states that have the youngest population
Utah has youngest population in U.S. Published: Aug. 14, 2008 12:00 a.m. Once again, new census estimates peg Utah's population as the youngest among the states. And Utah is also home to eight of the 50 youngest-population counties in America (out of more than 3,100 counties nationwide). Estimates say that nearly a third of Utah's residents are under age 18, and one of every 10 residents is under age 5 â both tops in America.