Castello di Cimbergo, Medieval castle in Cimbergo, Italy.

Castello di Cimbergo stands on a rock spur in the centre of the village, above the valley of the Re stream. Its irregular pentagonal plan dates from the 12th–13th century. Part of the ruins was reused in the 19th century to build the village bell tower.

The castle dates to the 12th–13th century and was originally held by the Antonioli family, then briefly by the Federici and finally by the counts of Lodrone from Trentino, who sold it to the vicinia of Cimbergo. It stood at the centre of numerous clashes between the Guelphs and Ghibellines of Camunia. In the 19th century part of the ruins was reused in building the village bell tower.

The castle's name comes from Cimbergo, the village in the Camonica Valley where it stands. After the Lodrone counts sold it to the vicinia, the local community assembly, the ruins passed into communal hands, and part of the stone was reused in the 19th-century village bell tower.

The ruins stand on a rock spur in the centre of Cimbergo, above the Re stream valley, reached on foot through the village lanes. The ground around the walls is uneven and there are no visitor facilities, so wear sturdy shoes and allow time to walk up from the village.

Part of the castle's ruins were reused in the 19th century to build Cimbergo's bell tower, so stones from the medieval walls stand in the village campanile. The pentagonal layout is irregular because the builders followed the shape of the rock spur above the Re stream.