The Beaufortain Massif (French: Massif du Beaufortain, pronounced [masif dy bofɔʁtɛ̃]) is a massif of the French Alps that straddles the southeastern departments of Savoie and Haute-Savoie, in the historical region of Savoy.

It is bounded by the Arly river to the northwest, the Bon Nant [fr] to the northeast, as well as the Isère river as it runs through the Tarentaise Valley to the south.

It is also crossed by the Dorinet and Doron de Beaufort [fr] rivers, in addition to their tributaries, from northeast to southwest, at Beaufort level.

It is surrounded by the Aravis Range, the Bauges Range, the Lauzière massif, the Vanoise massif and the Mont-Blanc massif.