Median Age in Mason County, IL
ACS 2024 5-Year Estimates
How Mason County Compares
National Distribution
Where Mason County falls among all 3,222 U.S. counties for median age.
■ Mason County: 45.4 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #682 | Grand County, CO | 45.4 years |
| #683 | Kiowa County, CO | 45.4 years |
| #684 | Carroll County, IL | 45.4 years |
| #685 | Mason County, IL | 45.4 years |
| #686 | Hardin County, IA | 45.4 years |
| #687 | Morgan County, MO | 45.4 years |
| #688 | Lincoln County, NV | 45.4 years |
Median Age in Mason County, Illinois
Mason County, Illinois has a median age of 45.4 years, which ranks #685 of 3,222 out of 3,222 counties nationwide. This is 16.7% above the national value of 38.9 years.
Within Illinois, Mason County ranks #15 of 102 out of 102 counties. This places it in the 79th 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.