RANKING · 1990 CENSUS · 99 SHOWN OF 99

Highest Hispanic population share, Iowa counties · 1990

Iowa counties ranked by the share of all residents who are Hispanic or Latino of any race (1990 American Community Survey). A concentration measure: Hispanic residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDHighest Asian household income Highest Black household income Highest Hispanic household income Highest White (non-Hispanic) household income Largest White (non-Hispanic) population Highest White (non-Hispanic) population share

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPHISPANIC / LATINOVS –

01Muscatine County, IAIA41,8537.1%–

02Louisa County, IAIA10,4162.8%–

03Scott County, IAIA175,2592.8%–

04Woodbury County, IAIA106,6492.6%–

05Polk County, IAIA516,5462.0%–

06Lee County, IAIA32,3061.8%–

07Pottawattamie County, IAIA92,9961.7%–

08Cerro Gordo County, IAIA42,3721.7%–

09Johnson County, IAIA160,0441.2%–

10Fremont County, IAIA6,5221.1%–

11Des Moines County, IAIA38,0771.1%–

12Webster County, IAIA36,8381.0%–

13Story County, IAIA101,2911.0%–

14Worth County, IAIA7,3381.0%–

15Franklin County, IAIA9,8680.9%–

16Page County, IAIA14,8560.9%–

17Jefferson County, IAIA15,2910.9%–

18Wright County, IAIA12,8010.9%–

19Fayette County, IAIA19,0470.8%–

20Crawford County, IAIA16,2370.8%–

21Marshall County, IAIA39,8900.8%–

22Winnebago County, IAIA10,2510.8%–

23Washington County, IAIA22,6670.8%–

24Linn County, IAIA232,0280.8%–

25Hamilton County, IAIA14,9440.8%–

26Hancock County, IAIA10,5280.8%–

27Cedar County, IAIA18,3590.7%–

28Henry County, IAIA19,3490.7%–

29Warren County, IAIA57,3310.7%–

30Cass County, IAIA12,9600.7%–

31Taylor County, IAIA5,8350.7%–

32Black Hawk County, IAIA131,5320.7%–

33Dallas County, IAIA118,4570.6%–

34Floyd County, IAIA14,9010.6%–

35Marion County, IAIA34,1920.6%–

36Wapello County, IAIA35,2100.6%–

37Mahaska County, IAIA21,8800.6%–

38Hardin County, IAIA16,4550.5%–

39Buena Vista County, IAIA20,4490.5%–

40Davis County, IAIA9,2300.5%–

41Decatur County, IAIA7,6550.5%–

42Dubuque County, IAIA99,3810.5%–

43Mitchell County, IAIA10,6500.5%–

44Jasper County, IAIA38,1530.5%–

45Jones County, IAIA21,2530.5%–

46Delaware County, IAIA17,6740.4%–

47Madison County, IAIA17,2700.4%–

48Tama County, IAIA16,7960.4%–

49Clinton County, IAIA46,0020.4%–

50Osceola County, IAIA5,9800.4%–

51Buchanan County, IAIA20,8830.4%–

52Greene County, IAIA8,6580.4%–

53Shelby County, IAIA11,6890.4%–

54Bremer County, IAIA25,2960.4%–

55Calhoun County, IAIA9,5620.4%–

56Mills County, IAIA14,7930.4%–

57Sioux County, IAIA36,7740.4%–

58Ida County, IAIA6,7770.4%–

59Harrison County, IAIA14,6230.4%–

60Sac County, IAIA9,5250.3%–

61Kossuth County, IAIA14,3220.3%–

62Dickinson County, IAIA18,0770.3%–

63Emmet County, IAIA9,1070.3%–

64Boone County, IAIA26,7990.3%–

65Pocahontas County, IAIA6,8190.3%–

66Poweshiek County, IAIA18,3680.3%–

67Chickasaw County, IAIA11,6630.3%–

68Clayton County, IAIA16,8450.3%–

69Clarke County, IAIA9,5740.3%–

70Grundy County, IAIA12,3610.2%–

71Appanoose County, IAIA12,0770.2%–

72Lucas County, IAIA8,8470.2%–

73Adair County, IAIA7,4030.2%–

74Guthrie County, IAIA10,7820.2%–

75Adams County, IAIA3,6170.2%–

76Winneshiek County, IAIA19,7330.2%–

77Van Buren County, IAIA7,1310.2%–

78O'Brien County, IAIA14,2200.2%–

79Howard County, IAIA9,4150.2%–

80Cherokee County, IAIA11,3690.2%–

81Jackson County, IAIA19,2880.2%–

82Benton County, IAIA26,0040.2%–

83Union County, IAIA11,8290.2%–

84Clay County, IAIA16,2020.2%–

85Carroll County, IAIA20,3030.2%–

86Ringgold County, IAIA4,6420.2%–

87Keokuk County, IAIA9,7970.2%–

88Iowa County, IAIA16,5040.2%–

89Audubon County, IAIA5,5090.1%–

90Plymouth County, IAIA25,6970.1%–

91Allamakee County, IAIA14,2380.1%–

92Montgomery County, IAIA10,0020.1%–

93Wayne County, IAIA6,7380.1%–

94Butler County, IAIA14,0490.1%–

95Lyon County, IAIA12,3540.1%–

96Palo Alto County, IAIA8,8990.1%–

97Monona County, IAIA8,5390.1%–

98Humboldt County, IAIA9,4090.1%–

99Monroe County, IAIA7,4060.0%–

SHOWING 1–99 OF 99

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