Lewisville Lake, Recreational reservoir in North Texas, United States.

Lewisville Lake is a reservoir in Denton County in North Texas, United States. The water surface includes several wide coves and branching arms, surrounded by shallow shoreline zones and wooded hills.

An initial dam was built in 1927 to supply water to Dallas, before a larger dam was constructed in the 1950s. This expansion greatly increased the water surface and additionally enabled flood control for the growing settlements downstream.

The name comes from the nearby town of Lewisville, which developed during Texas settlement times. Today, local residents regularly use the water for fishing and water sports, with many boats gathering on the open surface on weekends.

Several access roads lead to different shoreline areas, allowing visitors to seek out quieter or busier zones depending on preference. Parking options and launch points are distributed along the entire shoreline, making orientation on-site easier.

Party Cove, near Westlake Park, is where boats tie up side by side in summer so occupants can listen to music and drink; the source places these gatherings in summer, not early summer. The lake also froze over in February 2021, reportedly for the first time since the 1957 breach created it.