San Martino al Tagliamento (; ) is a (municipality) in the Regional decentralization entity of Pordenone in the Italian region of Friuli-Venezia Giulia, located about northwest of Trieste and about northeast of Pordenone.
San Martino al Tagliamento borders the following municipalities: Arzene, San Giorgio della Richinvelda, Sedegliano, Valvasone.