Mereto di Tomba is a comune in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about 80 kilometres northwest of Trieste and about 15 kilometres west of Udine. Mereto di Tomba borders the following municipalities: Basiliano, Codroipo, Coseano, Fagagna, San Vito di Fagagna, Sedegliano and Pasian di Prato.