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Median Age in Illinois, by County

Median Age for every county in Illinois, ranked. The highest is Pope County at 53.9 and the lowest is Champaign County at 30.7.

Illinois: 39.0 · United States: 38.9 · median county in Illinois: 42.6

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#County Median Age
1Pope County53.9
2Hardin County53.6
3Jo Daviess County51.5
4Henderson County50.2
5Schuyler County49.1
6Calhoun County48.8
7Alexander County48.0
8Putnam County47.4
9Hancock County46.9
10Gallatin County46.7
11Edgar County46.6
12Marshall County46.1
13Scott County46.0
14Carroll County45.4
15Mason County45.4
16Shelby County45.3
17Stephenson County45.3
18Edwards County44.7
19Massac County44.7
20Mercer County44.7
21Iroquois County44.4
22Stark County44.4
23Jasper County44.3
24Union County44.3
25White County44.3
26Macoupin County44.2
27Washington County44.2
28Bureau County44.1
29Fulton County43.9
30Hamilton County43.9
31Saline County43.8
32De Witt County43.7
33Jersey County43.7
34Randolph County43.7
35Henry County43.6
36Franklin County43.4
37Greene County43.4
38Christian County43.2
39Monroe County43.2
40Wabash County43.2
41Cumberland County43.1
42Lee County43.1
43Pike County43.0
44Pulaski County43.0
45Whiteside County43.0
46Menard County42.8
47Montgomery County42.8
48Piatt County42.8
49Wayne County42.8
50Clark County42.6
51Crawford County42.6
52Knox County42.6
53Richland County42.3
54LaSalle County42.2
55Ogle County42.2
56Perry County42.0
57Fayette County41.9
58Ford County41.9
59Tazewell County41.9
60Livingston County41.8
61Williamson County41.6
62Clinton County41.5
63Marion County41.5
64Adams County41.4
65Johnson County41.4
66Vermilion County41.3
67Jefferson County41.2
68Logan County41.1
69Morgan County41.1
70Brown County41.0
71Sangamon County41.0
72Lawrence County40.7
73McHenry County40.7
74Macon County40.6
75Clay County40.4
76Woodford County40.4
77Rock Island County40.3
78DuPage County40.2
79Madison County40.2
80Moultrie County40.1
81Effingham County40.0
82St. Clair County39.9
83Bond County39.7
84Boone County39.7
85Winnebago County39.6
86Lake County39.1
87Will County39.1
88Kankakee County39.0
89Kane County38.8
90Douglas County38.7
91Warren County38.5
92Cass County38.3
93Grundy County38.3
94Peoria County38.1
95Cook County38.0
96Coles County37.5
97Kendall County36.3
98McDonough County34.9
99McLean County34.3
100DeKalb County32.7
101Jackson County32.4
102Champaign County30.7

Half of residents are older than this and half are younger.

Source: ACS 2020-2024 5-Year Estimates, 2024.

Illinois ranks 29th of 52 states for median age.

Median Age in other states

Other statistics for Illinois by county