The Williams River Route 5 Bridge is a historic Warren deck truss bridge, carrying U.S. Route 5 (US 5) across the Williams River in Rockingham, Vermont.

Built in 1929 and rebuilt in 1971-72, it is one of four bridges of this type and vintage in the state.

It was listed on the National Register of Historic Places in 1991.

The main span is a Warren deck truss, mounted on concrete abutments, with an I-beam sub-floor and concrete road bed set on top of the truss structure.

It is one of only four Warren deck trusses built at the time, serving on what was one of the state's major travel arteries prior to the construction of Interstate 91.