RANKING · 2020 CENSUS · 98 SHOWN OF 98

Highest Swiss population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Swiss ancestry (2023 American Community Survey). A concentration measure: Swiss 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

RANKPLACESTATEPOPSWISS SHAREVS 2000

01Howard County, IAIA9,4154.3%–

02Davis County, IAIA9,2302.7%–

03Washington County, IAIA22,6672.3%–

04Fayette County, IAIA19,0472.0%–

05Van Buren County, IAIA7,1311.8%–

06Jones County, IAIA21,2531.8%–

07Lyon County, IAIA12,3541.7%–

08Clayton County, IAIA16,8451.4%–

09Taylor County, IAIA5,8351.3%–

10Floyd County, IAIA14,9011.2%–

11Jackson County, IAIA19,2881.0%–

12Keokuk County, IAIA9,7971.0%–

13Henry County, IAIA19,3491.0%–

14Ida County, IAIA6,7771.0%–

15Mitchell County, IAIA10,6500.9%–

16Allamakee County, IAIA14,2380.9%–

17Johnson County, IAIA160,0440.9%–

18Union County, IAIA11,8290.9%–

19Dubuque County, IAIA99,3810.9%–

20Palo Alto County, IAIA8,8990.8%–

21Hancock County, IAIA10,5280.8%–

22Iowa County, IAIA16,5040.8%–

23Humboldt County, IAIA9,4090.7%–

24Dallas County, IAIA118,4570.7%–

25Marion County, IAIA34,1920.7%–

26Black Hawk County, IAIA131,5320.6%–

27Des Moines County, IAIA38,0770.6%–

28Sioux County, IAIA36,7740.6%–

29Kossuth County, IAIA14,3220.6%–

30Benton County, IAIA26,0040.6%–

31Butler County, IAIA14,0490.6%–

32Wright County, IAIA12,8010.5%–

33Buchanan County, IAIA20,8830.5%–

34Tama County, IAIA16,7960.5%–

35Story County, IAIA101,2910.5%–

36Chickasaw County, IAIA11,6630.5%–

37Sac County, IAIA9,5250.5%–

38Linn County, IAIA232,0280.5%–

39Montgomery County, IAIA10,0020.4%–

40Louisa County, IAIA10,4160.4%–

41Hamilton County, IAIA14,9440.4%–

42Delaware County, IAIA17,6740.4%–

43Cherokee County, IAIA11,3690.4%–

44Wayne County, IAIA6,7380.4%–

45Jasper County, IAIA38,1530.4%–

46Crawford County, IAIA16,2370.4%–

47O'Brien County, IAIA14,2200.4%–

48Grundy County, IAIA12,3610.4%–

49Winneshiek County, IAIA19,7330.4%–

50Scott County, IAIA175,2590.4%–

51Jefferson County, IAIA15,2910.3%–

52Clay County, IAIA16,2020.3%–

53Warren County, IAIA57,3310.3%–

54Poweshiek County, IAIA18,3680.3%–

55Decatur County, IAIA7,6550.3%–

56Wapello County, IAIA35,2100.3%–

57Mills County, IAIA14,7930.3%–

58Buena Vista County, IAIA20,4490.3%–

59Clarke County, IAIA9,5740.3%–

60Fremont County, IAIA6,5220.3%–

61Polk County, IAIA516,5460.3%–

62Cedar County, IAIA18,3590.3%–

63Boone County, IAIA26,7990.3%–

64Clinton County, IAIA46,0020.2%–

65Adams County, IAIA3,6170.2%–

66Plymouth County, IAIA25,6970.2%–

67Muscatine County, IAIA41,8530.2%–

68Worth County, IAIA7,3380.2%–

69Hardin County, IAIA16,4550.2%–

70Adair County, IAIA7,4030.2%–

71Pocahontas County, IAIA6,8190.2%–

72Webster County, IAIA36,8380.2%–

73Guthrie County, IAIA10,7820.2%–

74Cerro Gordo County, IAIA42,3720.2%–

75Greene County, IAIA8,6580.2%–

76Carroll County, IAIA20,3030.2%–

77Monroe County, IAIA7,4060.2%–

78Mahaska County, IAIA21,8800.2%–

79Marshall County, IAIA39,8900.2%–

80Cass County, IAIA12,9600.2%–

81Harrison County, IAIA14,6230.2%–

82Woodbury County, IAIA106,6490.2%–

83Shelby County, IAIA11,6890.2%–

84Bremer County, IAIA25,2960.2%–

85Page County, IAIA14,8560.2%–

86Audubon County, IAIA5,5090.1%–

87Pottawattamie County, IAIA92,9960.1%–

88Franklin County, IAIA9,8680.1%–

89Appanoose County, IAIA12,0770.1%–

90Monona County, IAIA8,5390.1%–

91Calhoun County, IAIA9,5620.1%–

92Dickinson County, IAIA18,0770.1%–

93Madison County, IAIA17,2700.1%–

94Lee County, IAIA32,3060.1%–

95Emmet County, IAIA9,1070.1%–

96Osceola County, IAIA5,9800.0%–

97Lucas County, IAIA8,8470.0%–

98Winnebago County, IAIA10,2510.0%–

SHOWING 1–98 OF 98

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