Gédéon Auguste Foulquier (8 August 1855 – 1941), was a French entomologist who specialised in Lepidoptera. He wrote with Charles Oberthür Catalogue raisonné des Lepidoptères des Bouches-du-Rhône (principalement des environs de Marseille et d'Aix). Premier partie, Rhopalocères. Marseille : Librairie Ruat, 1899.
Gédéon Foulquier was born in Pamiers, Gard,[1] the son of Auguste Foulguier and Émilie Puechmary. He lived in Marseille.[2] His collection is held by Musée Pyrénéen in Lourdes.