Niall Mac Lochlainn (died 1176) was a Cenél nEógain king of the Northern Uí Néill.[1] He was a member of the Meic Lochlainn,[2] and a son of Muirchertach Mac Lochlainn, King of Cenél nEógain.[3] Ruaidrí Ua Conchobair, King of Connacht divided Tír nEógain between Niall and Áed Méith Ua Néill in 1167.[4] Muirchertach's granddaughter, Findguala, who married Guðrøðr Óláfsson, King of Dublin and the Isles, appears to have been a daughter of Niall.[5]