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 (2020 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. The median across all 98 is 0.4%.

Swiss Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSWISS SHAREVS 2010

01Howard County, IAIA9,4154.3%+2.9 pts

02Davis County, IAIA9,2302.7%+0.6 pts

03Washington County, IAIA22,6672.3%−0.1 pts

04Fayette County, IAIA19,0472.0%−0.1 pts

05Van Buren County, IAIA7,1311.8%+0.7 pts

06Jones County, IAIA21,2531.8%+0.6 pts

07Lyon County, IAIA12,3541.7%−1.9 pts

08Clayton County, IAIA16,8451.4%−0.7 pts

09Taylor County, IAIA5,8351.3%+0.7 pts

10Floyd County, IAIA14,9011.2%+0.7 pts

11Jackson County, IAIA19,2881.0%+0.7 pts

12Keokuk County, IAIA9,7971.0%+0.6 pts

13Henry County, IAIA19,3491.0%+0.4 pts

14Ida County, IAIA6,7771.0%+0.7 pts

15Mitchell County, IAIA10,6500.9%−0.1 pts

16Allamakee County, IAIA14,2380.9%−1.0 pts

17Johnson County, IAIA160,0440.9%+0.2 pts

18Union County, IAIA11,8290.9%+0.5 pts

19Dubuque County, IAIA99,3810.9%−0.1 pts

20Palo Alto County, IAIA8,8990.8%−1.6 pts

21Hancock County, IAIA10,5280.8%+0.7 pts

22Iowa County, IAIA16,5040.8%−0.6 pts

23Humboldt County, IAIA9,4090.7%+0.4 pts

24Dallas County, IAIA118,4570.7%0.0 pts

25Marion County, IAIA34,1920.7%+0.7 pts

26Black Hawk County, IAIA131,5320.6%+0.3 pts

27Des Moines County, IAIA38,0770.6%+0.1 pts

28Sioux County, IAIA36,7740.6%+0.4 pts

29Kossuth County, IAIA14,3220.6%−0.3 pts

30Benton County, IAIA26,0040.6%+0.1 pts

31Butler County, IAIA14,0490.6%+0.3 pts

32Wright County, IAIA12,8010.5%+0.4 pts

33Buchanan County, IAIA20,8830.5%0.0 pts

34Tama County, IAIA16,7960.5%+0.4 pts

35Story County, IAIA101,2910.5%−0.2 pts

36Chickasaw County, IAIA11,6630.5%−0.4 pts

37Sac County, IAIA9,5250.5%+0.2 pts

38Linn County, IAIA232,0280.5%−0.3 pts

39Montgomery County, IAIA10,0020.4%+0.1 pts

40Louisa County, IAIA10,4160.4%0.0 pts

41Hamilton County, IAIA14,9440.4%−0.1 pts

42Delaware County, IAIA17,6740.4%−0.3 pts

43Cherokee County, IAIA11,3690.4%−0.2 pts

44Wayne County, IAIA6,7380.4%0.0 pts

45Jasper County, IAIA38,1530.4%0.0 pts

46Crawford County, IAIA16,2370.4%+0.2 pts

47O'Brien County, IAIA14,2200.4%+0.3 pts

48Grundy County, IAIA12,3610.4%+0.2 pts

49Winneshiek County, IAIA19,7330.4%−0.1 pts

50Scott County, IAIA175,2590.4%−0.2 pts

51Jefferson County, IAIA15,2910.3%−0.1 pts

52Clay County, IAIA16,2020.3%−0.1 pts

53Warren County, IAIA57,3310.3%0.0 pts

54Poweshiek County, IAIA18,3680.3%0.0 pts

55Decatur County, IAIA7,6550.3%−1.0 pts

56Wapello County, IAIA35,2100.3%+0.3 pts

57Mills County, IAIA14,7930.3%−0.1 pts

58Buena Vista County, IAIA20,4490.3%+0.1 pts

59Clarke County, IAIA9,5740.3%+0.1 pts

60Fremont County, IAIA6,5220.3%+0.2 pts

61Polk County, IAIA516,5460.3%0.0 pts

62Cedar County, IAIA18,3590.3%−0.2 pts

63Boone County, IAIA26,7990.3%−0.3 pts

64Clinton County, IAIA46,0020.2%−0.1 pts

65Adams County, IAIA3,6170.2%−0.5 pts

66Plymouth County, IAIA25,6970.2%−0.2 pts

67Muscatine County, IAIA41,8530.2%0.0 pts

68Worth County, IAIA7,3380.2%0.0 pts

69Hardin County, IAIA16,4550.2%−0.2 pts

70Adair County, IAIA7,4030.2%−0.1 pts

71Pocahontas County, IAIA6,8190.2%−0.4 pts

72Webster County, IAIA36,8380.2%0.0 pts

73Guthrie County, IAIA10,7820.2%−0.3 pts

74Cerro Gordo County, IAIA42,3720.2%−0.3 pts

75Greene County, IAIA8,6580.2%−0.2 pts

76Carroll County, IAIA20,3030.2%−0.3 pts

77Monroe County, IAIA7,4060.2%–

78Mahaska County, IAIA21,8800.2%−0.1 pts

79Marshall County, IAIA39,8900.2%−0.2 pts

80Cass County, IAIA12,9600.2%−0.1 pts

81Harrison County, IAIA14,6230.2%−0.3 pts

82Woodbury County, IAIA106,6490.2%−0.1 pts

83Shelby County, IAIA11,6890.2%−0.1 pts

84Bremer County, IAIA25,2960.2%−0.2 pts

85Page County, IAIA14,8560.2%−0.1 pts

86Audubon County, IAIA5,5090.1%−0.1 pts

87Pottawattamie County, IAIA92,9960.1%−0.4 pts

88Franklin County, IAIA9,8680.1%–

89Appanoose County, IAIA12,0770.1%−0.7 pts

90Monona County, IAIA8,5390.1%−0.3 pts

91Calhoun County, IAIA9,5620.1%−0.2 pts

92Dickinson County, IAIA18,0770.1%−0.8 pts

93Madison County, IAIA17,2700.1%−0.1 pts

94Lee County, IAIA32,3060.1%0.0 pts

95Emmet County, IAIA9,1070.1%0.0 pts

96Osceola County, IAIA5,9800.0%−0.5 pts

97Lucas County, IAIA8,8470.0%−0.7 pts

98Winnebago County, IAIA10,2510.0%−0.3 pts

SHOWING 1–98 OF 98

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