Arba is a comune (municipality) in the Regional decentralization entity of Pordenone, in the Italian region of Friuli-Venezia Giulia. It is located in the northeastern part of Italy.
The municipality lies about 100 kilometres (62 mi) northwest of Trieste, the regional capital, and about 25 kilometres (16 mi) northeast of Pordenone, the administrative centre of its decentralization entity.