mac Néill is an Irish surname. Notable people with the surname include:
Áed Oirdnide (Áed mac Néill, died 819), son of Niall Frossach Áed Findliath (Áed mac Néill, died 879), son of Niall Caille Cathal mac Néill (died 729), Irish king Coirpre mac Néill (died after 485), founder of the Cenél Coirpri Eógan mac Néill (died 465), Irish king Fiachu mac Néill (fl. 507–514), Irish king Fogartach mac Néill (died 724), Irish king Lóegaire mac Néill (died c. 462), son of Niall of the Nine Hostages Maine mac Néill (died 712), Irish king Muirchertach mac Néill (died 943), Irish king
See also MacNeill