Corno di Rosazzo is a comune, or municipality, located in the Friuli-Venezia Giulia region of northeastern Italy. It falls within the regional decentralization entity of Udine and is situated approximately 20 kilometres southeast of the city of Udine and about 45 kilometres northwest of Trieste.
The municipality covers a total area of 12.5 square kilometres. As of December 31, 2004, the population of Corno di Rosazzo was recorded at 3,313 residents.