RANKING · 2010 CENSUS · 37 SHOWN OF 37

Highest Romanian population share, Iowa counties · 2010

Iowa counties ranked by the share of all residents who are Romanian ancestry (2010 American Community Survey). A concentration measure: Romanian residents as a percentage of total population. This list covers the 37 counties in Iowa that qualify, ranked against each other statewide. The median across all 37 is 0.1%.

Romanian Americans: full group profile →

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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 –

01Cerro Gordo County, IAIA42,3720.2%–

02Jefferson County, IAIA15,2910.2%–

03Johnson County, IAIA160,0440.2%–

04Poweshiek County, IAIA18,3680.2%–

05Dubuque County, IAIA99,3810.2%–

06Monona County, IAIA8,5390.1%–

07Clinton County, IAIA46,0020.1%–

08Butler County, IAIA14,0490.1%–

09Worth County, IAIA7,3380.1%–

10O'Brien County, IAIA14,2200.1%–

11Humboldt County, IAIA9,4090.1%–

12Buchanan County, IAIA20,8830.1%–

13Jackson County, IAIA19,2880.1%–

14Pocahontas County, IAIA6,8190.1%–

15Woodbury County, IAIA106,6490.1%–

16Jasper County, IAIA38,1530.1%–

17Lucas County, IAIA8,8470.1%–

18Linn County, IAIA232,0280.1%–

19Lee County, IAIA32,3060.1%–

20Scott County, IAIA175,2590.0%–

21Polk County, IAIA516,5460.0%–

22Wayne County, IAIA6,7380.0%–

23Appanoose County, IAIA12,0770.0%–

24Story County, IAIA101,2910.0%–

25Bremer County, IAIA25,2960.0%–

26Muscatine County, IAIA41,8530.0%–

27Van Buren County, IAIA7,1310.0%–

28Dallas County, IAIA118,4570.0%–

29Black Hawk County, IAIA131,5320.0%–

30Guthrie County, IAIA10,7820.0%–

31Marion County, IAIA34,1920.0%–

32Harrison County, IAIA14,6230.0%–

33Kossuth County, IAIA14,3220.0%–

34Pottawattamie County, IAIA92,9960.0%–

35Clayton County, IAIA16,8450.0%–

36Marshall County, IAIA39,8900.0%–

37Warren County, IAIA57,3310.0%–

SHOWING 1–37 OF 37

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