RANKING · 2020 CENSUS · 73 SHOWN OF 73

Highest Finnish population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Finnish ancestry (2023 American Community Survey). A concentration measure: Finnish residents as a percentage of total population. This list covers the 73 counties in Iowa 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

RANKPLACESTATEPOPFINNISH SHAREVS 2000

01Benton County, IAIA26,0040.8%–

02Ida County, IAIA6,7770.5%–

03Monroe County, IAIA7,4060.3%–

04Winneshiek County, IAIA19,7330.3%–

05Mills County, IAIA14,7930.3%–

06Adams County, IAIA3,6170.3%–

07Clay County, IAIA16,2020.2%–

08Warren County, IAIA57,3310.2%–

09Adair County, IAIA7,4030.2%–

10Hancock County, IAIA10,5280.2%–

11Grundy County, IAIA12,3610.2%–

12Worth County, IAIA7,3380.2%–

13Madison County, IAIA17,2700.2%–

14Boone County, IAIA26,7990.2%–

15Linn County, IAIA232,0280.2%–

16Story County, IAIA101,2910.2%–

17Muscatine County, IAIA41,8530.2%–

18Cedar County, IAIA18,3590.1%–

19Johnson County, IAIA160,0440.1%–

20Sac County, IAIA9,5250.1%–

21Harrison County, IAIA14,6230.1%–

22Calhoun County, IAIA9,5620.1%–

23Decatur County, IAIA7,6550.1%–

24Black Hawk County, IAIA131,5320.1%–

25Mahaska County, IAIA21,8800.1%–

26Fremont County, IAIA6,5220.1%–

27Hamilton County, IAIA14,9440.1%–

28Union County, IAIA11,8290.1%–

29Humboldt County, IAIA9,4090.1%–

30Woodbury County, IAIA106,6490.1%–

31Mitchell County, IAIA10,6500.1%–

32Greene County, IAIA8,6580.1%–

33O'Brien County, IAIA14,2200.1%–

34Buchanan County, IAIA20,8830.1%–

35Page County, IAIA14,8560.1%–

36Marion County, IAIA34,1920.1%–

37Dallas County, IAIA118,4570.1%–

38Pottawattamie County, IAIA92,9960.1%–

39Iowa County, IAIA16,5040.1%–

40Bremer County, IAIA25,2960.1%–

41Polk County, IAIA516,5460.1%–

42Cerro Gordo County, IAIA42,3720.1%–

43Kossuth County, IAIA14,3220.1%–

44Scott County, IAIA175,2590.1%–

45Washington County, IAIA22,6670.1%–

46Jasper County, IAIA38,1530.1%–

47Dubuque County, IAIA99,3810.1%–

48Clinton County, IAIA46,0020.0%–

49Jefferson County, IAIA15,2910.0%–

50Marshall County, IAIA39,8900.0%–

51Crawford County, IAIA16,2370.0%–

52Carroll County, IAIA20,3030.0%–

53Poweshiek County, IAIA18,3680.0%–

54Lee County, IAIA32,3060.0%–

55Butler County, IAIA14,0490.0%–

56Osceola County, IAIA5,9800.0%–

57Appanoose County, IAIA12,0770.0%–

58Monona County, IAIA8,5390.0%–

59Palo Alto County, IAIA8,8990.0%–

60Des Moines County, IAIA38,0770.0%–

61Buena Vista County, IAIA20,4490.0%–

62Plymouth County, IAIA25,6970.0%–

63Chickasaw County, IAIA11,6630.0%–

64Wright County, IAIA12,8010.0%–

65Van Buren County, IAIA7,1310.0%–

66Floyd County, IAIA14,9010.0%–

67Tama County, IAIA16,7960.0%–

68Dickinson County, IAIA18,0770.0%–

69Cherokee County, IAIA11,3690.0%–

70Webster County, IAIA36,8380.0%–

71Wapello County, IAIA35,2100.0%–

72Jackson County, IAIA19,2880.0%–

73Jones County, IAIA21,2530.0%–

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