Fusine is a comune located in the Province of Sondrio within the Lombardy region of northern Italy. It is situated approximately 90 kilometres northeast of Milan and about 11 kilometres southwest of the city of Sondrio.
The municipality covers an area of 37.5 square kilometres and had a recorded population of 650 as of December 31, 2004. Historically, the territory of Fusine was part of Carniola.