Castelvetere in Val Fortore is a comune, or municipality, located in the Campania region of southern Italy. It is situated within the Province of Benevento and is positioned in the upper valley of the Fortore River in the Sannio area.
The town is located approximately 35 kilometers (22 miles) northeast of Benevento and about 90 kilometers (56 miles) northeast of Naples. It serves as a local administrative center within its specific geographic region of the Italian countryside.