Bagnaria Arsa (Friulian:Bagnarie) is a comune (municipality) in the Province of Udine in the Italian region Friuli-Venezia Giulia, located about 50 kilometres (31mi) northwest of Trieste and about 20 kilometres (12mi) south of Udine. As of 31 December 2004, it had a population of 3,491 and an area of 19.1 square kilometres (7.4sqmi).