Santu Lussurgiu borders the following municipalities: Abbasanta, Bonarcado, Borore, Cuglieri, Norbello, Paulilatino, Scano di Montiferro, Seneghe.
Paulilatino borders the following municipalities: Abbasanta, Bauladu, Bonarcado, Fordongianus, Ghilarza, Santu Lussurgiu, Solarussa, Villanova Truschedu, Zerfaliu.