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.

The Army Corps of Engineers started construction of a dam in 1964 and Green River Lake State Park opened in 1969. With 1,331 acres of land along with the 8,200-acre lake. The park has many attractions for those who love nature and wish to experience the beauty that is found in the Campbellsville, Kentucky area.

Park options include an 18-hole miniature golf course, hiking trails, a beach, picnic area, and a playground. The lake's marina has a restaurant, boat slips, and rentals for different types of boats. The lake abounds in bass, bluegill, catfish, and crappie.