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 (2023 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.

IowaAll states All rankings

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

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2000

01Monroe County, IAIA7,4062.4%–

02Van Buren County, IAIA7,1311.7%–

03Montgomery County, IAIA10,0021.4%–

04Webster County, IAIA36,8381.4%–

05Iowa County, IAIA16,5041.3%–

06Union County, IAIA11,8291.2%–

07Fremont County, IAIA6,5221.2%–

08Madison County, IAIA17,2701.1%–

09Greene County, IAIA8,6581.1%–

10Lucas County, IAIA8,8471.0%–

11Muscatine County, IAIA41,8531.0%–

12Mahaska County, IAIA21,8800.9%–

13Poweshiek County, IAIA18,3680.9%–

14Pocahontas County, IAIA6,8190.9%–

15Decatur County, IAIA7,6550.9%–

16Bremer County, IAIA25,2960.8%–

17Wayne County, IAIA6,7380.8%–

18Warren County, IAIA57,3310.8%–

19Linn County, IAIA232,0280.8%–

20Hamilton County, IAIA14,9440.8%–

21Mills County, IAIA14,7930.8%–

22Allamakee County, IAIA14,2380.8%–

23Jasper County, IAIA38,1530.8%–

24Keokuk County, IAIA9,7970.8%–

25Scott County, IAIA175,2590.8%–

26Grundy County, IAIA12,3610.8%–

27Polk County, IAIA516,5460.8%–

28Palo Alto County, IAIA8,8990.8%–

29Benton County, IAIA26,0040.7%–

30Appanoose County, IAIA12,0770.7%–

31Harrison County, IAIA14,6230.7%–

32Johnson County, IAIA160,0440.7%–

33Page County, IAIA14,8560.7%–

34Clinton County, IAIA46,0020.7%–

35Cerro Gordo County, IAIA42,3720.7%–

36Henry County, IAIA19,3490.7%–

37Taylor County, IAIA5,8350.6%–

38Des Moines County, IAIA38,0770.6%–

39Story County, IAIA101,2910.6%–

40Boone County, IAIA26,7990.6%–

41Lee County, IAIA32,3060.6%–

42Ida County, IAIA6,7770.6%–

43Calhoun County, IAIA9,5620.6%–

44Sac County, IAIA9,5250.6%–

45Marshall County, IAIA39,8900.6%–

46Louisa County, IAIA10,4160.6%–

47Washington County, IAIA22,6670.6%–

48Wapello County, IAIA35,2100.6%–

49Floyd County, IAIA14,9010.5%–

50Franklin County, IAIA9,8680.5%–

51Buchanan County, IAIA20,8830.5%–

52Black Hawk County, IAIA131,5320.5%–

53Ringgold County, IAIA4,6420.5%–

54Shelby County, IAIA11,6890.5%–

55Hancock County, IAIA10,5280.5%–

56Guthrie County, IAIA10,7820.5%–

57Pottawattamie County, IAIA92,9960.5%–

58Hardin County, IAIA16,4550.5%–

59Cass County, IAIA12,9600.5%–

60Woodbury County, IAIA106,6490.5%–

61Chickasaw County, IAIA11,6630.5%–

62Butler County, IAIA14,0490.5%–

63Winnebago County, IAIA10,2510.5%–

64Cedar County, IAIA18,3590.5%–

65Adams County, IAIA3,6170.4%–

66Clarke County, IAIA9,5740.4%–

67Monona County, IAIA8,5390.4%–

68Mitchell County, IAIA10,6500.4%–

69Wright County, IAIA12,8010.4%–

70Jefferson County, IAIA15,2910.4%–

71Osceola County, IAIA5,9800.4%–

72Sioux County, IAIA36,7740.4%–

73Winneshiek County, IAIA19,7330.4%–

74Clay County, IAIA16,2020.4%–

75Fayette County, IAIA19,0470.4%–

76Audubon County, IAIA5,5090.4%–

77Clayton County, IAIA16,8450.4%–

78Worth County, IAIA7,3380.4%–

79Dallas County, IAIA118,4570.4%–

80Kossuth County, IAIA14,3220.4%–

81Jackson County, IAIA19,2880.4%–

82Dickinson County, IAIA18,0770.4%–

83Marion County, IAIA34,1920.4%–

84Tama County, IAIA16,7960.3%–

85Plymouth County, IAIA25,6970.3%–

86Buena Vista County, IAIA20,4490.3%–

87Howard County, IAIA9,4150.3%–

88Adair County, IAIA7,4030.3%–

89Dubuque County, IAIA99,3810.3%–

90Delaware County, IAIA17,6740.2%–

91Cherokee County, IAIA11,3690.2%–

92Humboldt County, IAIA9,4090.2%–

93Emmet County, IAIA9,1070.2%–

94Jones County, IAIA21,2530.2%–

95Crawford County, IAIA16,2370.2%–

96O'Brien County, IAIA14,2200.1%–

97Carroll County, IAIA20,3030.1%–

98Davis County, IAIA9,2300.1%–

99Lyon County, IAIA12,3540.1%–

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