The Martin Empire (マルタン帝国, Marutan Teikoku?) is a fictional group of villains in the Japanese version of the Yu-Gi-Oh! GX anime series, appearing between episodes 106-130. The English dub does not name this group.
The Martin Empire's members serve as the main antagonists of first half of the series' third season, though the group's creator becomes the season's chief antagonist following the empire's downfall. The group's primary focus is to absorb Duel Energy from the students of Duel Academy by the usage of energy-draining bands on their wrists, which is then used to revive their leader, Yubel.