Utah has the third highest number of millennial’s in the country with 23.6 percent of the state's population between the ages of 20 and 34. The national average is 20.6 percent.
Utah's youthful population will continue for years to come, as 30.5 percent of the state's population is under the age of 18 while the national average is 22.9 percent. Utah also has the highest percentage of school-age children and children under 5 in the nation. By 2065, the number of Utahns is expected to grow from its current size of 3 million to 5.5 million.
Source: Business in Utah – Business Elevated Guide