Eugène Jacob de Cordemoy (1835 in Saint-André, Réunion – 25 April 1911 in Hellbourg, Salazie, Réunion) was French physician and botanist.
He had a particular interest in orchids, continuing the work of Charles Frappier.
He is the author of Flore de l'île de la Réunion (English: Flora of the island of Réunion) published in 1895.