The Grand Cornier is a mountain in the Pennine Alps in Switzerland. It lies north from the Dent Blanche.
The first ascent of the mountain was made via the east ridge by Edward Whymper, Christian Almer, Michel Croz and F. Biner on 16 June 1865.
The Mountet hut () and Moiry hut () are used for the normal ascent routes.
Collomb, Robin G., Pennine Alps Central, London: Alpine Club, 1975