Lewisville is a city in Denton County, Texas in the U.S. state of Texas. As of the 2000 census the city had a total population of 77,737. With strong population growth continuing into the new millennium, the U.S. Census Bureau gives a 2006 population estimate of 94,589. Lewisville is one of the older incorporated cities (incorporated in 1925) in the northern area of the Dallas-Fort Worth Metroplex, but it remained a small rural town with just a few thousand people as late as 1960.

Lewisville's growth is due in part to its proximity to Dallas-Fort Worth International Airport, a few miles to the city's south. Rapid growth continues, though the city has tried to maintain a small-town ambiance. Vista Ridge Mall is an important and expanding shopping center for Lewisville and surrounding communities. Lewisville Lake borders the city to the north, and Lake Grapevine is located near its southern boundary.