Genma () may refer to:
Literature Genma Taisen (幻魔大戦), a science fiction manga series that began in 1967
Characters Genma (Onimusha), recurring enemies and race of monsters in the Onimusha video game series Genma (Ranma ½) (早乙女 玄馬), a character in the anime and manga series Ranma ½ Genma, a character in the Battle Arena Toshinden fighting game series Himuro Genma, the main villain from the Ninja Scroll movie Genma Shiranui, a character in the anime and manga series Naruto Genma Kannagi, a character in the light novel and anime series Kaze no Stigma