Congal Cennfota mac Dúnchada (died 674) was a Dal Fiatach king of Ulaid.
He was the son of Dúnchad mac Fiachnai (died circa 644), a previous king.
In 647 he killed or slew his uncle Máel Cobo mac Fiachnai the king of Ulaid.
Congal suffered the same fate as his uncle when he was slain or killed by his cousin's son Bécc Bairrche mac Blathmaic (died 718) in 674.
[3] Congal had a daughter named Conchenn ingen Congaill who was married first to Fínsnechta Fledach (died 695) of the Síl nÁedo Sláine, high king of Ireland and Congal may have had some support from the Ui Neill.