State Route 457 (SR 457) is a short four-lane divided highway that was recently built in Gibson County, Tennessee that functions as a southwest bypass of Trenton.

The highway is designated as a primary state route throughout its length with a 55 mph (89 km/h) speed limit and no access control.

Northbound US 45W picks up at the south end of SR 457 and continues to form the eastern bypass of Trenton.

Past this intersection, the roadway continues west as a limited access four-lane divided highway with a 65 mph (105 km/h) speed limit designated as SR 104.

The entire route is in Gibson County.