Solopaca (Campanian: Surrupaca) is a comune (municipality) in the Province of Benevento in the Italian region Campania, located about 45 kilometres (28 mi) northeast of Naples and about 20 kilometres (12 mi) northwest of Benevento. As of 31 December 2004, it had a population of 4,134 and an area of 31.0 square kilometres (12.0 sq mi).[3]