1574 in Ireland

Centuries:	14th; 15th; 16th; 17th; 18th;
Decades:	1550s; 1560s; 1570s; 1580s; 1590s;
See also:	Other events of 1574 ; List of years in Ireland

Events from the year 1574 in Ireland.

Incumbent

May 8 – Brian O'Neill of Clandeboye, having submitted to the Earl of Essex, begs Elizabeth I of England for mercy.^[1]
July 18 – the Geraldine chiefs sign the Combination, promising to support Gerald FitzGerald, 15th Earl of Desmond, unconditionally.
September 2 – Desmond submits to William FitzWilliam (Lord Deputy) at Cork following a month's campaign in Munster during which his castle at Derinlaur has been taken.^[1]
September – Essex campaigns against Turlough Luineach O'Neill.^[1]
November
- Essex meets Brian O'Neill of Clandeboye at his castle of Edendubhcarrig (County Antrim) where at least 200 of the clan O'Neill are treacherously massacred at a feast while O'Neill himself, his wife and brother are captured, taken to Dublin, executed^[1] and quartered. The Lordship of Clandeboye is partitioned in three by the English.
- The rebel Rory O'More is briefly imprisoned.
November 5 – Edmund Tanner (d. 1579 in Ireland) is appointed Roman Catholic Bishop of Cork and Cloyne and consecrated in Rome.

^ ^a ^b ^c ^d Moody, T. W.; et al., eds. (1989). A New History of Ireland. 8: A Chronology of Irish History. Oxford University Press. ISBN 978-0-19-821744-2.