Dúnchad Muirisci mac Tipraite (died 683)[1] was a King of Connacht from the Ui Fiachrach branch of the Connachta.
He was of the Ui Fiachrach Muaidhe sept based along the River Moy.
This line was descended from Fiachnae, a brother of Ailill Molt who lived about two centuries earlier than Dúnchad Muirisci.
[2] His epithet shows that he won control of the Muiresc region on the Moy and his line provided the later kings of Ui Fiachrach.
His known sons were Indrechtach mac Dúnchado (died 707), a king of Connacht, and Aillil.