Lusia is a comune (municipality) in the Province of Rovigo in the Italian region Veneto, located about 60 km southwest of Venice and about 10 km northwest of Rovigo. As of 31 December 2004, it had a population of 3,623 and an area of 17.7 km2. The municipality of Lusia contains the frazioni (subdivisions, mainly villages and hamlets) Alberone, Arzaron, Bornio, Ca'Morosini, Cavazzana, Ceresolo-Santa Lucia, Contra' Nova, Garzare, Giare, Marasso, Pioppello, and Saline. Lusia borders the following municipalities: Barbona, Lendinara, Rovigo, Sant'Urbano, Villanova del Ghebbo.

Demographic evolution