Charles-Eusèbe Dionne (20 July 1846 – 25 January 1925), also known as Charles Eusebe or C. E. Dionne, was a French Canadian naturalist and taxidermist. He is considered the first professional French Canadian ornithologist. Dionne was a self-taught scientist and wrote several books on the natural history of Quebec, including the first field guide to the province's mammal fauna; he was a well-respected scholar and became a fellow of the American Ornithologists' Union.