State Route 676 (SR 676) is a 26.53-mile (42.70 km) long east–west state highway in the southeastern portion of the U.S. state of Ohio. The western terminus of SR 676 is at a T-intersection with SR 555 approximately 3 miles (4.8 km) southeast of the village of Chesterhill. Its eastern terminus is at a T-intersection with SR 7 in the southwestern portion of the city of Marietta.