Houat (Breton: Enez Houad; French: Île d'Houat, French pronunciation: ​[il dwat]) is a French island off the south coast of Brittany in the department of Morbihan. It is located, along with two other major islands, in the entrance to the Baie de Quiberon. Its "twin sister" island is Hoëdic. Administratively, Île-d'Houat is a commune of the Morbihan department.