South Carolina Highway 174 (SC 174) is a 25.730-mile (41.408 km) state highway, connecting Edisto Beach with the western part of the Charleston area, in the southeastern part of the U.S. state of South Carolina.

In 2009, the U.S. Department of Transportation declared that a 17-mile (27 km) stretch of SC 174 on Edisto Island would be designated as a National Scenic Byway.

[3] According to the South Carolina Department of Transportation (SCDOT), the southern terminus is at the southern terminus of Yacht Club Road, where Palmetto Boulevard changes name to Dock Site Road.

As the highway runs across Edisto Island, it travels under an ancient live oak canopy and past small homes, prayer chapels, churches, and country stores and serves as the primary spine road for the island, with smaller country roads and lanes intersecting it and leading to more distant areas of the island.

Continuing north, SC 174 crosses the CSX Railway just before its northern terminus, an intersection with US 17 in the unincorporated community of Osborn.