1598 in Ireland

Events from the year 1598 in Ireland.

Incumbent

 * Monarch: Elizabeth I

Events

 * early June – Nine Years' War: Lord Treasurer Thomas Butler backs the claim of the exiled Tadhg O'Rourke for the kingship of West Breifne, causing King Brian Óg O'Rourke to defect back to the rebels.
 * 7 June – Nine Years' War: The temporary ceasefire agreed between the Irish rebel lordships and the English in October 1597 expires.
 * 14 August – Nine Years' War: Hugh O'Neill, Earl of Tyrone's victory over an English expeditionary force under Henry Bagenal, at the Battle of the Yellow Ford.
 * October – Nine Years' War: Edmund Spenser's castle at Kilcolman, near Doneraile in North Cork, is burned down by O'Neill's native Irish forces. Spenser leaves for London shortly afterwards.

Births

 * Patrick D'Arcy, nationalist who wrote the constitution of Confederate Ireland (d. 1668).

Deaths

 * 14 August – Henry Bagenal, Marshal of Ireland, is killed at Yellow Ford.
 * 14 August – Maelmora O'Reilly, pretender to the kingship of East Breifne, is killed at Yellow Ford.