Median Age in Stephenson County, IL
ACS 2024 5-Year Estimates
45.3 years
Rank #701/3,222 · #17 in IL
78th
Stephenson 45.3 years
IL 39.0 years +16.2%
US 38.9 years +16.5%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Stephenson County's median age of 45.3 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 Stephenson County for median age.
Nearby Rankings
Full ranking →| #698 | Palm Beach County, FL | 45.3 years |
| #699 | Clay County, GA | 45.3 years |
| #700 | Shelby County, IL | 45.3 years |
| #701 | Stephenson County, IL | 45.3 years |
| #702 | York County, ME | 45.3 years |
| #703 | Pope County, MN | 45.3 years |
| #704 | Rutherford County, NC | 45.3 years |
About Median Age
Stephenson County, Illinois has a median age of 45.3 years, ranking #701 of 3,222 counties nationwide — 16.5% above the national value of 38.9 years. Within Illinois, it ranks #17 of 102. This places it in the 78th 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.