The US Post Office—South Hadley Main is a historic post office at 1 Hadley Street in South Hadley, Massachusetts. The single story Classical Revival building was constructed in 1940, and occupies a prominent position facing South Hadley's common. Its facade is relatively plain, fronted by a series of limestone columns and topped by a limestone entablature, which extends around the top of the building. The walls are predominantly brick, laid on a granite foundation, with granite steps leading to the main entrance. Despite modernization in the 1960s the interior has maintained some of its original features, including marble wainscoting and some woodwoork.The building was listed on the National Register of Historic Places in 1986.
