RANKING · 2024 ACS · 102 SHOWN OF 102

Oldest by median age, Illinois counties

Illinois counties ranked by median age of residents (2024 ACS). This list covers the 102 counties in Illinois that qualify, ranked against each other statewide. The median across all 102 is 42.6. Biggest climber in the top 100 since 2020: Edwards County, IL, up 20 places to #18.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Pope County, ILIL3,67253.9+31%

02Hardin County, ILIL3,58853.6+27%

03▲1Jo Daviess County, ILIL21,59451.5+24%

04▼1Henderson County, ILIL5,98450.2+22%

05▲2Schuyler County, ILIL6,65749.1+20%

06Calhoun County, ILIL4,30048.8+20%

07▼2Alexander County, ILIL4,57048.0+26%

08▲1Putnam County, ILIL5,61947.4+20%

09▲3Hancock County, ILIL16,80346.9+16%

10▼2Gallatin County, ILIL4,61646.7+15%

11▲5Edgar County, ILIL16,32346.6+19%

12▼1Marshall County, ILIL11,47346.1+13%

13▲12Scott County, ILIL4,86646.0+19%

14▼4Carroll County, ILIL15,41945.4+11%

15▼2Mason County, ILIL12,41145.4+15%

16▲2Shelby County, ILIL20,57645.3+15%

17▼2Stephenson County, ILIL43,22045.3+18%

18▲20Edwards County, ILIL5,89844.7+10%

19▲10Massac County, ILIL13,50244.7+13%

20▼1Mercer County, ILIL15,22944.7+13%

21▲2Iroquois County, ILIL26,15044.4+12%

22▼5Stark County, ILIL5,31944.4+11%

23▲10Jasper County, ILIL9,03244.3+16%

24▼3Union County, ILIL16,65644.3+10%

25▼5White County, ILIL13,25044.3+5%

26▼2Macoupin County, ILIL43,74844.2+14%

27▼1Washington County, ILIL13,56444.2+14%

28▼6Bureau County, ILIL32,51044.1+11%

29▲1Fulton County, ILIL32,90143.9+12%

30▲14Hamilton County, ILIL7,85943.9+8%

31▲12Saline County, ILIL22,77243.8+10%

32▲5De Witt County, ILIL15,11843.7+14%

33▼2Jersey County, ILIL21,16043.7+17%

34▲14Randolph County, ILIL29,92143.7+16%

35▲10Henry County, ILIL48,09543.6+12%

36▼4Franklin County, ILIL36,91643.4+8%

37▼9Greene County, ILIL11,31343.4+15%

38▲15Monroe County, ILIL34,84043.2+15%

39▲1Christian County, ILIL33,44343.2+11%

40▲9Wabash County, ILIL10,90743.2+11%

41▲13Cumberland County, ILIL10,20843.1+16%

42▼8Lee County, ILIL32,91443.1+14%

43▲7Pike County, ILIL14,23143.0+8%

44▼30Pulaski County, ILIL4,82043.0+14%

45▼18Whiteside County, ILIL54,12143.0+12%

46▼7Menard County, ILIL11,86342.8+13%

47▼12Montgomery County, ILIL28,07642.8+12%

48▼12Piatt County, ILIL16,79142.8+8%

49▲7Wayne County, ILIL15,88242.8+7%

50▼3Crawford County, ILIL18,64842.6+10%

51▼10Clark County, ILIL15,11442.6+9%

52▼10Knox County, ILIL47,76742.6+8%

53▼7Richland County, ILIL15,21942.3+8%

54▲4LaSalle County, ILIL107,77342.2+11%

55▲9Ogle County, ILIL51,39942.2+13%

56▲6Perry County, ILIL20,16042.0+12%

57▲13Fayette County, ILIL20,79041.9+12%

58▼6Ford County, ILIL13,21641.9+6%

59▲6Tazewell County, ILIL130,04941.9+10%

60Livingston County, ILIL35,05741.8+12%

61▲5Williamson County, ILIL67,22541.6+7%

62▲9Clinton County, ILIL37,12841.5+13%

63▼6Marion County, ILIL36,38241.5+8%

64▲8Adams County, ILIL64,26741.4+8%

65▼10Johnson County, ILIL13,36341.4+13%

66▲2Vermilion County, ILIL71,25941.3+9%

67▼6Jefferson County, ILIL36,14741.2+10%

68▼5Logan County, ILIL27,18241.1+11%

69▼10Morgan County, ILIL32,51541.1+9%

70▲4Sangamon County, ILIL194,17041.0+10%

71▲12Brown County, ILIL6,40141.0+16%

72▼3Lawrence County, ILIL13,79040.70%

73▲5McHenry County, ILIL317,75140.7+19%

74▼1Macon County, ILIL99,30040.6+7%

75▼24Clay County, ILIL12,79340.4+2%

76Woodford County, ILIL38,11140.4+7%

77▲2Rock Island County, ILIL141,86940.3+7%

78▲4DuPage County, ILIL934,29840.2+14%

79▲2Madison County, ILIL263,11040.2+9%

80▼5Moultrie County, ILIL14,37140.1+4%

81▼1Effingham County, ILIL34,51940.0+12%

82▲6St. Clair County, ILIL250,70839.9+13%

83▼16Bond County, ILIL16,95939.7+8%

84▲1Boone County, ILIL53,56839.7+15%

85▼1Winnebago County, ILIL283,67439.6+10%

86▲3Lake County, ILIL719,33939.1+16%

87▲4Will County, ILIL712,25339.1+17%

88▼1Kankakee County, ILIL105,52539.0+11%

89▲6Kane County, ILIL525,75738.8+20%

90▼4Douglas County, ILIL19,88038.7+3%

91▼14Warren County, ILIL16,22238.5+2%

92▼2Cass County, ILIL12,46338.3+3%

93Grundy County, ILIL54,05238.3+6%

94Peoria County, ILIL178,55338.1+6%

95▲1Cook County, ILIL5,194,62538.0+13%

96▼4Coles County, ILIL46,60737.5+22%

97▲1Kendall County, ILIL145,47036.3+6%

98▼1McDonough County, ILIL25,91634.9+20%

99McLean County, ILIL171,41934.3+12%

100▲1DeKalb County, ILIL101,83532.7+15%

101▼1Jackson County, ILIL52,50132.4+18%

102Champaign County, ILIL209,97230.7+7%

SHOWING 1–102 OF 102

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