U.S. Route 17 Alternate

U.S. Highway 17 Alternate
U.S. Highway 17 Alternate
	Route of US 17 Alt. in South Carolina highlighted in red
Route information
	Auxiliary route of US 17
	Maintained by SCDOT
Length	123.900 mi (199.398 km)
Existed	1951–present
Major junctions
South end	US 17 / US 21 near Pocotaligo
	US 15 in Walterboro; US 78 in Summerville; I-26 in Summerville; US 176 in Summerville; US 52 in Moncks Corner; US 521 in Sampit;
North end	US 17 / US 701 in Georgetown
Location
Country	United States
State	South Carolina
Counties	Beaufort, Hampton, Colleton, Dorchester, Berkeley, Williamsburg, Georgetown
Highway system
	United States Numbered Highway System; List; Special; Divided; South Carolina State Highway System; Interstate; US; State; Scenic;

U.S. Highway 17 Alternate (US 17 Alt.) is a 123.9-mile (199.4 km) alternate route of US 17 in South Carolina that travels between Pocotaligo and Georgetown. It has been four-laned in various segments since 1970.