Eugene Egan (Owen McEgan and other variants) (died 1603) was a Catholic apostolic vicar in Ireland, designated bishop of Ross, County Cork, closely involved with the uprising of the Nine Years' War.
In 1600 he was in Ireland actively encouraging rebellion, meeting Hugh O'Neill, 2nd Earl of Tyrone in February at Tipperary, and co-operating with Florence MacCarthy Reagh.
Egan then gained access to the Spanish court at Valladolid, travelling there with Mansoni, and influenced Philip III of Spain, in the direction of sending men and money to Kinsale in 1601, to support the rebellion which Tyrone had raised in the south of Ireland.
Pope Clement VIII summoned Egan back to Rome, appointed him apostolic vicar, created him D.D., and conferred on him livings in Munster.
Charles Blount, 8th Baron Mountjoy had enjoyed success in the field against Tyrone's rebellion, and Kinsale was closely invested.