Lake Livingston is a reservoir located in Piney Woods in Houston, Madison, Polk, San Jacinto, Trinity and Walker counties in east Texas, United States.

Lake Livingston was built and is owned and operated by the Trinity River Authority (TRA) of Texas under contract with the City of Houston for water-supply purposes.

Water stored in the lake is used to supply industrial, municipal, and agricultural needs in the lower Trinity River Basin and the Houston/Galveston metropolitan area.

Thomas Hydroelectric Project, which generates electricity by utilizing the power of water flowing from Lake Livingston to the Trinity River below the dam.

[2] Lake Livingston has a surface area of 83,000 acres (360 km2) and impounds 1,750,000 acre-feet (2.16 km3) of water at its normal pool elevation of 131 feet (40 m) above mean sea level.

On September 23, 2005, rain and winds from Hurricane Rita caused waves up to 4 feet (1.2 m) in height to pound against the Lake Livingston dam.

Work was largely completed by April 28, 2006, but due to severe drought, the lake's regular pool level was not reached until November, 2006.