Nationally, the median age is 38.2 years. Utah is the youngest state in the union, with a median age of 30.5 years. Here are the top ten youngest states in 2018, the last year for which we have comprehensive numbers.
The United States: Information & Statistics By State
|2018 rank||State||Median age|
|2.||District of Columbia||34.0|
Source: U.S. Census Bureau