Santa Maria Coghinas (Gallurese: Cuzina, ) is a comune (municipality) in the Province of Sassari in the Italian region Sardinia, located about 190 km north of Cagliari and about 35 km northeast of Sassari, in the Anglona traditional region, on the banks of Coghinas river. Santa Maria Coghinas borders the following municipalities: Bortigiadas, Bulzi, Perfugas, Sedini, Valledoria, Viddalba. It is known since the early 11th century as part of the giudicato of Torres. It is an autonomous commune since 1983. Sights include the Doria castle and the Romanesque-Gothic church of Madonna delle Grazie.