RANKING · 2010 CENSUS · 99 SHOWN OF 99

Largest foreign-born population, Iowa counties · 2010

Iowa counties with the most residents born outside the United States, as of the 2010 American Community Survey. Ranked by number of people, not share. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPFOREIGN-BORN POPULATIONVS –

01Polk County, IAIA516,54633,757–

02Johnson County, IAIA160,04410,791–

03Woodbury County, IAIA106,6498,132–

04Story County, IAIA101,2917,218–

05Linn County, IAIA232,0286,097–

06Black Hawk County, IAIA131,5325,807–

07Scott County, IAIA175,2595,787–

08Dallas County, IAIA118,4574,245–

09Marshall County, IAIA39,8903,920–

10Muscatine County, IAIA41,8533,209–

11Pottawattamie County, IAIA92,9963,140–

12Buena Vista County, IAIA20,4493,093–

13Crawford County, IAIA16,2372,096–

14Jefferson County, IAIA15,2912,082–

15Sioux County, IAIA36,7741,996–

16Wapello County, IAIA35,2101,977–

17Dubuque County, IAIA99,3811,583–

18Cerro Gordo County, IAIA42,372982–

19Henry County, IAIA19,349964–

20Louisa County, IAIA10,416840–

21Webster County, IAIA36,838811–

22Des Moines County, IAIA38,077791–

23Allamakee County, IAIA14,238705–

24Washington County, IAIA22,667602–

25Tama County, IAIA16,796593–

26Clinton County, IAIA46,002590–

27Franklin County, IAIA9,868571–

28Wright County, IAIA12,801567–

29Marion County, IAIA34,192542–

30Warren County, IAIA57,331524–

31Lee County, IAIA32,306518–

32Clarke County, IAIA9,574484–

33Poweshiek County, IAIA18,368433–

34Winneshiek County, IAIA19,733412–

35Jasper County, IAIA38,153381–

36Emmet County, IAIA9,107377–

37Hamilton County, IAIA14,944352–

38Clay County, IAIA16,202337–

39Winnebago County, IAIA10,251334–

40Plymouth County, IAIA25,697322–

41Bremer County, IAIA25,296321–

42Hardin County, IAIA16,455321–

43Mahaska County, IAIA21,880320–

44Page County, IAIA14,856318–

45O'Brien County, IAIA14,220315–

46Clayton County, IAIA16,845306–

47Floyd County, IAIA14,901292–

48Lucas County, IAIA8,847276–

49Mills County, IAIA14,793254–

50Benton County, IAIA26,004253–

51Fayette County, IAIA19,047242–

52Cedar County, IAIA18,359229–

53Decatur County, IAIA7,655226–

54Boone County, IAIA26,799215–

55Montgomery County, IAIA10,002214–

56Chickasaw County, IAIA11,663200–

57Sac County, IAIA9,525194–

58Dickinson County, IAIA18,077181–

59Wayne County, IAIA6,738181–

60Jones County, IAIA21,253179–

61Osceola County, IAIA5,980179–

62Cass County, IAIA12,960169–

63Buchanan County, IAIA20,883167–

64Hancock County, IAIA10,528165–

65Humboldt County, IAIA9,409155–

66Taylor County, IAIA5,835150–

67Cherokee County, IAIA11,369140–

68Harrison County, IAIA14,623136–

69Butler County, IAIA14,049134–

70Carroll County, IAIA20,303131–

71Greene County, IAIA8,658128–

72Jackson County, IAIA19,288122–

73Monroe County, IAIA7,406122–

74Guthrie County, IAIA10,782119–

75Mitchell County, IAIA10,650112–

76Kossuth County, IAIA14,322102–

77Madison County, IAIA17,270101–

78Iowa County, IAIA16,50499–

79Howard County, IAIA9,41592–

80Monona County, IAIA8,53990–

81Pocahontas County, IAIA6,81990–

82Ringgold County, IAIA4,64290–

83Keokuk County, IAIA9,79786–

84Appanoose County, IAIA12,07784–

85Fremont County, IAIA6,52282–

86Van Buren County, IAIA7,13181–

87Lyon County, IAIA12,35480–

88Delaware County, IAIA17,67470–

89Calhoun County, IAIA9,56267–

90Union County, IAIA11,82966–

91Shelby County, IAIA11,68960–

92Palo Alto County, IAIA8,89959–

93Grundy County, IAIA12,36154–

94Worth County, IAIA7,33854–

95Davis County, IAIA9,23052–

96Ida County, IAIA6,77747–

97Audubon County, IAIA5,50940–

98Adair County, IAIA7,40339–

99Adams County, IAIA3,61714–

SHOWING 1–99 OF 99

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS