State Route 683 (SR 683) is a north–south state highway in the southern portion of the U.S. state of Ohio. The southern terminus of State Route 683 is at a T-intersection with State Route 93 about 0.50 miles (0.80 km) north of Hamden. Its northern terminus is also at a T-intersection, this time with U.S. Route 50 nearly 6 miles (9.7 km) west of McArthur.