Acquasparta is a town and comune in the province of Terni (Umbria, central Italy). It is located on a hill above the Naia Valley and the river of the same name, facing the Monti Martani mountain range.

Acquasparta is one of I Borghi più belli d'Italia ("The most beautiful villages of Italy"). It also sits between two hot springs, the Amerino and the Furapane.

In the 19th century Adone Palmieri derived the name Acquasparta from acqua sparsa ("scattered water"), referring either to its position on a low hill in a valley watered by the Naia stream.

During the ancient Roman domination the area was a retreat – a spa whose mineralized hot water baths were easily accessible from Rome along the west branch of the via Flaminia.^{[citation needed]} Thermal baths remain open to the public today.

The first reliable evidence for the existence of a settled nucleus at Acquasparta dates to the end of the 10th century. At the time, the territory of Acquasparta formed part of the Terre Arnolfe, lands between Spoleto, Todi and Terni granted by Otto I to Count Arnolf. At an unspecified date it was then subject to the Abbey of Farfa.

By the end of the 12th century the area was ruled by the descendants of Arnolf, known as the Bentivenga family, also referred to as the nobles of Acquasparta. In 1233 the settlement was subjugated by Todi, under whose jurisdiction it remained from the 13th to the 15th century.

On 8 August 1489 it was granted the status of terra franca (free land) by Pope Innocent VIII, implying a degree of local autonomy.

Around 1500, during factional conflicts within Todi, Acquasparta was occupied by one faction and attacked by Altobello da Chiaravalle. The intervention of Pope Alexander VI, supported by leading mercenary captains, led to the destruction of the castle, the capture of Altobello, and the reintegration of the territory into the former Terre Arnolfe. On 10 March 1507 Pope Julius II visited the town, which was still experiencing shortages of food and basic goods as a consequence of those events.