–

33Napa County, CACA132,9490.1%–

34Humboldt County, CACA131,6470.1%–

35Siskiyou County, CACA42,0130.1%–

36Solano County, CACA455,3760.1%–

37Madera County, CACA167,9270.1%–

38Kern County, CACA927,0680.1%–

39Fresno County, CACA1,035,4560.1%–

40Lassen County, CACA28,1170.1%–

41Tehama County, CACA64,6650.0%–

42Stanislaus County, CACA557,7190.0%–

43Sutter County, CACA98,7870.0%–

44Amador County, CACA41,8760.0%–

45Monterey County, CACA433,7290.0%–

46Shasta County, CACA181,6480.0%–

47Tulare County, CACA485,1460.0%–

48San Joaquin County, CACA823,8150.0%–

49Merced County, CACA297,2600.0%–

50San Benito County, CACA70,0820.0%–

51Imperial County, CACA181,4110.0%–

SHOWING 1–51 OF 51

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