RANKING · 2010 CENSUS · 97 SHOWN OF 97

Highest Swiss population share, Iowa counties · 2010

Iowa counties ranked by the share of all residents who are Swiss ancestry (2010 American Community Survey). A concentration measure: Swiss residents as a percentage of total population. This list covers the 97 counties in Iowa that qualify, ranked against each other statewide. The median across all 97 is 0.4%.

Swiss Americans: full group profile →

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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

RANKPLACESTATEPOPSWISS SHAREVS –

01Lyon County, IAIA12,3543.6%–

02Washington County, IAIA22,6672.5%–

03Palo Alto County, IAIA8,8992.4%–

04Fayette County, IAIA19,0472.1%–

05Clayton County, IAIA16,8452.1%–

06Davis County, IAIA9,2302.1%–

07Allamakee County, IAIA14,2381.9%–

08Iowa County, IAIA16,5041.4%–

09Howard County, IAIA9,4151.4%–

10Decatur County, IAIA7,6551.3%–

11Van Buren County, IAIA7,1311.2%–

12Jones County, IAIA21,2531.1%–

13Mitchell County, IAIA10,6501.0%–

14Dubuque County, IAIA99,3810.9%–

15Chickasaw County, IAIA11,6630.9%–

16Dickinson County, IAIA18,0770.9%–

17Kossuth County, IAIA14,3220.9%–

18Appanoose County, IAIA12,0770.8%–

19Lucas County, IAIA8,8470.7%–

20Dallas County, IAIA118,4570.7%–

21Story County, IAIA101,2910.7%–

22Linn County, IAIA232,0280.7%–

23Adams County, IAIA3,6170.7%–

24Delaware County, IAIA17,6740.7%–

25Johnson County, IAIA160,0440.7%–

26Henry County, IAIA19,3490.6%–

27Cherokee County, IAIA11,3690.6%–

28Boone County, IAIA26,7990.6%–

29Osceola County, IAIA5,9800.6%–

30Pocahontas County, IAIA6,8190.6%–

31Taylor County, IAIA5,8350.6%–

32Scott County, IAIA175,2590.6%–

33Buchanan County, IAIA20,8830.5%–

34Cerro Gordo County, IAIA42,3720.5%–

35Guthrie County, IAIA10,7820.5%–

36Cedar County, IAIA18,3590.5%–

37Hamilton County, IAIA14,9440.5%–

38Pottawattamie County, IAIA92,9960.5%–

39Carroll County, IAIA20,3030.5%–

40Winneshiek County, IAIA19,7330.5%–

41Floyd County, IAIA14,9010.5%–

42Des Moines County, IAIA38,0770.5%–

43Hardin County, IAIA16,4550.5%–

44Benton County, IAIA26,0040.5%–

45Plymouth County, IAIA25,6970.4%–

46Keokuk County, IAIA9,7970.4%–

47Harrison County, IAIA14,6230.4%–

48Clay County, IAIA16,2020.4%–

49Greene County, IAIA8,6580.4%–

50Jefferson County, IAIA15,2910.4%–

51Louisa County, IAIA10,4160.4%–

52Marshall County, IAIA39,8900.4%–

53Monona County, IAIA8,5390.4%–

54Mills County, IAIA14,7930.4%–

55Black Hawk County, IAIA131,5320.4%–

56Bremer County, IAIA25,2960.4%–

57Montgomery County, IAIA10,0020.4%–

58Jackson County, IAIA19,2880.4%–

59Winnebago County, IAIA10,2510.4%–

60Calhoun County, IAIA9,5620.4%–

61Jasper County, IAIA38,1530.3%–

62Wayne County, IAIA6,7380.3%–

63Union County, IAIA11,8290.3%–

64Humboldt County, IAIA9,4090.3%–

65Ida County, IAIA6,7770.3%–

66Woodbury County, IAIA106,6490.3%–

67Polk County, IAIA516,5460.3%–

68Sac County, IAIA9,5250.3%–

69Poweshiek County, IAIA18,3680.3%–

70Clinton County, IAIA46,0020.3%–

71Adair County, IAIA7,4030.3%–

72Warren County, IAIA57,3310.3%–

73Worth County, IAIA7,3380.3%–

74Mahaska County, IAIA21,8800.3%–

75Cass County, IAIA12,9600.3%–

76Audubon County, IAIA5,5090.3%–

77Webster County, IAIA36,8380.3%–

78Page County, IAIA14,8560.3%–

79Shelby County, IAIA11,6890.3%–

80Muscatine County, IAIA41,8530.2%–

81Butler County, IAIA14,0490.2%–

82Buena Vista County, IAIA20,4490.2%–

83Clarke County, IAIA9,5740.2%–

84Grundy County, IAIA12,3610.2%–

85Madison County, IAIA17,2700.2%–

86Ringgold County, IAIA4,6420.2%–

87Sioux County, IAIA36,7740.2%–

88Crawford County, IAIA16,2370.2%–

89Hancock County, IAIA10,5280.1%–

90Wright County, IAIA12,8010.1%–

91Emmet County, IAIA9,1070.1%–

92Tama County, IAIA16,7960.1%–

93Fremont County, IAIA6,5220.1%–

94Lee County, IAIA32,3060.1%–

95Wapello County, IAIA35,2100.1%–

96O'Brien County, IAIA14,2200.0%–

97Marion County, IAIA34,1920.0%–

SHOWING 1–97 OF 97

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS