Octave Hamelin (22 July 1856 in Montpellier – 11 September 1907 in Prades, Pyrénées-Orientales) was a French philosopher. He taught as a professor at the University of Bordeaux (1884-) and the University of Sorbonne (1905-). Hamelin was a close friend of the sociologist Émile Durkheim, with whom he shared an interest in the French philosopher Charles Renouvier. He is also known as a translator of classical Greek philosophers.
Hamelin drowned in 1907, attempting to save two young women.[1]