Bellegarde-sur-Valserine (French pronunciation: [bɛlɡaʁd syʁ valsəʁin], literally Bellegarde on Valserine; Arpitan: Bèlagouârda) is a former commune in the Ain department in the Auvergne-Rhône-Alpes region in Eastern France.

A smaller, similar feature, the Pertes de la Valserine, on the former border with Lancrans, is still visible.

Bellegarde lies in a valley dominated by the Plateau of Retord on the west and the massif of the Grand Crêt d'Eau and the Vuache on the east.

The passage created by the Rhône is the principal access to the area around Gex and the north of Lake Geneva.

Bellegarde station has rail connections to Paris, Lyon, Annemasse, Geneva, Chambéry and several regional destinations.