Iglesias (Italian pronunciation: [iˈɡlɛːzjas], locally [iˈɡlezjas] ; from Spanish: [iˈɣlesjas]; Sardinian: Igrèsias) is a town and municipality, as well as the co-capital (along with Carbonia) of the Province of Sulcis Iglesiente in the autonomous island region of Sardinia in Italy. As of 2025, with a population of 24,634, it is also the 2nd-largest town in the province and the 11th-largest in Sardinia.
Under Aragonese and Spanish control Iglesias was one of the most important royal cities on Sardinia (which depended directly on the king), and it is the seat of the Roman Catholic Diocese of Iglesias. At an elevation of 190 metres (620 ft) in the hills of southwestern Sardinia, it was the centre of a mining district from which lead, zinc, and silver were extracted. Iglesias was also a centre for the distillation of sulfuric acid.
