RANKING · 2020 CENSUS · 98 SHOWN OF 98

Highest Czech population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Czech ancestry (2023 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 98 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

RANKPLACESTATEPOPCZECH SHAREVS 2000

01Howard County, IAIA9,41511.7%–

02Tama County, IAIA16,7969.5%–

03Winneshiek County, IAIA19,7337.3%–

04Linn County, IAIA232,0285.1%–

05Benton County, IAIA26,0045.0%–

06Johnson County, IAIA160,0443.6%–

07Hancock County, IAIA10,5283.5%–

08Chickasaw County, IAIA11,6633.2%–

09Iowa County, IAIA16,5043.1%–

10Ringgold County, IAIA4,6422.5%–

11Jones County, IAIA21,2532.4%–

12Poweshiek County, IAIA18,3682.3%–

13Allamakee County, IAIA14,2382.3%–

14Cedar County, IAIA18,3592.3%–

15Pocahontas County, IAIA6,8192.3%–

16Delaware County, IAIA17,6742.1%–

17Floyd County, IAIA14,9012.0%–

18Marshall County, IAIA39,8901.9%–

19Mills County, IAIA14,7931.9%–

20Cerro Gordo County, IAIA42,3721.8%–

21Adams County, IAIA3,6171.8%–

22Cass County, IAIA12,9601.7%–

23Fayette County, IAIA19,0471.6%–

24Webster County, IAIA36,8381.5%–

25Black Hawk County, IAIA131,5321.5%–

26Pottawattamie County, IAIA92,9961.5%–

27Bremer County, IAIA25,2961.4%–

28Keokuk County, IAIA9,7971.4%–

29Worth County, IAIA7,3381.3%–

30Buchanan County, IAIA20,8831.3%–

31Emmet County, IAIA9,1071.2%–

32Cherokee County, IAIA11,3691.2%–

33Union County, IAIA11,8291.2%–

34Warren County, IAIA57,3311.2%–

35Buena Vista County, IAIA20,4491.2%–

36Muscatine County, IAIA41,8531.2%–

37Clayton County, IAIA16,8451.1%–

38Winnebago County, IAIA10,2511.1%–

39Hardin County, IAIA16,4551.1%–

40Grundy County, IAIA12,3611.1%–

41Harrison County, IAIA14,6231.1%–

42Washington County, IAIA22,6671.1%–

43Monroe County, IAIA7,4061.1%–

44Monona County, IAIA8,5391.0%–

45Polk County, IAIA516,5461.0%–

46Mitchell County, IAIA10,6501.0%–

47Madison County, IAIA17,2701.0%–

48Crawford County, IAIA16,2371.0%–

49Carroll County, IAIA20,3030.9%–

50Dallas County, IAIA118,4570.9%–

51Woodbury County, IAIA106,6490.9%–

52Story County, IAIA101,2910.9%–

53Appanoose County, IAIA12,0770.9%–

54Clinton County, IAIA46,0020.9%–

55Scott County, IAIA175,2590.9%–

56Butler County, IAIA14,0490.8%–

57Page County, IAIA14,8560.8%–

58Shelby County, IAIA11,6890.8%–

59Wright County, IAIA12,8010.8%–

60Dubuque County, IAIA99,3810.8%–

61Sioux County, IAIA36,7740.8%–

62Lucas County, IAIA8,8470.8%–

63Mahaska County, IAIA21,8800.7%–

64Clarke County, IAIA9,5740.7%–

65Guthrie County, IAIA10,7820.7%–

66Dickinson County, IAIA18,0770.7%–

67Franklin County, IAIA9,8680.7%–

68Des Moines County, IAIA38,0770.7%–

69Humboldt County, IAIA9,4090.7%–

70Audubon County, IAIA5,5090.7%–

71Plymouth County, IAIA25,6970.7%–

72Henry County, IAIA19,3490.6%–

73Clay County, IAIA16,2020.6%–

74Louisa County, IAIA10,4160.6%–

75Boone County, IAIA26,7990.6%–

76Calhoun County, IAIA9,5620.6%–

77Jackson County, IAIA19,2880.6%–

78Jasper County, IAIA38,1530.6%–

79Fremont County, IAIA6,5220.6%–

80Marion County, IAIA34,1920.5%–

81Decatur County, IAIA7,6550.5%–

82Lyon County, IAIA12,3540.4%–

83Montgomery County, IAIA10,0020.4%–

84Jefferson County, IAIA15,2910.4%–

85Hamilton County, IAIA14,9440.4%–

86Van Buren County, IAIA7,1310.4%–

87Sac County, IAIA9,5250.4%–

88Taylor County, IAIA5,8350.3%–

89Kossuth County, IAIA14,3220.3%–

90Adair County, IAIA7,4030.3%–

91Ida County, IAIA6,7770.3%–

92O'Brien County, IAIA14,2200.3%–

93Palo Alto County, IAIA8,8990.2%–

94Greene County, IAIA8,6580.2%–

95Lee County, IAIA32,3060.2%–

96Wapello County, IAIA35,2100.2%–

97Wayne County, IAIA6,7380.1%–

98Osceola County, IAIA5,9800.1%–

SHOWING 1–98 OF 98

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