Median Age in McLean County, IL
ACS 2024 5-Year Estimates
34.3 years
Rank #3,012/3,222 · #99 in IL
7th
McLean 34.3 years
IL 39.0 years -12.1%
US 38.9 years -11.8%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How McLean County's median age of 34.3 years compares to all 3,222 U.S. counties. Values range from 21.4 years to 86.2 years.
Distribution of Median Age Across All Counties
Ranking Context
Counties ranked closest to McLean County for median age.
Nearby Rankings
Full ranking →| #3,009 | Beaver County, UT | 34.4 years |
| #3,010 | Millard County, UT | 34.4 years |
| #3,011 | Newport News city, VA | 34.4 years |
| #3,012 | McLean County, IL | 34.3 years |
| #3,013 | Wyandotte County, KS | 34.3 years |
| #3,014 | Lancaster County, NE | 34.3 years |
| #3,015 | Doña Ana County, NM | 34.3 years |
About Median Age
McLean County, Illinois has a median age of 34.3 years, ranking #3,012 of 3,222 counties nationwide — 11.8% below the national value of 38.9 years. Within Illinois, it ranks #99 of 102. This places it in the 7th percentile nationally.
The median age of the total population. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.