South Carolina Highway 315 (SC 315) is a 6.067-mile (9.764 km) state highway, serving as a more direct route between Savannah, Georgia and several Lowcountry communities in the U.S. state of South Carolina through southern Jasper County.

[citation needed] The route, known for the entire length as South Okatie Highway,[2] also serves the unincorporated community of Levy.

The route travels generally in a south to north direction and is a two-lane road for the entire length.

SC 315 begins about five miles north of the Georgia state line at a flashing light intersection with U.S. Highway 17.

SC 315 travels in a northeastern direction for two miles before veering toward a more northerly path.