State Route 13 is a north–south state highway in the northern and southeastern portion of the U.S. state of Ohio. Its southern terminus is at State Route 550 near Athens, and its northern terminus is at U.S. Route 6 in Huron.Route 13 arises in Dover Township, Athens County, Ohio at Ohio State Route 550 at its junction with US Route 33. It travels west to the heart of Chauncey, Ohio, then turns north at its junction with Ohio State Route 682.