RANKING · 2024 ACS · 99 SHOWN OF 99

Highest Scotch-Irish population share, Iowa counties

Iowa counties ranked by the share of all residents who are Scotch-Irish ancestry (2024 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 0.5%. Biggest climber in the top 100 since 2020: Webster County, IA, up 75 places to #4.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01▲16Monroe County, IAIA7,4062.4%+0.8 pts

02▲6Van Buren County, IAIA7,1311.7%−1.2 pts

03▲6Montgomery County, IAIA10,0021.4%−0.3 pts

04▲75Webster County, IAIA36,8381.4%−0.2 pts

05▲20Iowa County, IAIA16,5041.3%−0.1 pts

06▼2Union County, IAIA11,8291.2%−1.1 pts

07▲49Fremont County, IAIA6,5221.2%−1.3 pts

08▲49Madison County, IAIA17,2701.1%−1.1 pts

09▼2Greene County, IAIA8,6581.1%−0.9 pts

10▲51Lucas County, IAIA8,8471.0%−2.1 pts

11▲56Muscatine County, IAIA41,8531.0%−0.5 pts

12▲46Mahaska County, IAIA21,8800.9%−1.1 pts

13▲1Poweshiek County, IAIA18,3680.9%−1.7 pts

14▲38Pocahontas County, IAIA6,8190.9%0.0 pts

15▼9Decatur County, IAIA7,6550.9%−1.1 pts

16▲21Bremer County, IAIA25,2960.8%−0.1 pts

17▼16Wayne County, IAIA6,7380.8%−3.4 pts

18▲17Warren County, IAIA57,3310.8%−1.0 pts

19▲22Linn County, IAIA232,0280.8%−0.8 pts

20▼5Hamilton County, IAIA14,9440.8%−1.3 pts

21▲5Mills County, IAIA14,7930.8%−1.4 pts

22▲60Allamakee County, IAIA14,2380.8%+0.1 pts

23▲53Jasper County, IAIA38,1530.8%−1.6 pts

24▼13Keokuk County, IAIA9,7970.8%−0.9 pts

25▲40Scott County, IAIA175,2590.8%−0.7 pts

26▼10Grundy County, IAIA12,3610.8%−0.8 pts

27▲2Polk County, IAIA516,5460.8%−0.8 pts

28▼5Palo Alto County, IAIA8,8990.8%+0.1 pts

29▲13Benton County, IAIA26,0040.7%−0.8 pts

30▲24Appanoose County, IAIA12,0770.7%−1.5 pts

31▼10Harrison County, IAIA14,6230.7%−0.7 pts

32▼4Johnson County, IAIA160,0440.7%−1.0 pts

33▲33Page County, IAIA14,8560.7%−1.3 pts

34▲39Clinton County, IAIA46,0020.7%−0.4 pts

35▲57Cerro Gordo County, IAIA42,3720.7%−0.6 pts

36▼34Henry County, IAIA19,3490.7%−1.6 pts

37▲16Taylor County, IAIA5,8350.6%−1.7 pts

38▼16Des Moines County, IAIA38,0770.6%−1.4 pts

39Story County, IAIA101,2910.6%−0.8 pts

40▼37Boone County, IAIA26,7990.6%−1.1 pts

41▲18Lee County, IAIA32,3060.6%−0.9 pts

42▲53Ida County, IAIA6,7770.6%+0.2 pts

43▲20Calhoun County, IAIA9,5620.6%−0.6 pts

44▲26Sac County, IAIA9,5250.6%−1.6 pts

45▼18Marshall County, IAIA39,8900.6%−1.6 pts

46▼16Louisa County, IAIA10,4160.6%−2.2 pts

47▼37Washington County, IAIA22,6670.6%−1.7 pts

48▼29Wapello County, IAIA35,2100.6%−1.0 pts

49▼6Floyd County, IAIA14,9010.5%−0.7 pts

50▼14Franklin County, IAIA9,8680.5%−0.7 pts

51▲24Buchanan County, IAIA20,8830.5%−0.6 pts

52▼18Black Hawk County, IAIA131,5320.5%−1.0 pts

53▼48Ringgold County, IAIA4,6420.5%−1.6 pts

54▲34Shelby County, IAIA11,6890.5%−0.8 pts

55▼37Hancock County, IAIA10,5280.5%−0.2 pts

56▼25Guthrie County, IAIA10,7820.5%−1.8 pts

57▼11Pottawattamie County, IAIA92,9960.5%−1.4 pts

58▲19Hardin County, IAIA16,4550.5%−0.7 pts

59▼35Cass County, IAIA12,9600.5%−1.6 pts

60▼5Woodbury County, IAIA106,6490.5%−0.7 pts

61▲3Chickasaw County, IAIA11,6630.5%−0.2 pts

62▼49Butler County, IAIA14,0490.5%−0.6 pts

63▲30Winnebago County, IAIA10,2510.5%−0.3 pts

64▲23Cedar County, IAIA18,3590.5%−0.7 pts

65▲13Adams County, IAIA3,6170.4%−1.2 pts

66▼21Clarke County, IAIA9,5740.4%−0.5 pts

67▲17Monona County, IAIA8,5390.4%−0.7 pts

68▼28Mitchell County, IAIA10,6500.4%−0.6 pts

69Wright County, IAIA12,8010.4%−1.5 pts

70▼37Jefferson County, IAIA15,2910.4%−2.6 pts

71▼21Osceola County, IAIA5,9800.4%−0.4 pts

72▼1Sioux County, IAIA36,7740.4%−0.7 pts

73▼41Winneshiek County, IAIA19,7330.4%−0.4 pts

74▼23Clay County, IAIA16,2020.4%−0.9 pts

75▼7Fayette County, IAIA19,0470.4%−0.2 pts

76▼64Audubon County, IAIA5,5090.4%−0.8 pts

77▼3Clayton County, IAIA16,8450.4%−0.3 pts

78▲8Worth County, IAIA7,3380.4%−0.2 pts

79▼31Dallas County, IAIA118,4570.4%−1.2 pts

80▼20Kossuth County, IAIA14,3220.4%−0.7 pts

81▲2Jackson County, IAIA19,2880.4%−0.4 pts

82▼62Dickinson County, IAIA18,0770.4%−0.8 pts

83▼3Marion County, IAIA34,1920.4%−1.5 pts

84▼40Tama County, IAIA16,7960.3%−1.2 pts

85▼13Plymouth County, IAIA25,6970.3%−0.9 pts

86▲10Buena Vista County, IAIA20,4490.3%−0.7 pts

87▼38Howard County, IAIA9,4150.3%−0.6 pts

88▼50Adair County, IAIA7,4030.3%−1.2 pts

89▲1Dubuque County, IAIA99,3810.3%−0.4 pts

90▲8Delaware County, IAIA17,6740.2%−0.2 pts

91Cherokee County, IAIA11,3690.2%−2.0 pts

92▼3Humboldt County, IAIA9,4090.2%−1.0 pts

93▼12Emmet County, IAIA9,1070.2%−0.9 pts

94▼9Jones County, IAIA21,2530.2%−2.4 pts

95▲2Crawford County, IAIA16,2370.2%−0.5 pts

96▲3O'Brien County, IAIA14,2200.1%−0.3 pts

97▼3Carroll County, IAIA20,3030.1%−1.0 pts

98▼51Davis County, IAIA9,2300.1%−0.7 pts

99▼37Lyon County, IAIA12,3540.1%−0.3 pts

SHOWING 1–99 OF 99

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES