South Carolina Highway 128 (SC 128), is a 2.110-mile (3.396 km) state highway located entirely within Beaufort County, South Carolina.

Also known locally as Savannah Highway, SC 128 serves as a principal arterial for the unincorporated Shell Point as well as providing a southern route serving Port Royal,[3] Marine Corps Recruit Depot Parris Island, and the Sea Islands east of Beaufort.

SC 128 travels in a west-to-east direction and is a four-lane road for the entirety of its path.

It alternates between traveling through the census-designated place of Shell Point and the town of Port Royal.

[2] The entire route is in Port Royal, Beaufort County.