Baia de Arieș (Hungarian: Aranyosbánya or Offenbánya; German: Offenburg) is a town in Alba County, Romania.

It administers five villages: Brăzești (Berzesd), Cioara de Sus (Felsőcsóra), Muncelu (Muncsal), Sartăș (Szártos), and Simulești.

With a population of 3,035 in 2021, it was until 2004 a mining centre extracting, mainly for base metals but also arsenopyrite and pyrite-rich concentrate containing gold.

Baia de Arieș's tourist objectives are the monument of nature tree known as the "Emperor's beech" and the Muncel Monastery.

At the 2021 census, Baia de Arieș had a population of 3,035.