Prepotto (; ) is a (municipality) in the Regional decentralization entity of Udine in the Italian region of Friuli-Venezia Giulia, located about northwest of Trieste and about east of Udine, on the border with Slovenia. , it had a population of 894 and an area of .
Prepotto borders the following municipalities: Brda (Slovenia), Kanal ob SoÃÂi (Slovenia), Cividale del Friuli, Corno di Rosazzo, Dolegna del Collio, San Leonardo, San Pietro al Natisone, Stregna.