The US Post Office—Salem Main is a historic post office building at 2 Margin Street in Salem, Massachusetts. It is one of Salem's finest civic Colonial Revival buildings. The two story brick building was built in 1932 to a design by Wenham-based architect Philip Horton Smith of Smith & Walker. Its roof follows a cross-gable plan, with its main entry on the long side of the building, topped by a decorated pedimented gable. First floor windows are round-arched and slightly recessed, while those on the second floor are rectangular. A line of granite marks the transition to the cornice at the top of the facade; the cornice, along with the gable elements, features heavy dentil molding.
The building was listed on the National Register of Historic Places in 1986; it continues to serve as Salem's primary post office.
