Median Age in Knox County, IL
ACS 2024 5-Year Estimates
42.6 years
Rank #1,316/3,222 · #52 in IL
59th
Knox 42.6 years
IL 39.0 years +9.2%
US 38.9 years +9.5%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Knox County's median age of 42.6 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 Knox County for median age.
Nearby Rankings
Full ranking →| #1,313 | Dodge County, GA | 42.6 years |
| #1,314 | Clark County, IL | 42.6 years |
| #1,315 | Crawford County, IL | 42.6 years |
| #1,316 | Knox County, IL | 42.6 years |
| #1,317 | Pulaski County, IN | 42.6 years |
| #1,318 | Winneshiek County, IA | 42.6 years |
| #1,319 | Magoffin County, KY | 42.6 years |
About Median Age
Knox County, Illinois has a median age of 42.6 years, ranking #1,316 of 3,222 counties nationwide — 9.5% above the national value of 38.9 years. Within Illinois, it ranks #52 of 102. This places it in the 59th 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.