Collalto Sabino () is a (municipality) in the Province of Rieti in the Italian region of Latium, located about northeast of Rome and about southeast of Rieti. It is one of I Borghi più belli d'Italia ("The most beautiful villages of Italy").
Collalto Sabino borders the following municipalities: Carsoli, Collegiove, Marcetelli, Nespolo, Pescorocchiano, Turania. It is located near the Lake Turano. It is home to a baronial Castle, which was owned by the Savelli, Strozzi, Soderini and, from 1641, by the Barberini families. The town is surrounded by a 15th-century line of walls.
Among the sites to the town are Palazzo Latini and the small church of Madonna della Speranza.