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 (2023 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.

IowaAll states All rankings

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 2000

01Clarke County, IAIA9,5742.2%–

02Johnson County, IAIA160,0440.5%–

03Jefferson County, IAIA15,2910.5%–

04Lucas County, IAIA8,8470.4%–

05Story County, IAIA101,2910.4%–

06Page County, IAIA14,8560.4%–

07Kossuth County, IAIA14,3220.4%–

08Dallas County, IAIA118,4570.3%–

09Bremer County, IAIA25,2960.3%–

10Dickinson County, IAIA18,0770.3%–

11Pottawattamie County, IAIA92,9960.3%–

12Poweshiek County, IAIA18,3680.3%–

13Winneshiek County, IAIA19,7330.2%–

14Grundy County, IAIA12,3610.2%–

15Hardin County, IAIA16,4550.2%–

16Polk County, IAIA516,5460.2%–

17O'Brien County, IAIA14,2200.2%–

18Butler County, IAIA14,0490.2%–

19Linn County, IAIA232,0280.2%–

20Des Moines County, IAIA38,0770.2%–

21Montgomery County, IAIA10,0020.2%–

22Woodbury County, IAIA106,6490.2%–

23Decatur County, IAIA7,6550.2%–

24Warren County, IAIA57,3310.2%–

25Wright County, IAIA12,8010.2%–

26Buchanan County, IAIA20,8830.1%–

27Muscatine County, IAIA41,8530.1%–

28Louisa County, IAIA10,4160.1%–

29Black Hawk County, IAIA131,5320.1%–

30Floyd County, IAIA14,9010.1%–

31Dubuque County, IAIA99,3810.1%–

32Scott County, IAIA175,2590.1%–

33Fayette County, IAIA19,0470.1%–

34Union County, IAIA11,8290.1%–

35Webster County, IAIA36,8380.1%–

36Henry County, IAIA19,3490.1%–

37Sioux County, IAIA36,7740.1%–

38Marshall County, IAIA39,8900.1%–

39Benton County, IAIA26,0040.1%–

40Jasper County, IAIA38,1530.0%–

41Guthrie County, IAIA10,7820.0%–

42Van Buren County, IAIA7,1310.0%–

43Hamilton County, IAIA14,9440.0%–

44Carroll County, IAIA20,3030.0%–

45Sac County, IAIA9,5250.0%–

46Marion County, IAIA34,1920.0%–

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%–

53Humboldt County, IAIA9,4090.0%–

54Tama County, IAIA16,7960.0%–

SHOWING 1–54 OF 54

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES