Duronia is a comune (municipality) in the Province of Campobasso in the Italian region Molise, located about northwest of Campobasso. As of 31 December 2004, it had a population of 473 and an area of .
Duronia borders the following municipalities: Bagnoli del Trigno, Civitanova del Sannio, Frosolone, Molise, Pietracupa, Torella del Sannio.