RANKING · 2020 CENSUS · 73 SHOWN OF 73

Largest Finnish population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Finnish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 73 counties in Iowa that qualify, ranked against each other statewide.

Finnish 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

RANKPLACESTATEPOPFINNISH POPULATIONVS 2010

01Linn County, IAIA232,028368+50%

02Polk County, IAIA516,546328−30%

03Johnson County, IAIA160,044220+29%

04Benton County, IAIA26,004204+827%

05Story County, IAIA101,291151+91%

06Black Hawk County, IAIA131,532139−14%

07Warren County, IAIA57,331125+64%

08Scott County, IAIA175,259102−4%

09Woodbury County, IAIA106,64997+13%

10Muscatine County, IAIA41,85366−55%

11Dallas County, IAIA118,45765−57%

12Pottawattamie County, IAIA92,99664+31%

13Winneshiek County, IAIA19,73364−47%

14Dubuque County, IAIA99,38150−36%

15Mills County, IAIA14,79346+667%

16Boone County, IAIA26,79944+175%

17Clay County, IAIA16,20240+150%

18Ida County, IAIA6,77734+183%

19Madison County, IAIA17,27030+400%

20Cerro Gordo County, IAIA42,37228−67%

21Cedar County, IAIA18,35927−16%

22Hancock County, IAIA10,52825–

23Monroe County, IAIA7,40625+79%

24Grundy County, IAIA12,36124+500%

25Marion County, IAIA34,19224+118%

26Mahaska County, IAIA21,88023+15%

27Clinton County, IAIA46,00221−76%

28Jasper County, IAIA38,15320−52%

29Harrison County, IAIA14,62319+375%

30Marshall County, IAIA39,89017−37%

31Adair County, IAIA7,40317+42%

32Bremer County, IAIA25,29617–

33Buchanan County, IAIA20,88316−11%

34Hamilton County, IAIA14,94415+200%

35Sac County, IAIA9,52514−46%

36Worth County, IAIA7,33814+133%

37Lee County, IAIA32,30612−45%

38Union County, IAIA11,82912–

39Washington County, IAIA22,66712–

40O'Brien County, IAIA14,22012–

41Calhoun County, IAIA9,56211–

42Iowa County, IAIA16,50411–

43Page County, IAIA14,85611+175%

44Adams County, IAIA3,61710–

45Mitchell County, IAIA10,65010−50%

46Decatur County, IAIA7,6559–

47Humboldt County, IAIA9,4099–

48Kossuth County, IAIA14,3229−18%

49Des Moines County, IAIA38,0778−27%

50Greene County, IAIA8,6588+167%

51Jefferson County, IAIA15,2918−71%

52Carroll County, IAIA20,3038−20%

53Crawford County, IAIA16,2377−77%

54Fremont County, IAIA6,5227+0%

55Poweshiek County, IAIA18,3687−76%

56Butler County, IAIA14,0495+25%

57Plymouth County, IAIA25,6975−75%

58Appanoose County, IAIA12,0774−87%

59Buena Vista County, IAIA20,4494−90%

60Webster County, IAIA36,8383−92%

61Chickasaw County, IAIA11,6632−33%

62Dickinson County, IAIA18,0772−89%

63Floyd County, IAIA14,9012−94%

64Monona County, IAIA8,5392−80%

65Osceola County, IAIA5,9802–

66Tama County, IAIA16,7962–

67Wright County, IAIA12,8012−33%

68Palo Alto County, IAIA8,8992−85%

69Wapello County, IAIA35,2102–

70Cherokee County, IAIA11,3691−50%

71Jackson County, IAIA19,2881−94%

72Van Buren County, IAIA7,1311−94%

73Jones County, IAIA21,2531–

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS