RANKING · 2024 ACS · 99 SHOWN OF 99

Largest Scotch-Irish population, Iowa counties

Iowa counties ranked by the number of residents who are Scotch-Irish ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

Scotch-Irish 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

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS 2010

01Polk County, IAIA516,5463,882−42%

02Linn County, IAIA232,0281,931−44%

03Scott County, IAIA175,2591,383−41%

04Johnson County, IAIA160,0441,151−46%

05Black Hawk County, IAIA131,532706−63%

06Story County, IAIA101,291622−51%

07Woodbury County, IAIA106,649528−58%

08Webster County, IAIA36,838509−17%

09Pottawattamie County, IAIA92,996489−72%

10Warren County, IAIA57,331458−46%

11Muscatine County, IAIA41,853417−35%

12Dallas County, IAIA118,457411−59%

13Clinton County, IAIA46,002311−40%

14Jasper County, IAIA38,153304−65%

15Cerro Gordo County, IAIA42,372284−51%

16Dubuque County, IAIA99,381252−58%

17Des Moines County, IAIA38,077246−70%

18Marshall County, IAIA39,890234−73%

19Bremer County, IAIA25,296214−6%

20Iowa County, IAIA16,504211−8%

21Lee County, IAIA32,306203−64%

22Mahaska County, IAIA21,880201−56%

23Wapello County, IAIA35,210198−63%

24Benton County, IAIA26,004191−53%

25Madison County, IAIA17,270191−45%

26Monroe County, IAIA7,406180+46%

27Poweshiek County, IAIA18,368168−66%

28Boone County, IAIA26,799165−63%

29Sioux County, IAIA36,774146−61%

30Union County, IAIA11,829143−50%

31Montgomery County, IAIA10,002142−22%

32Henry County, IAIA19,349132−71%

33Washington County, IAIA22,667127−74%

34Van Buren County, IAIA7,131126−45%

35Hamilton County, IAIA14,944124−64%

36Marion County, IAIA34,192120−81%

37Mills County, IAIA14,793118−64%

38Allamakee County, IAIA14,238113+18%

39Buchanan County, IAIA20,883112−55%

40Harrison County, IAIA14,623108−50%

41Page County, IAIA14,856103−67%

42Greene County, IAIA8,65898−49%

43Grundy County, IAIA12,36197−50%

44Appanoose County, IAIA12,07790−69%

45Lucas County, IAIA8,84790−69%

46Hardin County, IAIA16,45586−61%

47Floyd County, IAIA14,90184−60%

48Cedar County, IAIA18,35983−61%

49Plymouth County, IAIA25,69783−74%

50Keokuk County, IAIA9,79779−57%

51Winneshiek County, IAIA19,73379−54%

52Fayette County, IAIA19,04776−35%

53Fremont County, IAIA6,52275−59%

54Jackson County, IAIA19,28871−56%

55Decatur County, IAIA7,65567−59%

56Butler County, IAIA14,04967−57%

57Palo Alto County, IAIA8,89967+12%

58Cass County, IAIA12,96066−78%

59Buena Vista County, IAIA20,44965−68%

60Clay County, IAIA16,20265−70%

61Clayton County, IAIA16,84565−51%

62Dickinson County, IAIA18,07765−66%

63Jefferson County, IAIA15,29165−87%

64Shelby County, IAIA11,68963−62%

65Louisa County, IAIA10,41661−81%

66Pocahontas County, IAIA6,81961−5%

67Calhoun County, IAIA9,56258−52%

68Chickasaw County, IAIA11,66357−36%

69Hancock County, IAIA10,52857−32%

70Sac County, IAIA9,52557−75%

71Tama County, IAIA16,79657−79%

72Guthrie County, IAIA10,78256−78%

73Kossuth County, IAIA14,32255−68%

74Wayne County, IAIA6,73855−80%

75Franklin County, IAIA9,86854−59%

76Wright County, IAIA12,80153−80%

77Winnebago County, IAIA10,25149−42%

78Mitchell County, IAIA10,65044−62%

79Clarke County, IAIA9,57442−49%

80Ida County, IAIA6,77742+56%

81Delaware County, IAIA17,67440−47%

82Jones County, IAIA21,25339−93%

83Taylor County, IAIA5,83538−74%

84Monona County, IAIA8,53936−65%

85Crawford County, IAIA16,23729−74%

86Worth County, IAIA7,33828−35%

87Howard County, IAIA9,41526−68%

88Osceola County, IAIA5,98025−51%

89Ringgold County, IAIA4,64225−77%

90Carroll County, IAIA20,30323−90%

91Cherokee County, IAIA11,36923−91%

92Audubon County, IAIA5,50922−70%

93Adair County, IAIA7,40320−82%

94Humboldt County, IAIA9,40919−84%

95Emmet County, IAIA9,10718−84%

96O'Brien County, IAIA14,22018−73%

97Adams County, IAIA3,61716−76%

98Lyon County, IAIA12,3549−78%

99Davis County, IAIA9,2307−90%

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES