RANKING · 2024 ACS · 78 SHOWN OF 78

Largest South American population, Illinois counties

Illinois counties ranked by the number of residents who are South American origin, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 78 counties in Illinois that qualify, ranked against each other statewide. The median across all 78 is 45. Biggest climber in the top 100 since 2020: Cass County, IL, up 43 places to #21.

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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

RANKPLACESTATEPOPSOUTH AMERICAN POPULATIONVS 2010

01Cook County, ILIL5,194,62587,744+74%

02DuPage County, ILIL934,29810,799+71%

03Lake County, ILIL719,3397,523+78%

04▲1Kane County, ILIL525,7575,603+161%

05▼1Will County, ILIL712,2534,090+46%

06McHenry County, ILIL317,7512,181+121%

07Champaign County, ILIL209,9721,727+66%

08Winnebago County, ILIL283,6741,283+38%

09▲2Kendall County, ILIL145,4701,032+101%

10▲4Sangamon County, ILIL194,170780+64%

11▲1Peoria County, ILIL178,553743+194%

12▲3Madison County, ILIL263,110669+514%

13Rock Island County, ILIL141,869487+199%

14▼5DeKalb County, ILIL101,835468+60%

15▼5McLean County, ILIL171,419393+69%

16▲4St. Clair County, ILIL250,708324−12%

17▲10LaSalle County, ILIL107,773273+4%

18▼2Macon County, ILIL99,300243−33%

19▲16Grundy County, ILIL54,052223+1758%

20▲3Stephenson County, ILIL43,220198+1423%

21▲43Cass County, ILIL12,463190–

22Christian County, ILIL33,443175+872%

23▼5Boone County, ILIL53,568167−36%

24▲29Knox County, ILIL47,767152−54%

25▲40Effingham County, ILIL34,519122–

26▼9Kankakee County, ILIL105,525112+7%

27▼8Jackson County, ILIL52,501105−52%

28▼7Logan County, ILIL27,182104+700%

29▲18Coles County, ILIL46,60788+120%

30▼8Tazewell County, ILIL130,04987+38%

31▲37Crawford County, ILIL18,64883–

32Lee County, ILIL32,91475+134%

33▼7Iroquois County, ILIL26,15071+610%

34▲33Pike County, ILIL14,23169–

35Wabash County, ILIL10,90764+276%

36▲16Woodford County, ILIL38,11153–

37Johnson County, ILIL13,36350–

38▲12Whiteside County, ILIL54,12148−41%

39▼15Adams County, ILIL64,26745−32%

40▲16Franklin County, ILIL36,91638–

41Putnam County, ILIL5,61938–

42▼4Williamson County, ILIL67,22538−68%

43Mason County, ILIL12,41137+363%

44▲13Morgan County, ILIL32,51537–

45▼17Fulton County, ILIL32,90135−8%

46▼7Moultrie County, ILIL14,37134–

47Carroll County, ILIL15,41933+154%

48▲15Hancock County, ILIL16,80333–

49▼24Macoupin County, ILIL43,74832–

50▼10Marion County, ILIL36,38232+433%

51▼8Jo Daviess County, ILIL21,59430–

52▼8Richland County, ILIL15,21927–

53▲2Douglas County, ILIL19,88026+117%

54▼21McDonough County, ILIL25,91625+56%

55Fayette County, ILIL20,79023–

56▲6Ogle County, ILIL51,39922+100%

57▼16Massac County, ILIL13,50220+67%

58▼10Livingston County, ILIL35,05719−70%

59▼10White County, ILIL13,25019–

60▼31Henry County, ILIL48,09518−81%

61▼15Bond County, ILIL16,95913−90%

62▼8Bureau County, ILIL32,51011−88%

63▼3Brown County, ILIL6,40110–

64▼30Jersey County, ILIL21,16010−70%

65Montgomery County, ILIL28,0768–

66Perry County, ILIL20,1606−76%

67Clay County, ILIL12,7935–

68▼7Marshall County, ILIL11,4735+67%

69▼39Vermilion County, ILIL71,2595−96%

70▼12Ford County, ILIL13,2163+50%

71Clinton County, ILIL37,1282−60%

72Calhoun County, ILIL4,3002–

73▼4Greene County, ILIL11,3132–

74Union County, ILIL16,6562–

75▼30Washington County, ILIL13,5642–

76▼6Jasper County, ILIL9,0321–

77Stark County, ILIL5,3191–

78▼47Warren County, ILIL16,2221−93%

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES