Baden, unofficially distinguished from other Badens as Baden bei Wien, is a spa town in Austria. It serves as the capital of Baden District in the state of Lower Austria. Located about 26 km south of Vienna, the municipality consists of cadastral areas Baden, Braiten, Gamingerhof, Leesdorf, Mitterberg, Rauhenstein, and Weikersdorf.
In 2021, the town became part of the transnational UNESCO World Heritage Site under the name "Great Spa Towns of Europe" because of its famous medicinal springs and its architectural testimony to the international spa culture on the 18th and 19th centuries.