WEBLehi (/ ˈ l iː h aɪ / LEE-hy) is a city in Utah County, Utah, United States. The population was 75,907 at the 2020 census, [4] up from 47,407 in 2010, and it is the center of population of Utah. [5] The rapid growth in Lehi is due, in part, to the rapid development of the tech industry region known as Silicon Slopes.