The US Post Office-Lexington Main is an historic post office at 1661 Massachusetts Avenue in Lexington, Massachusetts. The single story brick Georgian Revival building was built in 1937 as part of a Depression era works program. The building has fairly modest styling: it has a belfry and cupola, and its entry is flanked by fluted engaged columns, and topped by a simple entablature, and an eagle set in a carved recess. The interior has marble terrazzo flooring, and marble wainscoting below otherwise plaster walls.The building was listed on the National Register of Historic Places in 1986.
