Georg Semper (3 August 1837, Altona, Hamburg – 21 February 1909) was a German entomologist who specialised in Lepidoptera.
His Philippine Lepidoptera are in Senckenberg Museum, Frankfurt am Main and his Indomalaya and Australasia specimens are in Staatliches Museum für Tierkunde Dresden. His European insects are in Museum Schleswig-Holstein, Landesk and in the zoological collections of the University of Hamburg. He wrote Beitrag zur Rhopalocerenfauna von Australien. J. Mus. Godeffroy 14: 138-194, pls 8, 9 (1878) and Die Schmetterlinge der Philippinischen Inseln. Beitrage zur Indo-Malayischen Lepidopteren-fauna. Zweiter Band. Die Nachtfalter. Heterocera Reisen Archipel. Philipp. 2: 381-728 (1896–1902). He worked in association with Museum Godeffroy.