Léon Robin (Nantes, 17 January 1866 – July 1947) was a French philosopher and scholar of Greek philosophy, professor of history of ancient philosophy at the Sorbonne from 1924 to 1936.
Robin, the son of a merchant, began teaching in the Faculty of Letters at Paris in 1913. In 1924 he took up the chair of history of ancient philosophy, which had lapsed after the death of Louis Rodier in 1913. In 1927 he was visiting professor at the University of Pennsylvania. On his retirement from the Paris chair, his successor was Pierre-Maxime Schuhl. Robin subsequently served as Director of the International Institute of Philosophy.