Eógan mac Néill (modern orthography: Eoghan mac Néill) (reportedly died 465) was a son of Niall Noígiallach and the eponymous ancestor of the Cenél nEógain branch of the Northern Uí Néill, who founded the over-kingdom of Ailech and later Tír Eoghain. His territory occupied the counties of Tyrone, Armagh, Londonderry and north west Donegal. His burial place lies in the Inish Owen Peninsula in County Donegal which was named after him.