RANKING · 2010 CENSUS · 43 SHOWN OF 43

Highest South American population share, Iowa counties · 2010

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 43 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

01Dallas County, IAIA118,4570.5%–

02Johnson County, IAIA160,0440.4%–

03Buena Vista County, IAIA20,4490.4%–

04Plymouth County, IAIA25,6970.3%–

05Winnebago County, IAIA10,2510.3%–

06Decatur County, IAIA7,6550.3%–

07Floyd County, IAIA14,9010.3%–

08Story County, IAIA101,2910.2%–

09Crawford County, IAIA16,2370.2%–

10Jefferson County, IAIA15,2910.2%–

11Henry County, IAIA19,3490.2%–

12Hardin County, IAIA16,4550.2%–

13Muscatine County, IAIA41,8530.2%–

14Polk County, IAIA516,5460.2%–

15Black Hawk County, IAIA131,5320.2%–

16Scott County, IAIA175,2590.2%–

17Clinton County, IAIA46,0020.2%–

18Mills County, IAIA14,7930.1%–

19Dubuque County, IAIA99,3810.1%–

20Page County, IAIA14,8560.1%–

21Linn County, IAIA232,0280.1%–

22Hamilton County, IAIA14,9440.1%–

23Bremer County, IAIA25,2960.1%–

24Worth County, IAIA7,3380.1%–

25Wapello County, IAIA35,2100.1%–

26Sioux County, IAIA36,7740.1%–

27Humboldt County, IAIA9,4090.1%–

28Madison County, IAIA17,2700.1%–

29Woodbury County, IAIA106,6490.1%–

30O'Brien County, IAIA14,2200.1%–

31Des Moines County, IAIA38,0770.1%–

32Poweshiek County, IAIA18,3680.1%–

33Dickinson County, IAIA18,0770.1%–

34Cerro Gordo County, IAIA42,3720.1%–

35Wright County, IAIA12,8010.0%–

36Winneshiek County, IAIA19,7330.0%–

37Jasper County, IAIA38,1530.0%–

38Warren County, IAIA57,3310.0%–

39Boone County, IAIA26,7990.0%–

40Pottawattamie County, IAIA92,9960.0%–

41Jones County, IAIA21,2530.0%–

42Marshall County, IAIA39,8900.0%–

43Marion County, IAIA34,1920.0%–

SHOWING 1–43 OF 43

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