Auguste Jaccard (6 July 1833, in Culliairy near Sainte-Croix – 5 January 1895, in Le Locle) was a Swiss geologist and paleontologist. His scientific research, for the most part, was associated with the Jura Mountains. In around 1845, he moved with his father to Le Locle, where the elder Jaccard opened a guilloché workshop that was later managed by his son. As a geologist, Auguste Jaccard was self-taught, having Oswald Heer and Pierre Jean Édouard Desor as important influences to his career. In 1856 he released his first publication, a treatise on fossils found in the basin of Le Locle.