Mazzano Romano is a comune (municipality) in the Metropolitan City of Rome in the Italian region of Latium, located about 35 km north of Rome. Mazzano Romano borders the following municipalities: Calcata, Campagnano di Roma, Castel Sant'Elia, Faleria, Magliano Romano, Nepi. First mentioned in 945, it is one of the villages that formed from the great estate assembled by Pope Adrian I about 780, his Domusculta Capracorum. It includes the Regional Park of Veii.