How Illinois Compares

Illinois

39.0 years

National

38.9 years

0.3% above

State Ranking

Rank	State	Value
#26	North Carolina	39.1 years
#27	Wyoming	39.1 years
#28	Arizona	39.0 years
#29	Illinois	39.0 years
#30	Missouri	39.0 years
#31	Virginia	39.0 years
#32	Tennessee	38.9 years

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Highest Age Counties in Illinois

#	County	Age
1	Pope County	53.9 years
2	Hardin County	53.6 years
3	Jo Daviess County	51.5 years
4	Henderson County	50.2 years
5	Schuyler County	49.1 years
6	Calhoun County	48.8 years
7	Alexander County	48.0 years
8	Putnam County	47.4 years
9	Hancock County	46.9 years
10	Gallatin County	46.7 years

Lowest Age Counties in Illinois

#	County	Age
102	Champaign County	30.7 years
101	Jackson County	32.4 years
100	DeKalb County	32.7 years
99	McLean County	34.3 years
98	McDonough County	34.9 years
97	Kendall County	36.3 years
96	Coles County	37.5 years
95	Cook County	38.0 years
94	Peoria County	38.1 years
93	Grundy County	38.3 years

Median Age in Illinois

Illinois has a median age of 39.0 years, ranking #29 of 52 among all 52 states and territories. This is 0.3% above the national value of 38.9 years.

Across Illinois's 102 counties, median age ranges from 30.7 years to 53.9 years. The county with the highest value is Pope County at 53.9 years.

The median age of the total population.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.