Niall Mac Lochlainn (died 1176) was a Cenél nEógain king of the Northern UàNéill. He was a member of the Meic Lochlainn, and a son of Muirchertach Mac Lochlainn, King of Cenél nEógain. RuaidràUa Conchobair, King of Connacht divided TÃÂr nEógain between Niall and ÃÂed Méith Ua Néill in 1167. Muirchertach's granddaughter, Findguala, who married Guðrøðr ÃÂláfsson, King of Dublin and the Isles, appears to have been a daughter of Niall.