From the ancient name "Mons Laetus" - "Mons Allegrus"
The old site was abandoned in the 17th century. The name of the town today draws on the original name of the settlement built on the "Susu" hill, also known as Mons Laetus - Mons Allegrus to distinguish the spot from the swampy land below. For centuries the peasants lived on the hill, until the pirate raids came to an end, making life below the hill as safe as up above. The present village goes back to the 17th century when it became a feud of the Gioeni family of the Princes of Petrulla, who later were privileged with the title of Dukes of Angiò.
Today very little remains of the old houses in the village, while the ruins of the original town can still be seen on the hilltop and are lit up at night, with a fairytale effect. The place stands between the Torre Salsa wildlife reserve and that of the Platani river mouth, and offers visitors clean sea close by, rich and varied nature, real oases of calmness and tranquillity. Even today the economy is based on agriculture, with important cultivations of citrus, olives and almonds. The territory of Montallegro is included in the production zone of the D.O.P. Ribera orange, and in that of the D.O.P. Raffadali pistachio.