RANKING · 2020 CENSUS · 54 SHOWN OF 54

Largest South American population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are South American origin, 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 54 counties in Iowa that qualify, ranked against each other statewide. The median across all 54 is 28.

South Americans: full group profile →

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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, IAIA516,5461,100+36%

02Johnson County, IAIA160,044809+50%

03Linn County, IAIA232,028433+99%

04Story County, IAIA101,291402+89%

05Dallas County, IAIA118,457316−1%

06Pottawattamie County, IAIA92,996256+726%

07Clarke County, IAIA9,574207–

08Woodbury County, IAIA106,649170+139%

09Scott County, IAIA175,259140−46%

10Black Hawk County, IAIA131,532137−37%

11Jefferson County, IAIA15,29189+128%

12Dubuque County, IAIA99,38183−23%

13Warren County, IAIA57,33177+381%

14Des Moines County, IAIA38,07775+178%

15Bremer County, IAIA25,29670+192%

16Muscatine County, IAIA41,85358−36%

17Page County, IAIA14,85656+211%

18Kossuth County, IAIA14,32253–

19Winneshiek County, IAIA19,73350+525%

20Dickinson County, IAIA18,07748+433%

21Poweshiek County, IAIA18,36846+283%

22Hardin County, IAIA16,45541+8%

23Lucas County, IAIA8,84736–

24Buchanan County, IAIA20,88331–

25Grundy County, IAIA12,36130–

26O'Brien County, IAIA14,22029+190%

27Butler County, IAIA14,04928–

28Webster County, IAIA36,83823–

29Marshall County, IAIA39,89021+200%

30Sioux County, IAIA36,77420−26%

31Wright County, IAIA12,80119+217%

32Jasper County, IAIA38,15318+29%

33Montgomery County, IAIA10,00217–

34Floyd County, IAIA14,90116−61%

35Benton County, IAIA26,00413–

36Fayette County, IAIA19,04713–

37Decatur County, IAIA7,65512−48%

38Henry County, IAIA19,34912−74%

39Louisa County, IAIA10,41612–

40Marion County, IAIA34,19210+400%

41Union County, IAIA11,8298–

42Carroll County, IAIA20,3037–

43Hamilton County, IAIA14,9446−63%

44Lee County, IAIA32,3066–

45Cedar County, IAIA18,3595–

46Guthrie County, IAIA10,7825–

47Clay County, IAIA16,2024–

48Sac County, IAIA9,5253–

49Van Buren County, IAIA7,1313–

50Calhoun County, IAIA9,5622–

51Chickasaw County, IAIA11,6632–

52Madison County, IAIA17,2702−83%

53Humboldt County, IAIA9,4091−88%

54Tama County, IAIA16,7961–

SHOWING 1–54 OF 54

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