State Route 775 (SR 775) is a 31.49-mile-long (50.68 km) north–south state route in the southern portion of the U.S. state of Ohio. Its southern terminus is on the East Huntington Bridge with the unmarked West Virginia Route 106 south of Proctorville, and its northern terminus is at SR 141 nearly 7 miles (11 km) west of Gallipolis. Most of the route is a rural two-lane highway and passes through woodland. The same of its path, SR 775, passing through the Wayne National Forest. The route was commissioned in the mid-1930s and the highway was paved by the late 1950s. The route was extended in the mid-2000s, to its current southern terminus.