RANKING · 2010 CENSUS · 99 SHOWN OF 99

Most foreign-born residents, Iowa counties · 2010

Iowa counties ranked by the share of residents born outside the US (2023 ACS). This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDOldest by median age Youngest by median age Highest uninsured rate Most women Most men Highest disability rate

YEAR2010 2020 2024

RANKPLACESTATEPOPFOREIGN-BORNVS 2000

01Buena Vista County, IAIA20,44915.3%–

02Jefferson County, IAIA15,29112.4%–

03Crawford County, IAIA16,23712.3%–

04Marshall County, IAIA39,8909.6%–

05Johnson County, IAIA160,0448.2%–

06Story County, IAIA101,2918.1%–

07Woodbury County, IAIA106,6498.0%–

08Polk County, IAIA516,5467.8%–

09Muscatine County, IAIA41,8537.5%–

10Louisa County, IAIA10,4167.4%–

11Dallas County, IAIA118,4576.4%–

12Sioux County, IAIA36,7745.9%–

13Wapello County, IAIA35,2105.5%–

14Franklin County, IAIA9,8685.3%–

15Clarke County, IAIA9,5745.2%–

16Allamakee County, IAIA14,2384.9%–

17Henry County, IAIA19,3494.8%–

18Black Hawk County, IAIA131,5324.4%–

19Wright County, IAIA12,8014.3%–

20Emmet County, IAIA9,1073.7%–

21Scott County, IAIA175,2593.5%–

22Pottawattamie County, IAIA92,9963.4%–

23Tama County, IAIA16,7963.3%–

24Lucas County, IAIA8,8473.1%–

25Winnebago County, IAIA10,2513.1%–

26Linn County, IAIA232,0282.9%–

27Wayne County, IAIA6,7382.8%–

28Washington County, IAIA22,6672.8%–

29Osceola County, IAIA5,9802.8%–

30Decatur County, IAIA7,6552.7%–

31Taylor County, IAIA5,8352.4%–

32Poweshiek County, IAIA18,3682.3%–

33Hamilton County, IAIA14,9442.2%–

34Cerro Gordo County, IAIA42,3722.2%–

35O'Brien County, IAIA14,2202.2%–

36Webster County, IAIA36,8382.1%–

37Clay County, IAIA16,2022.0%–

38Page County, IAIA14,8562.0%–

39Montgomery County, IAIA10,0022.0%–

40Des Moines County, IAIA38,0772.0%–

41Winneshiek County, IAIA19,7332.0%–

42Sac County, IAIA9,5251.9%–

43Hardin County, IAIA16,4551.8%–

44Floyd County, IAIA14,9011.8%–

45Ringgold County, IAIA4,6421.8%–

46Dubuque County, IAIA99,3811.7%–

47Mills County, IAIA14,7931.7%–

48Clayton County, IAIA16,8451.7%–

49Marion County, IAIA34,1921.6%–

50Chickasaw County, IAIA11,6631.6%–

51Humboldt County, IAIA9,4091.6%–

52Monroe County, IAIA7,4061.5%–

53Hancock County, IAIA10,5281.5%–

54Lee County, IAIA32,3061.4%–

55Mahaska County, IAIA21,8801.4%–

56Greene County, IAIA8,6581.4%–

57Bremer County, IAIA25,2961.3%–

58Plymouth County, IAIA25,6971.3%–

59Cedar County, IAIA18,3591.2%–

60Pocahontas County, IAIA6,8191.2%–

61Cass County, IAIA12,9601.2%–

62Clinton County, IAIA46,0021.2%–

63Cherokee County, IAIA11,3691.2%–

64Fayette County, IAIA19,0471.2%–

65Warren County, IAIA57,3311.1%–

66Fremont County, IAIA6,5221.1%–

67Guthrie County, IAIA10,7821.1%–

68Dickinson County, IAIA18,0771.1%–

69Van Buren County, IAIA7,1311.1%–

70Mitchell County, IAIA10,6501.0%–

71Jasper County, IAIA38,1531.0%–

72Monona County, IAIA8,5391.0%–

73Benton County, IAIA26,0041.0%–

74Howard County, IAIA9,4151.0%–

75Harrison County, IAIA14,6230.9%–

76Butler County, IAIA14,0490.9%–

77Jones County, IAIA21,2530.9%–

78Keokuk County, IAIA9,7970.8%–

79Boone County, IAIA26,7990.8%–

80Buchanan County, IAIA20,8830.8%–

81Worth County, IAIA7,3380.7%–

82Lyon County, IAIA12,3540.7%–

83Calhoun County, IAIA9,5620.7%–

84Ida County, IAIA6,7770.7%–

85Kossuth County, IAIA14,3220.7%–

86Appanoose County, IAIA12,0770.7%–

87Audubon County, IAIA5,5090.6%–

88Madison County, IAIA17,2700.6%–

89Palo Alto County, IAIA8,8990.6%–

90Carroll County, IAIA20,3030.6%–

91Jackson County, IAIA19,2880.6%–

92Iowa County, IAIA16,5040.6%–

93Davis County, IAIA9,2300.6%–

94Union County, IAIA11,8290.5%–

95Adair County, IAIA7,4030.5%–

96Shelby County, IAIA11,6890.5%–

97Grundy County, IAIA12,3610.4%–

98Delaware County, IAIA17,6740.4%–

99Adams County, IAIA3,6170.3%–

SHOWING 1–99 OF 99

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES