Median Age in Mercer County, IL
ACS 2024 5-Year Estimates
How Mercer County Compares
National Distribution
Where Mercer County falls among all 3,222 U.S. counties for median age.
■ Mercer County: 44.7 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #785 | Fremont County, CO | 44.7 years |
| #786 | Edwards County, IL | 44.7 years |
| #787 | Massac County, IL | 44.7 years |
| #788 | Mercer County, IL | 44.7 years |
| #789 | Jackson County, IA | 44.7 years |
| #790 | Van Buren County, IA | 44.7 years |
| #791 | Queen Anne's County, MD | 44.7 years |
Median Age in Mercer County, Illinois
Mercer County, Illinois has a median age of 44.7 years, which ranks #788 of 3,222 out of 3,222 counties nationwide. This is 14.9% above the national value of 38.9 years.
Within Illinois, Mercer County ranks #20 of 102 out of 102 counties. This places it in the 76th percentile nationally.
The median age of the total population. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
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.