RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Polish population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Polish ancestry (2023 American Community Survey). A concentration measure: Polish residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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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

RANKPLACESTATEPOPPOLISH SHAREVS 2000

01Jackson County, IAIA19,2882.6%–

02Adams County, IAIA3,6172.5%–

03Decatur County, IAIA7,6552.1%–

04Johnson County, IAIA160,0442.1%–

05Plymouth County, IAIA25,6971.9%–

06Pottawattamie County, IAIA92,9961.9%–

07Scott County, IAIA175,2591.9%–

08Dallas County, IAIA118,4571.8%–

09Humboldt County, IAIA9,4091.8%–

10Woodbury County, IAIA106,6491.7%–

11Ringgold County, IAIA4,6421.7%–

12Howard County, IAIA9,4151.7%–

13Iowa County, IAIA16,5041.6%–

14Story County, IAIA101,2911.6%–

15Muscatine County, IAIA41,8531.6%–

16Harrison County, IAIA14,6231.6%–

17Clarke County, IAIA9,5741.6%–

18Jefferson County, IAIA15,2911.5%–

19Lucas County, IAIA8,8471.5%–

20Union County, IAIA11,8291.4%–

21Buchanan County, IAIA20,8831.4%–

22Bremer County, IAIA25,2961.3%–

23Polk County, IAIA516,5461.3%–

24Linn County, IAIA232,0281.3%–

25Davis County, IAIA9,2301.3%–

26Van Buren County, IAIA7,1311.3%–

27Dickinson County, IAIA18,0771.3%–

28Warren County, IAIA57,3311.3%–

29Cedar County, IAIA18,3591.3%–

30Dubuque County, IAIA99,3811.3%–

31Pocahontas County, IAIA6,8191.2%–

32Shelby County, IAIA11,6891.2%–

33Cherokee County, IAIA11,3691.2%–

34Lee County, IAIA32,3061.2%–

35Sioux County, IAIA36,7741.2%–

36Page County, IAIA14,8561.2%–

37Ida County, IAIA6,7771.1%–

38Winnebago County, IAIA10,2511.1%–

39Kossuth County, IAIA14,3221.1%–

40Calhoun County, IAIA9,5621.1%–

41Clinton County, IAIA46,0021.0%–

42Mills County, IAIA14,7931.0%–

43Hancock County, IAIA10,5281.0%–

44Webster County, IAIA36,8381.0%–

45Clayton County, IAIA16,8451.0%–

46Poweshiek County, IAIA18,3681.0%–

47Tama County, IAIA16,7961.0%–

48Jasper County, IAIA38,1531.0%–

49Monona County, IAIA8,5390.9%–

50Cerro Gordo County, IAIA42,3720.9%–

51Louisa County, IAIA10,4160.9%–

52Boone County, IAIA26,7990.9%–

53Osceola County, IAIA5,9800.9%–

54Floyd County, IAIA14,9010.9%–

55Benton County, IAIA26,0040.9%–

56Marshall County, IAIA39,8900.9%–

57Black Hawk County, IAIA131,5320.9%–

58Keokuk County, IAIA9,7970.9%–

59Mahaska County, IAIA21,8800.9%–

60Washington County, IAIA22,6670.9%–

61Henry County, IAIA19,3490.8%–

62Worth County, IAIA7,3380.8%–

63Winneshiek County, IAIA19,7330.8%–

64Fremont County, IAIA6,5220.8%–

65Chickasaw County, IAIA11,6630.8%–

66Marion County, IAIA34,1920.8%–

67Adair County, IAIA7,4030.8%–

68Palo Alto County, IAIA8,8990.8%–

69Lyon County, IAIA12,3540.8%–

70Emmet County, IAIA9,1070.8%–

71Monroe County, IAIA7,4060.8%–

72Madison County, IAIA17,2700.8%–

73Cass County, IAIA12,9600.7%–

74Guthrie County, IAIA10,7820.7%–

75Wayne County, IAIA6,7380.7%–

76Montgomery County, IAIA10,0020.7%–

77Crawford County, IAIA16,2370.7%–

78Appanoose County, IAIA12,0770.7%–

79Des Moines County, IAIA38,0770.7%–

80Grundy County, IAIA12,3610.7%–

81Carroll County, IAIA20,3030.7%–

82Delaware County, IAIA17,6740.6%–

83Butler County, IAIA14,0490.6%–

84Franklin County, IAIA9,8680.6%–

85Sac County, IAIA9,5250.6%–

86Mitchell County, IAIA10,6500.5%–

87Greene County, IAIA8,6580.5%–

88Jones County, IAIA21,2530.5%–

89Clay County, IAIA16,2020.5%–

90Fayette County, IAIA19,0470.5%–

91Audubon County, IAIA5,5090.5%–

92Wright County, IAIA12,8010.5%–

93Buena Vista County, IAIA20,4490.4%–

94Hardin County, IAIA16,4550.4%–

95Allamakee County, IAIA14,2380.4%–

96Hamilton County, IAIA14,9440.4%–

97O'Brien County, IAIA14,2200.3%–

98Wapello County, IAIA35,2100.3%–

99Taylor County, IAIA5,8350.2%–

SHOWING 1–99 OF 99

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