Texas State Highway 178

State Highway 178 (SH 178) is a Texas state highway in the city of El Paso in El Paso County maintained by the Texas Department of Transportation (TxDOT). The 3.0-mile (4.8 km) route designated in 1991 connects New Mexico State Road 136 at the New Mexico state line between El Paso and Santa Teresa, New Mexico, to a freeway carrying Interstate 10, U.S. Route 85, and U.S. Route 180 on the west side of El Paso. The route together with NM 136 is a major urban roadway connecting an international border crossing with I-10. The route also has an important intersection with SH 20.

The route's numerical designation was previously assigned to a road in the Texas Panhandle during the 1930s. An extension to the current route potentially doubling its length was considered and rejected in recent years.