Mont Mallet (3,989 metres (13,087 ft)) is a mountain in the Mont Blanc massif in Haute-Savoie, France. It lies on a spur running northwards from the French-Italian frontier ridge, and can be most easily reached from the Aiguille de Rochefort.

Mont Mallet was first climbed on 4 September 1871. The first ascension party consisted of Leslie Stephen, Gabriel Loppé, F. Wallroth, Melchior Anderegg, Cachet and A. Tournier. They reached it via its southern ridge, a route now graded on the French adjectival climbing scale as PD. Its north ridge (graded AD) was first climbed in 1882.