RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Dutch population share, Iowa counties · 2020

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

IowaAll states All rankings

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

RANKPLACESTATEPOPDUTCH SHAREVS 2000

01Sioux County, IAIA36,77445.0%–

02Lyon County, IAIA12,35434.4%–

03O'Brien County, IAIA14,22023.9%–

04Marion County, IAIA34,19218.9%–

05Osceola County, IAIA5,98015.8%–

06Mahaska County, IAIA21,88015.8%–

07Jasper County, IAIA38,15313.2%–

08Poweshiek County, IAIA18,3687.9%–

09Davis County, IAIA9,2307.6%–

10Monroe County, IAIA7,4066.8%–

11Dickinson County, IAIA18,0776.3%–

12Plymouth County, IAIA25,6976.1%–

13Clarke County, IAIA9,5745.2%–

14Cherokee County, IAIA11,3694.5%–

15Grundy County, IAIA12,3614.4%–

16Wayne County, IAIA6,7384.2%–

17Keokuk County, IAIA9,7974.2%–

18Boone County, IAIA26,7994.0%–

19Winnebago County, IAIA10,2514.0%–

20Warren County, IAIA57,3313.9%–

21Sac County, IAIA9,5253.8%–

22Hancock County, IAIA10,5283.8%–

23Greene County, IAIA8,6583.8%–

24Woodbury County, IAIA106,6493.8%–

25Wapello County, IAIA35,2103.7%–

26Lucas County, IAIA8,8473.7%–

27Clinton County, IAIA46,0023.6%–

28Butler County, IAIA14,0493.6%–

29Union County, IAIA11,8293.5%–

30Iowa County, IAIA16,5043.5%–

31Story County, IAIA101,2913.1%–

32Polk County, IAIA516,5463.1%–

33Mills County, IAIA14,7933.0%–

34Ida County, IAIA6,7773.0%–

35Van Buren County, IAIA7,1313.0%–

36Emmet County, IAIA9,1072.9%–

37Adams County, IAIA3,6172.9%–

38Washington County, IAIA22,6672.9%–

39Clay County, IAIA16,2022.9%–

40Jefferson County, IAIA15,2912.9%–

41Dallas County, IAIA118,4572.8%–

42Henry County, IAIA19,3492.8%–

43Des Moines County, IAIA38,0772.8%–

44Monona County, IAIA8,5392.8%–

45Appanoose County, IAIA12,0772.7%–

46Hamilton County, IAIA14,9442.7%–

47Floyd County, IAIA14,9012.7%–

48Cerro Gordo County, IAIA42,3722.6%–

49Guthrie County, IAIA10,7822.6%–

50Madison County, IAIA17,2702.6%–

51Cass County, IAIA12,9602.6%–

52Ringgold County, IAIA4,6422.5%–

53Mitchell County, IAIA10,6502.4%–

54Franklin County, IAIA9,8682.4%–

55Palo Alto County, IAIA8,8992.4%–

56Marshall County, IAIA39,8902.3%–

57Hardin County, IAIA16,4552.3%–

58Decatur County, IAIA7,6552.2%–

59Taylor County, IAIA5,8352.2%–

60Jones County, IAIA21,2532.2%–

61Montgomery County, IAIA10,0022.2%–

62Buena Vista County, IAIA20,4492.2%–

63Johnson County, IAIA160,0442.2%–

64Howard County, IAIA9,4152.1%–

65Harrison County, IAIA14,6232.1%–

66Calhoun County, IAIA9,5622.1%–

67Benton County, IAIA26,0042.1%–

68Muscatine County, IAIA41,8532.1%–

69Buchanan County, IAIA20,8832.1%–

70Black Hawk County, IAIA131,5322.0%–

71Fremont County, IAIA6,5222.0%–

72Wright County, IAIA12,8012.0%–

73Bremer County, IAIA25,2962.0%–

74Kossuth County, IAIA14,3222.0%–

75Pocahontas County, IAIA6,8192.0%–

76Cedar County, IAIA18,3591.9%–

77Adair County, IAIA7,4031.9%–

78Linn County, IAIA232,0281.9%–

79Page County, IAIA14,8561.8%–

80Webster County, IAIA36,8381.8%–

81Scott County, IAIA175,2591.8%–

82Pottawattamie County, IAIA92,9961.8%–

83Chickasaw County, IAIA11,6631.8%–

84Worth County, IAIA7,3381.8%–

85Fayette County, IAIA19,0471.7%–

86Crawford County, IAIA16,2371.7%–

87Louisa County, IAIA10,4161.7%–

88Tama County, IAIA16,7961.6%–

89Delaware County, IAIA17,6741.5%–

90Dubuque County, IAIA99,3811.5%–

91Audubon County, IAIA5,5091.4%–

92Jackson County, IAIA19,2881.4%–

93Lee County, IAIA32,3061.3%–

94Carroll County, IAIA20,3031.3%–

95Humboldt County, IAIA9,4091.3%–

96Winneshiek County, IAIA19,7331.2%–

97Shelby County, IAIA11,6891.0%–

98Allamakee County, IAIA14,2380.9%–

99Clayton County, IAIA16,8450.9%–

SHOWING 1–99 OF 99

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