The United States Post Office—Beverly Main is a historic post office at 161 Rantoul Street in Beverly, Massachusetts. The single story building was built in 1910 out of sandstone in a Classical Revival style. The front facade has a projecting portico supported by six Doric columns on a granite base, with granite steps leading up to a recessed entrance. The lobby area occupies the front of the main block, and is styled with terrazzo marble. There are one-bay wings on either side of the main block, which house offices. The roofline has an extended overhanging eave, above which is a parapet and a smaller gabled section topped by an octagonal cupola.
The building was listed on the National Register of Historic Places in 1986. The building continues to serve as Beverly's main post office.