Fergus Mór mac Eirc (Scots Gaelic: Fergus Mòr Mac Earca; Scots: Fergus the Great) wis a leegendar king o Dál Riata. He wis the son o Erc o Dalriada.

Fergus Mór
Keeng o Dalriada (possibly)
Ringtae 501 (possibly 498-501)
PredecessorNew title
SuccessorDomangart Réti
BornFergus Mór
before 426?
Dee'dc. 501
FaitherErc o Dalriada
MitherMist