Aglientu () is a town and comune (municipality) in the Province of Gallura North-East Sardinia in the autonomous region of Sardinia in Italy, located about north of Cagliari and about northwest of Olbia. It has inhabitants.
Aglientu borders the municipalities of Aggius, Luogosanto, Santa Teresa Gallura, Tempio Pausania, and TrinitÃÂ d'Agultu e Vignola.
In 2005 Aglientu hosted the Kitesurf World Cup. It is home to the Festa del Turista ("Tourist's Feast").