Tor Boacciana, Medieval tower in Ostia Antica, Rome, Italy.

Tor Boacciana is a brick tower on the Tiber's right bank about 4 km from the river mouth, on the border between Rome and Fiumicino. Its lower part consists of Roman imperial ruins, probably a 2nd-century lighthouse or watchtower, as brick stamps indicate; the upper section was added around the 12th century. It stands beside the Ponte della Scafa.

The tower's base consists of Roman imperial brickwork, likely the remains of a 2nd-century lighthouse or watchtower linked to Portus, as brick stamps indicate. The upper section was built around the 12th century, possibly the "beautiful but lonely tower" seen by Richard the Lionheart on his way to the Third Crusade. It was restored in 1406 under Innocent VII and in 1420 under Martin V, then served as a papal customs house from 1562 until 1568, when the customs moved to Tor San Michele.

The name likely comes from the Bovazzani family, recorded in the sources as Bobazani, who owned the building; a member named Cencius held a castle nearby, of which the tower is what remains. The nearby bridge is commonly called Ponte della Scafa after the ferryman Tancredi Chiaraluce, who ran a "scafa" crossing between the Tiber banks and lived in the tower, keeping a rest stop there for travellers and hunters.

The tower is reached via Via di Tor Boacciana and sits near Fiumicino Airport and the modern Ponte della Scafa bridge. Visitors should check ahead whether the site is open, as it is sometimes visited as part of guided tours through Ostia Antica.

The tower's name likely comes from the Bovazzani family, who owned it; a member named Cencius held a castle nearby, of which the tower may be the only remnant. In the early 1800s it was rented to the ferryman Tancredi Chiaraluce, who ran a crossing of the Tiber with a "scafa" and set up a refreshment point for travellers and hunters.