Perdaxius is a town and comune located in the Province of Sulcis Iglesiente within the autonomous island region of Sardinia, Italy. The municipality is situated approximately 45 kilometres (28 mi) west of the capital city of Cagliari and about 9 kilometres (6 mi) east of Carbonia.
The town has a population of 1,276 inhabitants. It serves as a local administrative center within its specific geographic region of the island.