Osoppo (Friulian: Osôf) is a comune (municipality) in the Province of Udine in the Italian region Friuli-Venezia Giulia, located about 90 kilometres (56 mi) northwest of Trieste and about 25 kilometres (16 mi) northwest of Udine. As of 31 December 2004, it had a population of 2,973 and an area of 22.2 square kilometres (8.6 sq mi).