RANKING · 2020 CENSUS · 53 SHOWN OF 53

Largest Spaniard population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Spaniard 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 53 counties in Iowa that qualify, ranked against each other statewide.

Spaniard 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

RANKPLACESTATEPOPSPANIARD POPULATIONVS 2010

01Polk County, IAIA516,546461+222%

02Linn County, IAIA232,028260+381%

03Johnson County, IAIA160,044214+328%

04Mahaska County, IAIA21,88077+221%

05Black Hawk County, IAIA131,53272−19%

06Wapello County, IAIA35,21071–

07Woodbury County, IAIA106,64969+331%

08Cerro Gordo County, IAIA42,37268–

09Cass County, IAIA12,96067–

10Story County, IAIA101,29165−21%

11Sioux County, IAIA36,77463–

12Pottawattamie County, IAIA92,99662+182%

13Dubuque County, IAIA99,38159+157%

14Monroe County, IAIA7,40655+224%

15Marion County, IAIA34,19255+400%

16Washington County, IAIA22,66742+24%

17Poweshiek County, IAIA18,36842–

18Crawford County, IAIA16,23741–

19Mills County, IAIA14,79339–

20Guthrie County, IAIA10,78230+275%

21Iowa County, IAIA16,50428–

22Harrison County, IAIA14,62327+286%

23Winneshiek County, IAIA19,73327–

24Lucas County, IAIA8,84726–

25Appanoose County, IAIA12,07726−37%

26Dallas County, IAIA118,45723–

27Scott County, IAIA175,25922−53%

28Emmet County, IAIA9,10717–

29Clinton County, IAIA46,00215–

30Van Buren County, IAIA7,13115–

31Worth County, IAIA7,33814–

32Plymouth County, IAIA25,69712+1100%

33Webster County, IAIA36,83812–

34Jones County, IAIA21,25312–

35O'Brien County, IAIA14,22012–

36Warren County, IAIA57,33111−42%

37Fayette County, IAIA19,04710+67%

38Page County, IAIA14,8568–

39Carroll County, IAIA20,3038–

40Decatur County, IAIA7,6557–

41Kossuth County, IAIA14,3227–

42Lyon County, IAIA12,3546–

43Buena Vista County, IAIA20,4496–

44Hancock County, IAIA10,5285–

45Benton County, IAIA26,0045–

46Adams County, IAIA3,6174−43%

47Delaware County, IAIA17,6744–

48Des Moines County, IAIA38,0773–

49Hardin County, IAIA16,4553–

50Madison County, IAIA17,2702−94%

51Cedar County, IAIA18,3591−92%

52Jasper County, IAIA38,1531–

53Mitchell County, IAIA10,6501–

SHOWING 1–53 OF 53

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS