Green River Lake is an 8,210-acre reservoir in Adair and Taylor counties in Kentucky lying in the section of Kentucky known as the Highland Rim.

The lake was developed by the United States Army Corps of Engineers in 1969 by impounding the Green River. The dam is an 11-mile drive equidistant from the cities of Campbellsville and Columbia. The lake is located 90 miles southeast of Louisville.

Operated and maintained primarily for flood control, the lake has become the major attraction of Green River Lake State Park.