South Carolina Highway 79 (SC 79) is a primary state highway in the U.S. state of South Carolina. It connects communities in western Marlboro County.

SC 79 is a two-lane rural highway, traversing 9.2 miles (14.8 km) from SC 9 to the North Carolina state line.

Originally established in 1937 as a new primary route, it connected US 78, in Denmark, to Voorhees College. In 1938, it was replaced by SC 68, which later became a secondary road by 1948.

The current SC 79 was established in 1938 as a renumbering of part of SC 38, from Bennettsville to the North Carolina state line. Between 1967-70, SC 79 was rerouted and replaced SC 383 to SC 9; the old alignment became SC 385.

Established in 1936 or 1937 as a new primary routing; it went from SC 9 to SC 79. It was renumbered as part of SC 79 by 1970.

The entire route is in Marlboro County.