Aglientu is a comune in the Province of Sassari in the Italian region Sardinia, located about 210 kilometres north of Cagliari and about 35 kilometres northwest of Olbia. Aglientu borders the following municipalities: Aggius, Luogosanto, Santa Teresa Gallura, Tempio Pausania, Trinità d'Agultu e Vignola. In 2005 Aglientu hosted the Kitesurf World Cup. It is home to the Festa del Turista.