San Teodoro is a comune in the Province of Sassari in the Italian region Sardinia, located about 180 kilometres northeast of Cagliari and about 20 kilometres southeast of Olbia. As of 31 December 2004, it had a population of 3,565 and an area of 104.8 square kilometres. The municipality of San Teodoro contains several frazioni, among which: La Suarédda, Monti Pitrosu, Straula, Budditogliu, La Traversa, Lu Fraili, and Lu Sitagliacciu.