Nulvi is a comune in the Province of Sassari in the Italian region Sardinia, located about 180 kilometres north of Cagliari and about 20 kilometres northeast of Sassari. It is one of the main centers of the Anglona historical regione. Nulvi borders the following municipalities: Chiaramonti, Laerru, Martis, Osilo, Ploaghe, Sedini, Tergu.