RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Scotch-Irish population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Scotch-Irish ancestry (2020 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 0.7%.

Scotch-Irish Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01Wayne County, IAIA6,7381.8%−2.4 pts

02Henry County, IAIA19,3491.7%−0.6 pts

03Boone County, IAIA26,7991.6%−0.1 pts

04Union County, IAIA11,8291.5%−0.8 pts

05Ringgold County, IAIA4,6421.4%−0.7 pts

06Decatur County, IAIA7,6551.4%−0.6 pts

07Greene County, IAIA8,6581.3%−0.8 pts

08Van Buren County, IAIA7,1311.3%−1.7 pts

09Montgomery County, IAIA10,0021.2%−0.4 pts

10Washington County, IAIA22,6671.2%−1.1 pts

11Keokuk County, IAIA9,7971.2%−0.6 pts

12Audubon County, IAIA5,5091.1%−0.1 pts

13Butler County, IAIA14,0491.1%+0.1 pts

14Poweshiek County, IAIA18,3681.1%−1.4 pts

15Hamilton County, IAIA14,9441.1%−1.0 pts

16Grundy County, IAIA12,3611.1%−0.4 pts

17Monroe County, IAIA7,4061.1%−0.5 pts

18Hancock County, IAIA10,5281.1%+0.4 pts

19Wapello County, IAIA35,2101.1%−0.5 pts

20Dickinson County, IAIA18,0771.1%−0.1 pts

21Harrison County, IAIA14,6231.1%−0.4 pts

22Des Moines County, IAIA38,0771.0%−1.0 pts

23Palo Alto County, IAIA8,8991.0%+0.4 pts

24Cass County, IAIA12,9601.0%−1.2 pts

25Iowa County, IAIA16,5040.9%−0.5 pts

26Mills County, IAIA14,7930.9%−1.2 pts

27Marshall County, IAIA39,8900.9%−1.2 pts

28Johnson County, IAIA160,0440.9%−0.8 pts

29Polk County, IAIA516,5460.9%−0.7 pts

30Louisa County, IAIA10,4160.9%−1.9 pts

31Guthrie County, IAIA10,7820.9%−1.4 pts

32Winneshiek County, IAIA19,7330.9%+0.1 pts

33Jefferson County, IAIA15,2910.9%−2.2 pts

34Black Hawk County, IAIA131,5320.9%−0.6 pts

35Warren County, IAIA57,3310.9%−1.0 pts

36Franklin County, IAIA9,8680.9%−0.4 pts

37Bremer County, IAIA25,2960.8%−0.1 pts

38Adair County, IAIA7,4030.8%−0.6 pts

39Story County, IAIA101,2910.8%−0.6 pts

40Mitchell County, IAIA10,6500.8%−0.3 pts

41Linn County, IAIA232,0280.8%−0.9 pts

42Benton County, IAIA26,0040.8%−0.8 pts

43Floyd County, IAIA14,9010.8%−0.5 pts

44Tama County, IAIA16,7960.7%−0.8 pts

45Clarke County, IAIA9,5740.7%−0.2 pts

46Pottawattamie County, IAIA92,9960.7%−1.2 pts

47Davis County, IAIA9,2300.7%−0.1 pts

48Dallas County, IAIA118,4570.7%−0.9 pts

49Howard County, IAIA9,4150.7%−0.1 pts

50Osceola County, IAIA5,9800.7%−0.1 pts

51Clay County, IAIA16,2020.7%−0.6 pts

52Pocahontas County, IAIA6,8190.7%−0.2 pts

53Taylor County, IAIA5,8350.7%−1.6 pts

54Appanoose County, IAIA12,0770.7%−1.5 pts

55Woodbury County, IAIA106,6490.7%−0.6 pts

56Fremont County, IAIA6,5220.7%−1.8 pts

57Madison County, IAIA17,2700.7%−1.6 pts

58Mahaska County, IAIA21,8800.6%−1.4 pts

59Lee County, IAIA32,3060.6%−0.9 pts

60Kossuth County, IAIA14,3220.6%−0.4 pts

61Lucas County, IAIA8,8470.6%−2.5 pts

62Lyon County, IAIA12,3540.6%+0.3 pts

63Calhoun County, IAIA9,5620.6%−0.6 pts

64Chickasaw County, IAIA11,6630.6%−0.1 pts

65Scott County, IAIA175,2590.6%−0.9 pts

66Page County, IAIA14,8560.6%−1.4 pts

67Muscatine County, IAIA41,8530.6%−0.9 pts

68Fayette County, IAIA19,0470.6%0.0 pts

69Wright County, IAIA12,8010.6%−1.4 pts

70Sac County, IAIA9,5250.5%−1.6 pts

71Sioux County, IAIA36,7740.5%−0.6 pts

72Plymouth County, IAIA25,6970.5%−0.8 pts

73Clinton County, IAIA46,0020.5%−0.5 pts

74Clayton County, IAIA16,8450.5%−0.2 pts

75Buchanan County, IAIA20,8830.5%−0.7 pts

76Jasper County, IAIA38,1530.5%−1.9 pts

77Hardin County, IAIA16,4550.5%−0.8 pts

78Adams County, IAIA3,6170.5%−1.1 pts

79Webster County, IAIA36,8380.5%−1.1 pts

80Marion County, IAIA34,1920.5%−1.4 pts

81Emmet County, IAIA9,1070.4%−0.7 pts

82Allamakee County, IAIA14,2380.4%−0.3 pts

83Jackson County, IAIA19,2880.4%−0.4 pts

84Monona County, IAIA8,5390.4%−0.7 pts

85Jones County, IAIA21,2530.4%−2.2 pts

86Worth County, IAIA7,3380.4%−0.2 pts

87Cedar County, IAIA18,3590.3%−0.8 pts

88Shelby County, IAIA11,6890.3%−1.0 pts

89Humboldt County, IAIA9,4090.3%−0.9 pts

90Dubuque County, IAIA99,3810.3%−0.3 pts

91Cherokee County, IAIA11,3690.3%−1.9 pts

92Cerro Gordo County, IAIA42,3720.3%−1.1 pts

93Winnebago County, IAIA10,2510.2%−0.5 pts

94Carroll County, IAIA20,3030.2%−0.9 pts

95Ida County, IAIA6,7770.2%−0.2 pts

96Buena Vista County, IAIA20,4490.2%−0.8 pts

97Crawford County, IAIA16,2370.1%−0.5 pts

98Delaware County, IAIA17,6740.1%−0.3 pts

99O'Brien County, IAIA14,2200.1%−0.4 pts

SHOWING 1–99 OF 99

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