The Torre del Mangia is a tower in Siena, in the Tuscany region of Italy. Built in 1338-1348, it is located in the Piazza del Campo, Siena's premier square, adjacent to the Palazzo Pubblico (Town Hall). When built it was one of the tallest secular towers in mediaeval Italy. At 88 m, it is now second only to Cremona's Torrazzo.
The name (meaning "Tower of the Eater") derives from its first guardian, Giovanni di Balduccio, nicknamed Mangiaguadagni for his tendency to spend all his money on food.
The upper part was realized by Agostino di Giovanni under design by one Mastro Lippo pittore, probably identifiable with Lippo Memmi.