Brégnier-Cordon (French pronunciation: [bʁeɲe kɔʁdɔ̃]) is a commune in the Ain department in eastern France.

It is located in a bend of the Rhône on the edge of Savoie (on the southeast) and Isère (on the west).

It borders the communes of Groslée-Saint-Benoît, Prémeyzel, Izieu, Murs-et-Gélignieux, Champagneux, Saint-Genix-les-Villages, Aoste and Les Avenières-Veyrins-Thuellin.

The territory of the commune lies principally in the plain of the Rhône at the foot of the Jura mountains.

The closest motorway is the A43, accessed at the Chimilin–Les Abrets exit a few kilometers south of the commune.