thumb | right | alt=Railway bridge near Campolieto-Monacilioni's train station. | Railway bridge near Campolieto-Monacilioni's train station.
Monacilioni is a small town in the province of Campobasso, Molise, southern Italy, located northeast of Campobasso.
Monacilioni was originally shaped in a circular fashion with one main intersecting street. During the latter half of the 20th century, a significant portion of the town was destroyed in a series of landslides.