Bulzi (Sardinian:Bultzi) is a comune (municipality) in the Province of Sassari in the Italian region Sardinia, located about 180 kilometres (110mi) north of Cagliari and about 25 kilometres (16mi) northeast of Sassari. As of 31 December 2004, it had a population of 614 and an area of 21.6 square kilometres (8.3sqmi).