Oschiri (Gallurese: Óscari, Sardinian: Óscheri) is a comune (municipality) and former bishopric in the Province of Sassari in the Italian region Sardinia, located about 170km north of Cagliari and about 40km southwest of Olbia. As of 31 December 2004, it had a population of 3,696 and an area of 215.5km2. The municipality of Oschiri contains the frazione (subdivision) San Leonardo. Oschiri borders the following municipalities: Alà dei Sardi, Berchidda, Buddusò, Ozieri, Pattada, Tempio Pausania, Tula.