Ales (Sardinian: Abas) is a town and comune (municipality) in the Province of Oristano in the autonomous region of Sardinia in Italy. It lies on the eastern slopes of Mount Arci. It has 1,229.

This area is the only Sardinian source of obsidian.

As of 2026, the population is 1,229, of which 50.9% are male, and 49.1% are female. Minors make up 8.4% of the population, and seniors make up 35.2%.

As of 2025, of the known countries of birth of 1,242 residents, the most numerous are: Italy (1,216 – 97.9%), Germany (8 – 0.6%).

Together with the town of Terralba, Ales forms the Roman Catholic diocese of Ales-Terralba. The cathedral of Ales, dedicated to Saint Peter, is the bishop's seat. Its current bishop, since 10 February 2016, is Roberto Carboni, O.F.M. Conv.

Antonio Gramsci and Fernando Atzori were born in Ales. The nearest international airport is in Cagliari, at roughly 70 kilometres (43 mi) distance.