Demon could refer to: * Demon, various mythological demons that have been referenced * "Demon" , a Star Trek: Voyager episode It might also refer to: * "Demons of Air and Darkness", name sometimes used to describe the ancient civilization from Iconia * "Demon planet", the nickname for an inhospitable class of planet * "The Demon with the Golden Voice", an ancient Talaxian folktale Episodes * VOY: "Heroes and Demons" * ENT: "Demons" Novels * Pocket TOS: Demons * Pocket DS9: Demons of Air and Darkness de:Dämon fr:Démon