Montefiascone is a town and comune of the province of Viterbo, in Lazio, central Italy.

It stands on a hill on the southeast side of Lake Bolsena, about 100 km (60 mi) north of Rome.

It was suggested that Montefiascone occupies the site of the Etruscan Temple called Fanum Voltumnae, at which the representatives of the twelve chief cities of Etruria met in the days of their independence.

In the following two centuries, as a Papal possession, Montefiascone lived its period of highest splendour.

During Avignon Papacy, it was the main residence of the Papal legate Cardinal Albornoz.