Baden (; ) is a commune in the Morbihan département in Brittany in northwestern France.
Some of the islands of the Gulf of Morbihan fall within the boundaries of the commune. The town is located from Auray and from Vannes.
Inhabitants of Baden are called Badennois in French.
The Passions and Wings museum is devoted to the story of Joseph Le Brix(aviator), who is from the area, it includes a collection of robots and old toys donated by John and Anne Farkas.
The town is twinned with Weilheim in Germany.