Median Age in Williamson County, TN
ACS 2024 5-Year Estimates
40.4 years
Rank #2,009/3,222 · #63 in TN
38th
Williamson 40.4 years
TN 38.9 years +3.9%
US 38.9 years +3.9%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Williamson County's median age of 40.4 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 Williamson County for median age.
Nearby Rankings
Full ranking →| #2,006 | Kershaw County, SC | 40.4 years |
| #2,007 | Codington County, SD | 40.4 years |
| #2,008 | Henderson County, TN | 40.4 years |
| #2,009 | Williamson County, TN | 40.4 years |
| #2,010 | Collingsworth County, TX | 40.4 years |
| #2,011 | Danville city, VA | 40.4 years |
| #2,012 | Chelan County, WA | 40.4 years |
About Median Age
Williamson County, Tennessee has a median age of 40.4 years, ranking #2,009 of 3,222 counties nationwide — 3.9% above the national value of 38.9 years. Within Tennessee, it ranks #63 of 95. This places it in the 38th 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.