Michel Auguste Croz (22 April 1830 in Le Tour, Chamonix valley - 14 July 1865, on the Matterhorn) was a French mountain guide and the first ascentionist of many mountains in the western Alps during the golden age of alpinism. He is chiefly remembered for his death on the first ascent of the Matterhorn and for his climbing partnership (as a guide) with Edward Whymper.