Aix-les-Bains, locally simply Aix, is a commune in the southeastern French department of Savoie.
Situated on the shore of the largest natural lake of glacial origin in France, the Lac du Bourget, this resort is a major spa town; it has the largest freshwater marina in France. It is the second largest city in Savoy in terms of population, with a population of 29,993 as of 2018. It is part of the Chambéry urban area.
A leading town of the Belle Époque, of international renown, Aix-les-Bains was a vacation destination for nobility and the wealthy. Although the thermal baths are no longer the main attraction in Aix, the area continues to be draw visitors for water sports and activities. The town has partially compensated for the loss of visitors coming for spa treatments by developing tourism. It hosts up to 200,000 general visitors annually, between tourists and people seeking mineral bath therapy. It is also an industrial city, with a few large companies such as Alstom, the headquarters of the Léon Grosse companies, ABB Cellier, Aixam, as well as a high-quality leather goods factory.
In addition to thermal baths and tourism, Aix-les-Bains is known for its national Musilac festival.