RANKING · 2020 CENSUS · 54 SHOWN OF 54

Highest South American population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are South American origin (2020 American Community Survey). A concentration measure: South American residents as a percentage of total population. This list covers the 54 counties in Iowa that qualify, ranked against each other statewide. The median across all 54 is 0.1%.

South Americans: full group profile →

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SAME RANKING BYCities States Metros

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 SHAREVS 2010

01Clarke County, IAIA9,5742.2%–

02Johnson County, IAIA160,0440.5%+0.1 pts

03Jefferson County, IAIA15,2910.5%+0.3 pts

04Lucas County, IAIA8,8470.4%–

05Story County, IAIA101,2910.4%+0.2 pts

06Page County, IAIA14,8560.4%+0.3 pts

07Kossuth County, IAIA14,3220.4%–

08Dallas County, IAIA118,4570.3%−0.2 pts

09Bremer County, IAIA25,2960.3%+0.2 pts

10Dickinson County, IAIA18,0770.3%+0.2 pts

11Pottawattamie County, IAIA92,9960.3%+0.2 pts

12Poweshiek County, IAIA18,3680.3%+0.2 pts

13Winneshiek County, IAIA19,7330.2%+0.2 pts

14Grundy County, IAIA12,3610.2%–

15Hardin County, IAIA16,4550.2%0.0 pts

16Polk County, IAIA516,5460.2%0.0 pts

17O'Brien County, IAIA14,2200.2%+0.1 pts

18Butler County, IAIA14,0490.2%–

19Linn County, IAIA232,0280.2%+0.1 pts

20Des Moines County, IAIA38,0770.2%+0.1 pts

21Montgomery County, IAIA10,0020.2%–

22Woodbury County, IAIA106,6490.2%+0.1 pts

23Decatur County, IAIA7,6550.2%−0.1 pts

24Warren County, IAIA57,3310.2%+0.1 pts

25Wright County, IAIA12,8010.2%+0.1 pts

26Buchanan County, IAIA20,8830.1%–

27Muscatine County, IAIA41,8530.1%−0.1 pts

28Louisa County, IAIA10,4160.1%–

29Black Hawk County, IAIA131,5320.1%−0.1 pts

30Floyd County, IAIA14,9010.1%−0.1 pts

31Dubuque County, IAIA99,3810.1%0.0 pts

32Scott County, IAIA175,2590.1%−0.1 pts

33Fayette County, IAIA19,0470.1%–

34Union County, IAIA11,8290.1%–

35Webster County, IAIA36,8380.1%–

36Henry County, IAIA19,3490.1%−0.2 pts

37Sioux County, IAIA36,7740.1%0.0 pts

38Marshall County, IAIA39,8900.1%0.0 pts

39Benton County, IAIA26,0040.1%–

40Jasper County, IAIA38,1530.0%0.0 pts

41Guthrie County, IAIA10,7820.0%–

42Van Buren County, IAIA7,1310.0%–

43Hamilton County, IAIA14,9440.0%−0.1 pts

44Carroll County, IAIA20,3030.0%–

45Sac County, IAIA9,5250.0%–

46Marion County, IAIA34,1920.0%0.0 pts

47Cedar County, IAIA18,3590.0%–

48Clay County, IAIA16,2020.0%–

49Calhoun County, IAIA9,5620.0%–

50Lee County, IAIA32,3060.0%–

51Chickasaw County, IAIA11,6630.0%–

52Madison County, IAIA17,2700.0%−0.1 pts

53Humboldt County, IAIA9,4090.0%−0.1 pts

54Tama County, IAIA16,7960.0%–

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