Monteleone was said to have been founded around the year 250 by a Tiberto degli Arroni. The settlement was later fortified by the
Spoletans, who surrounded it with walls and restored its fortress. In 1527 the town was directly occupied by Spoleto, and a military garrison was installed. In the early 1540s it was incorporated into the Governorate of Norcia, Cascia, Cerreto and Monteleone, and a
podestà-commissario was appointed. Between the 1540s and 1560 a succession of podestà, commissari and luogotenenti governed the community, appointed either by the pope or by the papal legate of Perugia. Between 1560 and 1565 new municipal statutes were compiled. In 1569, under
Pope Pius V, the
Prefettura della Montagna was established. During the
Roman Republic of 1798 the town was assigned to the Canton of Cascia in the . After the fall of the Republic, the traditional magistracy of priori was reinstated and a vice governor appointed. In 1802 the town was reintegrated into the
Prefettura della Montagna. From 1809 to 1814, under French rule, a maire was introduced. The town was assigned to the Canton of Cascia, within the Circondario of Spoleto in the
Department of Trasimeno. Following the collapse of Napoleonic authority in 1814, a provisional regency was established, and in 1815 the offices of luogotenente and priori were restored. On 6 July 1816 the town was included in the Delegation of Spoleto. In 1833 the town became dependent on the Governor of Cascia, and the office of podestà ceased to be present locally. In 1859 the municipality had a total population of 1,662 inhabitants. Of these, 270 people lived in the countryside, while the main settlement of Monte Leone contained 915 inhabitants. The remainder lived in three hamlets, which also served as parishes: Buttine (183 inhabitants), Ruscio (348 inhabitants), and Trivio (216 inhabitants). == Geography ==