RANKING · 2020 CENSUS · 98 SHOWN OF 98

Largest Swiss population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Swiss ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 98 counties in Iowa that qualify, ranked against each other statewide.

Swiss Americans: full group profile →

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 POPULATIONVS 2010

01Polk County, IAIA516,5461,446+12%

02Johnson County, IAIA160,0441,382+63%

03Linn County, IAIA232,0281,017−30%

04Dubuque County, IAIA99,381831−5%

05Black Hawk County, IAIA131,532827+71%

06Dallas County, IAIA118,457654+45%

07Scott County, IAIA175,259609−32%

08Washington County, IAIA22,667516−3%

09Story County, IAIA101,291462−25%

10Fayette County, IAIA19,047395−12%

11Howard County, IAIA9,415394+203%

12Jones County, IAIA21,253362+55%

13Clayton County, IAIA16,845247−36%

14Davis County, IAIA9,230240+33%

15Des Moines County, IAIA38,077234+21%

16Marion County, IAIA34,192228+22700%

17Jackson County, IAIA19,288202+177%

18Sioux County, IAIA36,774202+254%

19Henry County, IAIA19,349197+55%

20Lyon County, IAIA12,354196−53%

21Floyd County, IAIA14,901193+141%

22Woodbury County, IAIA106,649175−45%

23Warren County, IAIA57,331170+29%

24Benton County, IAIA26,004146+22%

25Jasper County, IAIA38,153140+9%

26Van Buren County, IAIA7,131131+44%

27Iowa County, IAIA16,504128−45%

28Allamakee County, IAIA14,238127−53%

29Pottawattamie County, IAIA92,996122−73%

30Clinton County, IAIA46,002116−22%

31Wapello County, IAIA35,210113+465%

32Union County, IAIA11,829106+152%

33Buchanan County, IAIA20,883106−8%

34Keokuk County, IAIA9,797105+128%

35Muscatine County, IAIA41,853105+6%

36Mitchell County, IAIA10,65099−10%

37Cerro Gordo County, IAIA42,37290−62%

38Hancock County, IAIA10,52886+406%

39Kossuth County, IAIA14,32285−38%

40Tama County, IAIA16,79685+467%

41Butler County, IAIA14,04980+135%

42Webster County, IAIA36,83880−19%

43Taylor County, IAIA5,83577+114%

44Marshall County, IAIA39,89075−53%

45Palo Alto County, IAIA8,89973−68%

46Winneshiek County, IAIA19,73372−30%

47Delaware County, IAIA17,67470−43%

48Humboldt County, IAIA9,40970+112%

49Wright County, IAIA12,80169+393%

50Ida County, IAIA6,77767+191%

51Boone County, IAIA26,79966−58%

52Buena Vista County, IAIA20,44962+41%

53Crawford County, IAIA16,23762+138%

54Plymouth County, IAIA25,69762−44%

55Poweshiek County, IAIA18,36861+5%

56Hamilton County, IAIA14,94461−23%

57Jefferson County, IAIA15,29161−13%

58Chickasaw County, IAIA11,66356−50%

59Clay County, IAIA16,20254−24%

60Cedar County, IAIA18,35950−46%

61O'Brien County, IAIA14,22050+733%

62Mills County, IAIA14,79348−17%

63Louisa County, IAIA10,41646−6%

64Cherokee County, IAIA11,36945−40%

65Sac County, IAIA9,52545+41%

66Grundy County, IAIA12,36144+83%

67Mahaska County, IAIA21,88043−30%

68Montgomery County, IAIA10,00243+8%

69Carroll County, IAIA20,30340−61%

70Hardin County, IAIA16,45539−52%

71Bremer County, IAIA25,29638−57%

72Clarke County, IAIA9,57429+45%

73Lee County, IAIA32,30627+0%

74Decatur County, IAIA7,65526−77%

75Wayne County, IAIA6,73825+14%

76Cass County, IAIA12,96024−35%

77Harrison County, IAIA14,62324−63%

78Guthrie County, IAIA10,78223−59%

79Page County, IAIA14,85623−44%

80Fremont County, IAIA6,52221+250%

81Greene County, IAIA8,65818−55%

82Shelby County, IAIA11,68918−42%

83Worth County, IAIA7,33818−18%

84Dickinson County, IAIA18,07717−88%

85Adair County, IAIA7,40316−30%

86Appanoose County, IAIA12,07716−85%

87Madison County, IAIA17,27015−46%

88Monroe County, IAIA7,40615–

89Pocahontas County, IAIA6,81915−66%

90Franklin County, IAIA9,86813–

91Calhoun County, IAIA9,56212−66%

92Monona County, IAIA8,53911−70%

93Adams County, IAIA3,6179−69%

94Audubon County, IAIA5,5098−50%

95Emmet County, IAIA9,1075−44%

96Lucas County, IAIA8,8474−94%

97Winnebago County, IAIA10,2514−90%

98Osceola County, IAIA5,9803−92%

SHOWING 1–98 OF 98

Download CSV (full list, 98 rows)

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