Forni Avoltri is a comune in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about 130 kilometres northwest of Trieste and about 70 kilometres northwest of Udine, on the border with Austria. As of 31 December 2004, it had a population of 704 and an area of 80.8 square kilometres. The municipality of Forni Avoltri contains the frazioni of Piani di Luzza, Frassenetto, Sigilletto, Collinetta, and Collina.