RANKING · 2024 ACS · 99 SHOWN OF 99

Largest American population, Iowa counties

Iowa counties ranked by the number of residents who are American 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. The median across all 99 is 814. Biggest climber in the top 100 since 2020: Monona County, IA, up 52 places to #36.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN POPULATIONVS 2010

01Polk County, IAIA516,54616,737−12%

02▲6Woodbury County, IAIA106,6499,234+123%

03▼1Linn County, IAIA232,0288,698−4%

04Black Hawk County, IAIA131,5326,219−32%

05▼2Scott County, IAIA175,2595,736−39%

06Pottawattamie County, IAIA92,9965,708+33%

07Dubuque County, IAIA99,3815,087−2%

08▼3Johnson County, IAIA160,0444,491−2%

09Dallas County, IAIA118,4573,743+2%

10Story County, IAIA101,2912,888+7%

11▲5Muscatine County, IAIA41,8532,782+6%

12▲1Warren County, IAIA57,3312,646−13%

13▲1Jasper County, IAIA38,1532,590+3%

14▼2Des Moines County, IAIA38,0772,551−32%

15▼4Wapello County, IAIA35,2102,249−38%

16▲13Sioux County, IAIA36,7742,210+95%

17▲3Cerro Gordo County, IAIA42,3722,021+19%

18▼3Clinton County, IAIA46,0021,950−39%

19▲25Plymouth County, IAIA25,6971,735+16%

20▲5Marshall County, IAIA39,8901,661−16%

21▼3Fayette County, IAIA19,0471,640+8%

22▼3Marion County, IAIA34,1921,602−36%

23▲4Bremer County, IAIA25,2961,584+10%

24▼7Lee County, IAIA32,3061,529−55%

25▼4Webster County, IAIA36,8381,439+17%

26▼2Mahaska County, IAIA21,8801,364−27%

27▼5Washington County, IAIA22,6671,331−15%

28▼5Benton County, IAIA26,0041,236+13%

29▲7Boone County, IAIA26,7991,190−20%

30▼2Henry County, IAIA19,3491,176−37%

31▼5Buchanan County, IAIA20,8831,160−22%

32▲8Jones County, IAIA21,2531,087−8%

33▲4Clayton County, IAIA16,8451,069+16%

34▼2Carroll County, IAIA20,3031,047−4%

35▲6Jackson County, IAIA19,2881,045−22%

36▲52Monona County, IAIA8,5391,006+114%

37▲23Grundy County, IAIA12,361994+13%

38Poweshiek County, IAIA18,3689790%

39▲3Harrison County, IAIA14,623975+16%

40▼1Clay County, IAIA16,202967+20%

41▲6Davis County, IAIA9,230934−21%

42▲9Hardin County, IAIA16,455927+23%

43▼13Jefferson County, IAIA15,291918−10%

44▼13Cedar County, IAIA18,359917−20%

45▲1Iowa County, IAIA16,504900+20%

46▲2Appanoose County, IAIA12,077881−11%

47▲32Chickasaw County, IAIA11,663854−22%

48▲6Winneshiek County, IAIA19,733830+17%

49▼14Delaware County, IAIA17,674826−28%

50▲13O'Brien County, IAIA14,220814−20%

51▼18Madison County, IAIA17,270787−33%

52▲4Cass County, IAIA12,960755+3%

53▲14Floyd County, IAIA14,901755−30%

54▼4Butler County, IAIA14,049738−28%

55▲3Dickinson County, IAIA18,077736+78%

56▼1Page County, IAIA14,856727−62%

57▲26Hancock County, IAIA10,528716+45%

58▼24Union County, IAIA11,829699−52%

59Keokuk County, IAIA9,797697−30%

60▼3Mills County, IAIA14,793690−36%

61▲14Van Buren County, IAIA7,131678−19%

62▼17Allamakee County, IAIA14,238664−19%

63▲24Lyon County, IAIA12,354644+13%

64▲28Wright County, IAIA12,801643−14%

65▼22Mitchell County, IAIA10,650638−17%

66▲7Winnebago County, IAIA10,251542+75%

67▼6Tama County, IAIA16,796526−57%

68▼19Lucas County, IAIA8,847509−34%

69▼16Crawford County, IAIA16,237508−12%

70▼5Louisa County, IAIA10,416499−49%

71▼1Montgomery County, IAIA10,002498−55%

72▲6Hamilton County, IAIA14,944488−36%

73▲4Fremont County, IAIA6,522471−60%

74▲2Buena Vista County, IAIA20,449464−34%

75▲16Franklin County, IAIA9,868458−23%

76▼7Guthrie County, IAIA10,782456−56%

77▼5Calhoun County, IAIA9,562450−12%

78▲16Clarke County, IAIA9,574446−23%

79▼17Kossuth County, IAIA14,322440−39%

80▲1Taylor County, IAIA5,835432−42%

81▲15Emmet County, IAIA9,107428+32%

82▼14Palo Alto County, IAIA8,899428−28%

83▼1Cherokee County, IAIA11,369424−32%

84▼32Wayne County, IAIA6,738416−34%

85▼5Sac County, IAIA9,525410−33%

86▼2Osceola County, IAIA5,980409+45%

87▼16Shelby County, IAIA11,689397−37%

88▲5Ida County, IAIA6,777372+10%

89Humboldt County, IAIA9,409371−37%

90▼26Monroe County, IAIA7,406365−47%

91▼25Decatur County, IAIA7,655364−54%

92▼6Ringgold County, IAIA4,642364−38%

93▲2Pocahontas County, IAIA6,819361−26%

94▼4Adair County, IAIA7,403307−38%

95▼10Howard County, IAIA9,415299−9%

96▼22Greene County, IAIA8,658275−48%

97▲2Worth County, IAIA7,338267+4%

98Adams County, IAIA3,617264+29%

99▼2Audubon County, IAIA5,509248−28%

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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