United States Post Office–Millbury Main

The US Post Office-Millbury Main is an historic building on 119 Elm Street in Millbury, Massachusetts. The single-story brick building was built in 1941, and has styling with Art Deco features. It has a cupola with diamond-glass windows and a copper roof; the diamond window pattern also appears in the windows that flank and top the building's entrance. The interior retains much of its original woodwork and styling, and includes a mural painted by Joe Lasker depicting a battle between Native Americans and English colonists.

The post office was listed on the National Register of Historic Places in 1987.