Belmonte Mezzagno (Sicilian: Bellumunti but more properly U Mizzagnu in the local version of the Sicilian language) is a comune (municipality) in the Metropolitan City of Palermo in the Italian region Sicily, located about 15 kilometres (9 mi) south of Palermo.

Belmonte Mezzagno was founded in 1752, when Prince Giuseppe Emanuele Ventimiglia asked and obtained the "Licentia Populandi" from King Charles III.

The first urban settlement of the country was the "Bagghiu", a large open-air court, where the houses overlooked and was accessed by a large common entrance dominated by an arch placed at the edge of the Spatola torrent, where inhabitants could easily draw water.

[4] In the State Archives of Palermo, there is a request by priest don Nicolo Lo Valvo for compensation for pastoral services in the land of Belmonte prior to its official founding from September 1741 to December 1742.

Benedetto Spera, member of the Sicilian Mafia convicted in absentia of the killings of anti-mafia judges Paolo Borsellino and Giovanni Falcone was born in Belmonte Mezzagno.