RANKING · 2024 ACS · 71 SHOWN OF 71

Largest South American population, Iowa counties

Iowa counties ranked by the number of residents who are South American origin, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 71 counties in Iowa that qualify, ranked against each other statewide. The median across all 71 is 25. Biggest climber in the top 100 since 2020: Lee County, IA, up 35 places to #9.

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RELATEDLargest Mexican population Highest Mexican population share Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share

YEAR2010 2020 2024

RANKPLACESTATEPOPSOUTH AMERICAN POPULATIONVS 2010

01Polk County, IAIA516,5461,624+101%

02Johnson County, IAIA160,0441,086+101%

03▲2Dallas County, IAIA118,4571,028+221%

04Story County, IAIA101,291399+87%

05▲4Scott County, IAIA175,259229−11%

06▼3Linn County, IAIA232,028225+3%

07▲3Black Hawk County, IAIA131,532211−4%

08Woodbury County, IAIA106,649178+151%

09▲35Lee County, IAIA32,306153–

10▲1Jefferson County, IAIA15,291148+279%

11▲1Dubuque County, IAIA99,381138+28%

12Cerro Gordo County, IAIA42,372114+396%

13▲3Muscatine County, IAIA41,85392+1%

14▲1Bremer County, IAIA25,29683+246%

15▼8Clarke County, IAIA9,57479–

16▲13Marshall County, IAIA39,89070+900%

17▲9O'Brien County, IAIA14,22068+580%

18▼5Warren County, IAIA57,33166+313%

19▲17Fayette County, IAIA19,04764–

20▲4Buchanan County, IAIA20,88362–

21▲1Hardin County, IAIA16,45555+45%

22▼4Kossuth County, IAIA14,32252–

23▼9Des Moines County, IAIA38,07744+63%

24Taylor County, IAIA5,83541–

25▼6Winneshiek County, IAIA19,73340+400%

26▲5Wright County, IAIA12,80140+567%

27Clinton County, IAIA46,00237−53%

28▲17Cedar County, IAIA18,35936–

29▲14Hamilton County, IAIA14,94436+125%

30▼5Grundy County, IAIA12,36133–

31▲19Calhoun County, IAIA9,56231–

32Plymouth County, IAIA25,69726−64%

33▲9Carroll County, IAIA20,30325–

34▼14Dickinson County, IAIA18,07725+178%

35Pocahontas County, IAIA6,81925–

36▼6Sioux County, IAIA36,77425−7%

37Winnebago County, IAIA10,25125−17%

38Cass County, IAIA12,96022–

39▼2Decatur County, IAIA7,65520−13%

40▼13Butler County, IAIA14,04919–

41▼13Webster County, IAIA36,83819–

42▼4Henry County, IAIA19,34918−62%

43Greene County, IAIA8,65817–

44Palo Alto County, IAIA8,89916–

45Davis County, IAIA9,23015–

46▼40Pottawattamie County, IAIA92,99614−55%

47Buena Vista County, IAIA20,44914−83%

48Allamakee County, IAIA14,23812–

49▼8Union County, IAIA11,82911–

50▼29Poweshiek County, IAIA18,36810−17%

51Clayton County, IAIA16,8459–

52Emmet County, IAIA9,1079–

53▼21Jasper County, IAIA38,1538−43%

54Wapello County, IAIA35,2108−73%

55Worth County, IAIA7,3388+14%

56Boone County, IAIA26,7997−22%

57Franklin County, IAIA9,8687–

58▼12Guthrie County, IAIA10,7827–

59▼42Page County, IAIA14,8566−67%

60▼21Louisa County, IAIA10,4165–

61▼38Lucas County, IAIA8,8475–

62Monona County, IAIA8,5395–

63Audubon County, IAIA5,5094–

64Ida County, IAIA6,7774–

65▼11Tama County, IAIA16,7964–

66▼15Chickasaw County, IAIA11,6633–

67▼20Clay County, IAIA16,2023–

68Crawford County, IAIA16,2373−93%

69▼36Montgomery County, IAIA10,0022–

70Mitchell County, IAIA10,6501–

71Keokuk County, IAIA9,7971–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES