RANKING · 2020 CENSUS · 99 SHOWN OF 99

Largest Mexican population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Mexican 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 99 counties in Iowa that qualify, ranked against each other statewide.

Mexican Americans: full group profile →

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SAME RANKING BYCities States Metros

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

YEAR2010 2020 2024

RANKPLACESTATEPOPMEXICAN POPULATIONVS 2010

01Polk County, IAIA516,54631,476+31%

02Woodbury County, IAIA106,64914,088+34%

03Scott County, IAIA175,25910,732+42%

04Marshall County, IAIA39,8908,335+49%

05Pottawattamie County, IAIA92,9966,204+39%

06Muscatine County, IAIA41,8536,118+16%

07Linn County, IAIA232,0285,636+45%

08Johnson County, IAIA160,0444,645+46%

09Black Hawk County, IAIA131,5324,273+27%

10Buena Vista County, IAIA20,4493,957+16%

11Crawford County, IAIA16,2373,823+41%

12Dallas County, IAIA118,4573,154+34%

13Sioux County, IAIA36,7743,149+41%

14Wapello County, IAIA35,2102,889+39%

15Story County, IAIA101,2912,404+67%

16Cerro Gordo County, IAIA42,3721,765+37%

17Louisa County, IAIA10,4161,658+5%

18Tama County, IAIA16,7961,629+74%

19Webster County, IAIA36,8381,430+26%

20Dubuque County, IAIA99,3811,384+17%

21Franklin County, IAIA9,8681,275+34%

22Wright County, IAIA12,8011,223+37%

23Washington County, IAIA22,6671,183+54%

24Warren County, IAIA57,3311,158+85%

25Clarke County, IAIA9,5741,141+120%

26Lee County, IAIA32,3061,112+26%

27Clinton County, IAIA46,0021,085+8%

28Plymouth County, IAIA25,6971,022+164%

29Hamilton County, IAIA14,944847+52%

30Jasper County, IAIA38,153728+43%

31Des Moines County, IAIA38,077682−28%

32Allamakee County, IAIA14,238672+89%

33Henry County, IAIA19,349645+12%

34Boone County, IAIA26,799634+48%

35Emmet County, IAIA9,107614+70%

36Clay County, IAIA16,202559+55%

37Hardin County, IAIA16,455559+29%

38Marion County, IAIA34,192489+200%

39O'Brien County, IAIA14,220428+1%

40Floyd County, IAIA14,901425+97%

41Mills County, IAIA14,793405+111%

42Iowa County, IAIA16,504403+128%

43Hancock County, IAIA10,528398+10%

44Mahaska County, IAIA21,880390+41%

45Page County, IAIA14,856384+3%

46Osceola County, IAIA5,980380+45%

47Cedar County, IAIA18,359374+72%

48Fayette County, IAIA19,047352+24%

49Winnebago County, IAIA10,251346+151%

50Jones County, IAIA21,253334+328%

51Sac County, IAIA9,525317+101%

52Winneshiek County, IAIA19,733317+31%

53Chickasaw County, IAIA11,663316+68%

54Humboldt County, IAIA9,409308+35%

55Clayton County, IAIA16,845297+32%

56Union County, IAIA11,829295+103%

57Poweshiek County, IAIA18,368295+31%

58Lyon County, IAIA12,354284+86%

59Benton County, IAIA26,004283+36%

60Taylor County, IAIA5,835282+10%

61Montgomery County, IAIA10,002278+4%

62Buchanan County, IAIA20,883260+72%

63Shelby County, IAIA11,689256+700%

64Jefferson County, IAIA15,291251−10%

65Madison County, IAIA17,270246+98%

66Carroll County, IAIA20,303241−5%

67Cass County, IAIA12,960241+21%

68Dickinson County, IAIA18,077240+109%

69Harrison County, IAIA14,623222+222%

70Bremer County, IAIA25,296213+87%

71Jackson County, IAIA19,288211+206%

72Kossuth County, IAIA14,322200+45%

73Worth County, IAIA7,338196+59%

74Keokuk County, IAIA9,797189+186%

75Monona County, IAIA8,539176+96%

76Guthrie County, IAIA10,782175+37%

77Delaware County, IAIA17,674173+253%

78Decatur County, IAIA7,655168−8%

79Fremont County, IAIA6,522166+5%

80Ida County, IAIA6,777164+113%

81Appanoose County, IAIA12,077162+65%

82Palo Alto County, IAIA8,899161+106%

83Butler County, IAIA14,049157+54%

84Greene County, IAIA8,658147+36%

85Howard County, IAIA9,415144+97%

86Calhoun County, IAIA9,562139+148%

87Davis County, IAIA9,230126+740%

88Pocahontas County, IAIA6,819121+21%

89Ringgold County, IAIA4,642120+243%

90Grundy County, IAIA12,361118+90%

91Mitchell County, IAIA10,650113+59%

92Lucas County, IAIA8,847104+35%

93Adair County, IAIA7,403101+94%

94Monroe County, IAIA7,40697+126%

95Cherokee County, IAIA11,36980−61%

96Van Buren County, IAIA7,13173+143%

97Wayne County, IAIA6,73872–

98Adams County, IAIA3,61741−49%

99Audubon County, IAIA5,50940+11%

SHOWING 1–99 OF 99

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS