 Filignano is located west of Campobasso, southwest of Isernia, north of Venafro, and east of Cassino.It is a hill town surrounded by the Mainarde mountain range, in the Abruzzo, Lazio and Molise National Park.The municipal territory, bordering with the region of Lazio and not too far from Campania, borders with the municipalities of Acquafondata (FR), Colli a Volturno, Montaquila, Pozzilli, Rocchetta a Volturno, Scapoli, and Vallerotonda (FR).