Nurachi is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 100 kilometres (62 mi) northwest of Cagliari and about 9 kilometres (6 mi) northwest of Oristano. As of 31 December 2004, it had a population of 1,671 and an area of 15.9 square kilometres (6.1 sq mi).[3]