RANKING · 2020 CENSUS · 102 SHOWN OF 102

Largest Mexican population, Illinois counties · 2020

Illinois 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 102 counties in Illinois that qualify, ranked against each other statewide.

Mexican Americans: full group profile →

IllinoisAll states All rankings

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

01Cook County, ILIL5,194,6251,001,481+8%

02Kane County, ILIL525,757144,638+10%

03Lake County, ILIL719,339122,278+13%

04Will County, ILIL712,253102,093+22%

05DuPage County, ILIL934,298100,287+11%

06McHenry County, ILIL317,75131,577+16%

07Winnebago County, ILIL283,67430,879+25%

08Kendall County, ILIL145,47020,426+58%

09Rock Island County, ILIL141,86916,094+10%

10Boone County, ILIL53,56810,529+11%

11Kankakee County, ILIL105,52510,498+32%

12DeKalb County, ILIL101,8359,192+15%

13LaSalle County, ILIL107,7739,171+27%

14Champaign County, ILIL209,9728,090+19%

15St. Clair County, ILIL250,7087,495+34%

16Madison County, ILIL263,1106,795+31%

17Peoria County, ILIL178,5536,230+19%

18McLean County, ILIL171,4195,787+21%

19Whiteside County, ILIL54,1215,388+4%

20Ogle County, ILIL51,3994,686+12%

21Grundy County, ILIL54,0524,435+33%

22Vermilion County, ILIL71,2593,217+10%

23Bureau County, ILIL32,5102,810+33%

24Sangamon County, ILIL194,1702,602+28%

25Henry County, ILIL48,0952,564+38%

26Tazewell County, ILIL130,0492,331+35%

27Knox County, ILIL47,7672,217+29%

28Cass County, ILIL12,4631,809+11%

29Lee County, ILIL32,9141,747+38%

30Jackson County, ILIL52,5011,673+61%

31Iroquois County, ILIL26,1501,651+17%

32Macon County, ILIL99,3001,578+40%

33Stephenson County, ILIL43,2201,518+63%

34Williamson County, ILIL67,2251,494+157%

35Warren County, ILIL16,2221,462+32%

36Douglas County, ILIL19,8801,286+19%

37Livingston County, ILIL35,0571,242+21%

38Coles County, ILIL46,6071,075+24%

39Clinton County, ILIL37,1281,043+33%

40Randolph County, ILIL29,921900+64%

41Union County, ILIL16,656747−0%

42McDonough County, ILIL25,916671+4%

43Jefferson County, ILIL36,147619+3%

44Effingham County, ILIL34,519618+42%

45Fulton County, ILIL32,901600−3%

46Adams County, ILIL64,267598+20%

47Jo Daviess County, ILIL21,594598+16%

48Logan County, ILIL27,182594−9%

49Morgan County, ILIL32,515571+8%

50Perry County, ILIL20,160558+55%

51Monroe County, ILIL34,840529+96%

52Woodford County, ILIL38,111520+29%

53Marion County, ILIL36,382508+3%

54Franklin County, ILIL36,916428+34%

55Christian County, ILIL33,443418+33%

56Bond County, ILIL16,959392+28%

57Ford County, ILIL13,216381+96%

58Massac County, ILIL13,502346+861%

59Montgomery County, ILIL28,076346+21%

60De Witt County, ILIL15,118339+11%

61Carroll County, ILIL15,419335+5%

62Brown County, ILIL6,401331−7%

63Johnson County, ILIL13,363331+34%

64Marshall County, ILIL11,473331+59%

65Macoupin County, ILIL43,748323+5%

66Mercer County, ILIL15,229317+48%

67Putnam County, ILIL5,619316+71%

68Saline County, ILIL22,772306−3%

69Fayette County, ILIL20,790306+79%

70Lawrence County, ILIL13,790295+1%

71Crawford County, ILIL18,648250−11%

72Clark County, ILIL15,114242+310%

73Wabash County, ILIL10,907189+128%

74Jersey County, ILIL21,160186+4%

75Hancock County, ILIL16,803177+190%

76Edgar County, ILIL16,323165+94%

77Piatt County, ILIL16,791163+52%

78Pike County, ILIL14,231157+74%

79Moultrie County, ILIL14,371150+142%

80Greene County, ILIL11,313133+49%

81Richland County, ILIL15,219126+110%

82Shelby County, ILIL20,576124−4%

83White County, ILIL13,250114+36%

84Hamilton County, ILIL7,859106+1078%

85Cumberland County, ILIL10,208102+113%

86Menard County, ILIL11,863102+70%

87Mason County, ILIL12,411101+16%

88Wayne County, ILIL15,882100−29%

89Stark County, ILIL5,31998+46%

90Pulaski County, ILIL4,82095+25%

91Henderson County, ILIL5,98492+254%

92Washington County, ILIL13,56488−34%

93Scott County, ILIL4,86655+511%

94Calhoun County, ILIL4,30054+575%

95Jasper County, ILIL9,03251−16%

96Pope County, ILIL3,67247−46%

97Hardin County, ILIL3,58830+0%

98Alexander County, ILIL4,57028+27%

99Schuyler County, ILIL6,65726−67%

100Edwards County, ILIL5,89819–

101Gallatin County, ILIL4,61619+111%

102Clay County, ILIL12,79316−87%

SHOWING 1–102 OF 102

Download CSV (full list, 102 rows)

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