The Provincetown Post Office is located at 217 Commercial Street in Provincetown, Massachusetts. It is located in a -story brick building that was built in 1930. The main facade has a loggia-style arcade of three arches on the first level, leading to a recessed entrance. The second story has three large windows across, and the gable end has an oculus window and dentil moulding. The building is crowned by a cupola.
The building was listed on the National Register of Historic Places in 1987.