RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Mexican population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Mexican origin (2023 American Community Survey). A concentration measure: Mexican residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest Mexican population Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share Largest Dominican population

YEAR2010 2020 2024

RANKPLACESTATEPOPMEXICAN SHAREVS 2000

01Crawford County, IAIA16,23722.5%–

02Marshall County, IAIA39,89020.9%–

03Buena Vista County, IAIA20,44919.8%–

04Louisa County, IAIA10,41614.9%–

05Muscatine County, IAIA41,85314.3%–

06Woodbury County, IAIA106,64913.7%–

07Franklin County, IAIA9,86812.6%–

08Clarke County, IAIA9,57412.2%–

09Wright County, IAIA12,8019.7%–

10Tama County, IAIA16,7969.6%–

11Sioux County, IAIA36,7749.0%–

12Wapello County, IAIA35,2108.2%–

13Pottawattamie County, IAIA92,9966.6%–

14Emmet County, IAIA9,1076.6%–

15Polk County, IAIA516,5466.5%–

16Osceola County, IAIA5,9806.3%–

17Scott County, IAIA175,2596.2%–

18Hamilton County, IAIA14,9445.7%–

19Washington County, IAIA22,6675.4%–

20Allamakee County, IAIA14,2384.9%–

21Taylor County, IAIA5,8354.6%–

22Cerro Gordo County, IAIA42,3724.1%–

23Plymouth County, IAIA25,6974.1%–

24Webster County, IAIA36,8383.9%–

25Hancock County, IAIA10,5283.7%–

26Dallas County, IAIA118,4573.5%–

27Clay County, IAIA16,2023.5%–

28Winnebago County, IAIA10,2513.3%–

29Hardin County, IAIA16,4553.3%–

30Lee County, IAIA32,3063.3%–

31Sac County, IAIA9,5253.3%–

32Henry County, IAIA19,3493.2%–

33Black Hawk County, IAIA131,5323.2%–

34Humboldt County, IAIA9,4093.2%–

35O'Brien County, IAIA14,2203.1%–

36Johnson County, IAIA160,0443.1%–

37Montgomery County, IAIA10,0022.8%–

38Floyd County, IAIA14,9012.7%–

39Mills County, IAIA14,7932.7%–

40Worth County, IAIA7,3382.6%–

41Chickasaw County, IAIA11,6632.6%–

42Page County, IAIA14,8562.5%–

43Linn County, IAIA232,0282.5%–

44Iowa County, IAIA16,5042.5%–

45Story County, IAIA101,2912.5%–

46Ringgold County, IAIA4,6422.4%–

47Fremont County, IAIA6,5222.4%–

48Lyon County, IAIA12,3542.4%–

49Boone County, IAIA26,7992.4%–

50Union County, IAIA11,8292.4%–

51Ida County, IAIA6,7772.4%–

52Clinton County, IAIA46,0022.3%–

53Warren County, IAIA57,3312.3%–

54Shelby County, IAIA11,6892.2%–

55Decatur County, IAIA7,6552.1%–

56Monona County, IAIA8,5392.0%–

57Cedar County, IAIA18,3592.0%–

58Jasper County, IAIA38,1532.0%–

59Keokuk County, IAIA9,7971.9%–

60Cass County, IAIA12,9601.9%–

61Palo Alto County, IAIA8,8991.8%–

62Pocahontas County, IAIA6,8191.8%–

63Fayette County, IAIA19,0471.8%–

64Mahaska County, IAIA21,8801.7%–

65Des Moines County, IAIA38,0771.7%–

66Clayton County, IAIA16,8451.7%–

67Greene County, IAIA8,6581.6%–

68Guthrie County, IAIA10,7821.6%–

69Jones County, IAIA21,2531.6%–

70Poweshiek County, IAIA18,3681.6%–

71Harrison County, IAIA14,6231.6%–

72Winneshiek County, IAIA19,7331.6%–

73Howard County, IAIA9,4151.6%–

74Madison County, IAIA17,2701.5%–

75Marion County, IAIA34,1921.5%–

76Calhoun County, IAIA9,5621.4%–

77Adair County, IAIA7,4031.4%–

78Dubuque County, IAIA99,3811.4%–

79Davis County, IAIA9,2301.4%–

80Dickinson County, IAIA18,0771.4%–

81Jefferson County, IAIA15,2911.4%–

82Kossuth County, IAIA14,3221.3%–

83Appanoose County, IAIA12,0771.3%–

84Monroe County, IAIA7,4061.2%–

85Buchanan County, IAIA20,8831.2%–

86Lucas County, IAIA8,8471.2%–

87Carroll County, IAIA20,3031.2%–

88Adams County, IAIA3,6171.1%–

89Wayne County, IAIA6,7381.1%–

90Benton County, IAIA26,0041.1%–

91Jackson County, IAIA19,2881.1%–

92Butler County, IAIA14,0491.1%–

93Mitchell County, IAIA10,6501.1%–

94Van Buren County, IAIA7,1311.0%–

95Delaware County, IAIA17,6741.0%–

96Grundy County, IAIA12,3611.0%–

97Bremer County, IAIA25,2960.9%–

98Audubon County, IAIA5,5090.7%–

99Cherokee County, IAIA11,3690.7%–

SHOWING 1–99 OF 99

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