Léon Auguste Ottin was a portrait and genre painter. He was the son of Auguste Ottin.
Ottin was a student of Paul Delaroche and met Henri Fantin-Latour while they were both studying under Horace Lecoq de Boisbaudran, in Paris, in 1851. He exhibited at the Salon from 1861-1882.
Bénezit, E, Dictionnaire critique et documentaire de Peintres, Sculpteurs, Dessinateurs et Graveurs, France, 1960; Druick, Douglas and Michel Hoog, Fantin-Latour, Paris, 1982.