The Province of Campobasso (Italian: Provincia di Campobasso; Molisan dialect: Pruìnge de Cambuàsce; Molise Croatian dialect: ?) is a province in the Molise region of Italy. Its capital is the city of Campobasso.

It has an area of 2,909 km², and a total population of 230,692 (2001). There are 84 comunes (Italian: comuni) in the province: Comunes of the Province of Campobasso.

The eastern part of the province is home to a small Croatian minority who speak a unique archaic dialect of the Croatian language.