Lauco (Friulian: Lauc) is a comune (municipality) in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about 110 kilometres (68 mi) northwest of Trieste and about 45 kilometres (28 mi) northwest of Udine.

Lauco borders the following municipalities: Ovaro, Raveo, Sutrio, Tolmezzo, Villa Santina, Zuglio.