RANKING · 2010 CENSUS · 99 SHOWN OF 99

Largest American population, Iowa counties · 2010

Iowa counties ranked by the number of residents who are American ancestry, from the 2010 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. The median across all 99 is 1,017.

American ancestry: full group profile →

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SAME RANKING BYCities States Metros

RELATEDHighest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share Largest Iraqi population

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN POPULATIONVS –

01Polk County, IAIA516,54618,978–

02Scott County, IAIA175,2599,387–

03Black Hawk County, IAIA131,5329,104–

04Linn County, IAIA232,0289,025–

05Dubuque County, IAIA99,3815,177–

06Johnson County, IAIA160,0444,587–

07Pottawattamie County, IAIA92,9964,306–

08Woodbury County, IAIA106,6494,138–

09Des Moines County, IAIA38,0773,754–

10Dallas County, IAIA118,4573,673–

11Wapello County, IAIA35,2103,631–

12Lee County, IAIA32,3063,393–

13Clinton County, IAIA46,0023,214–

14Warren County, IAIA57,3313,051–

15Story County, IAIA101,2912,689–

16Muscatine County, IAIA41,8532,618–

17Jasper County, IAIA38,1532,526–

18Marion County, IAIA34,1922,512–

19Marshall County, IAIA39,8901,978–

20Page County, IAIA14,8561,934–

21Henry County, IAIA19,3491,873–

22Mahaska County, IAIA21,8801,871–

23Cerro Gordo County, IAIA42,3721,700–

24Washington County, IAIA22,6671,557–

25Fayette County, IAIA19,0471,519–

26Plymouth County, IAIA25,6971,491–

27Boone County, IAIA26,7991,486–

28Buchanan County, IAIA20,8831,478–

29Union County, IAIA11,8291,451–

30Bremer County, IAIA25,2961,442–

31Jackson County, IAIA19,2881,348–

32Tama County, IAIA16,7961,230–

33Webster County, IAIA36,8381,227–

34Davis County, IAIA9,2301,184–

35Madison County, IAIA17,2701,181–

36Jones County, IAIA21,2531,176–

37Fremont County, IAIA6,5221,164–

38Cedar County, IAIA18,3591,147–

39Delaware County, IAIA17,6741,140–

40Sioux County, IAIA36,7741,136–

41Montgomery County, IAIA10,0021,117–

42Carroll County, IAIA20,3031,095–

43Chickasaw County, IAIA11,6631,095–

44Benton County, IAIA26,0041,091–

45Mills County, IAIA14,7931,083–

46Floyd County, IAIA14,9011,072–

47Guthrie County, IAIA10,7821,036–

48Jefferson County, IAIA15,2911,024–

49Butler County, IAIA14,0491,021–

50O'Brien County, IAIA14,2201,017–

51Keokuk County, IAIA9,797993–

52Appanoose County, IAIA12,077992–

53Poweshiek County, IAIA18,368980–

54Louisa County, IAIA10,416975–

55Clayton County, IAIA16,845923–

56Grundy County, IAIA12,361878–

57Harrison County, IAIA14,623838–

58Van Buren County, IAIA7,131835–

59Allamakee County, IAIA14,238816–

60Clay County, IAIA16,202808–

61Decatur County, IAIA7,655784–

62Lucas County, IAIA8,847774–

63Mitchell County, IAIA10,650771–

64Hamilton County, IAIA14,944757–

65Hardin County, IAIA16,455755–

66Iowa County, IAIA16,504748–

67Wright County, IAIA12,801747–

68Taylor County, IAIA5,835740–

69Cass County, IAIA12,960732–

70Kossuth County, IAIA14,322716–

71Winneshiek County, IAIA19,733711–

72Buena Vista County, IAIA20,449701–

73Monroe County, IAIA7,406695–

74Shelby County, IAIA11,689635–

75Wayne County, IAIA6,738634–

76Cherokee County, IAIA11,369625–

77Sac County, IAIA9,525608–

78Franklin County, IAIA9,868598–

79Palo Alto County, IAIA8,899592–

80Ringgold County, IAIA4,642587–

81Humboldt County, IAIA9,409586–

82Crawford County, IAIA16,237578–

83Clarke County, IAIA9,574577–

84Lyon County, IAIA12,354570–

85Greene County, IAIA8,658529–

86Calhoun County, IAIA9,562512–

87Hancock County, IAIA10,528495–

88Adair County, IAIA7,403494–

89Pocahontas County, IAIA6,819487–

90Monona County, IAIA8,539471–

91Dickinson County, IAIA18,077414–

92Audubon County, IAIA5,509345–

93Ida County, IAIA6,777337–

94Howard County, IAIA9,415327–

95Emmet County, IAIA9,107324–

96Winnebago County, IAIA10,251310–

97Osceola County, IAIA5,980283–

98Worth County, IAIA7,338257–

99Adams County, IAIA3,617204–

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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