Sennori (Sardinian: Sènnaru) is a comune (municipality) in the Metropolitan City of Sassari in the Italian region Sardinia, located about 180 kilometres (110 mi) north of Cagliari and about 7 kilometres (4 mi) northeast of Sassari. As of 31 December 2004, it had a population of 7,298 and an area of 31.4 square kilometres (12.1 sq mi).

Sennori borders the following municipalities: Osilo, Sassari, Sorso, Tergu.