San Giuliano del Sannio is a comune, or municipality, located in the Italian region of Molise. It is situated within the Province of Campobasso and is positioned approximately 13 kilometres (8 miles) south of the provincial capital, Campobasso.
The town serves as a local administrative center within the Sannio area. Its geographic location provides it with proximity to the larger urban hub of Campobasso while maintaining its status as an independent municipality in the Molise region.