State Route 128 (SR-128) is a one-mile (1.6 km) long route in Tallapoosa County. The route’s western terminus is at a junction with State Route 63. The route ends one mile (1.6 km) later at the entrance to Wind Creek State Park along Lake Martin.

State Route 128 is the signed route to provide access to Wind Creek State Park from State Route 63. The junction of State Routes 63 and 128 is approximately six miles south of Alexander City, where State Route 63 junctions U.S. Highway 280. From SR-63, SR-128 heads east through wooded areas and enters the state park. The route turns east onto Hodnett Drive and ends a short distance later.

The entire route is in Tallapoosa County.