San Vincenzo al Volturno is a historic Benedictine monastery located in the territories of the Comunes of Castel San Vincenzo and Rocchetta a Volturno, in the Province of Isernia, near the source of the river Volturno in Italy. The current monastery, housing a group of 8 benedictin nuns, is located to the east of the river, while the archaeological monastery of the early Middle Ages was located on the west.