Santu Lussurgiu is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 110 km northwest of Cagliari and about 25 km north of Oristano. As of 31 December 2004, it had a population of 2,605 and an area of 99.8 km².

Santu Lussurgiu borders the following municipalities: Abbasanta, Bonarcado, Borore, Cuglieri, Norbello, Paulilatino, Scano di Montiferro, Seneghe.

Near the village of Santulussurgiu are two of the most beautiful wooded location in Sardinia: the Mount San Antonio and San Leonardo. The first is on the way to Macomer Santulussurgiu, is a mountain of 808 m covered with vegetation, there are several species of oak trees and other trees, some over 100 years. On the mountain is a church built by the faithful in 1944 in honor of St. Anthony, on the top there are two statues of the Madonna and another one of San Antonio and an altar to celebrate Mass outdoors. To reach the church must follow the way of the cross strewn with statues representing the Passion of Christ. The town of San Leonardo instead is much closer to Santulussurgiu. It is a small settlement inhabited almost exclusively in summer. People take refuge in this place in search of a cooler climate. This place is famous for Siete Fuentes (in Italian the seven fountains) from which water flows clear and drinkable. Wanting in both places you can make outings and picnics.

Sa Carrela 'e Nanti is a manifestation of the traditional carnival Santulussurgiu,

Sa carrela 'e Nanti is a dirt road scene of a wild and dangerous ride on horseback, called the same way, in which participants, all strictly Lussurgesi and arranged in pairs of two or three riders at a time, challenge each other in skill, proving his mastery equestrian trim during racing, the composure of horses along the tortuous path.

The race held on the last Sunday of Carnival and is repeated on Tuesday, Monday is instead characterized by "Su Lunis pudda a sa" (the Monday of the hen), evidence of ability that is beheaded, on horseback launched gallop, a chicken (once alive, now replaced by a puppet) hanging by a thread in the middle of the path.