Montenars () is a (municipality) in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about northwest of Trieste and about north of Udine. , it had a population of 554 and an area of .
Montenars borders the following municipalities: Artegna, Gemona del Friuli, Lusevera, Magnano in Riviera, Tarcento.
Montenars is twinned with: