1623 in Ireland

Events from the year 1623 in Ireland.

Incumbent

January 21 – Viscount Falkland, England's Lord Deputy of Ireland, issues a proclamation ordering all Roman Catholic priests to leave Ireland.
June 20 – order issued requiring civic officials to take the Oath of Supremacy and enforcing excommunication against those who have relapsed.{{cite book|editor=Moody, T. W.|title=A New History of Ireland. 8: A Chronology of Irish History|publisher=Oxford University Press|year=1989|isbn=978-0-19-821744-2|display-editors=etal}}
June 29 – Malcolm Hamilton is consecrated Church of Ireland Archbishop of Cashel.{{cite book|last=Cotton|first=Henry|title=The Succession of the Prelates and Members of the Cathedral Bodies of Ireland, Vol. 1, The Province of Munster|edition=2nd|series=Fasti ecclesiae Hiberniae|year=1851|publisher=Hodges and Smith|location=Dublin|page=13}}{{cite book|author=Fryde, E. B.|author2=Greenway, D. E.|author3= Porter, S.|author4= Roy, I.|title=Handbook of British Chronology|edition=3rd|publisher=Cambridge University Press|year=1986|isbn=0-521-56350-X|page=381}}

February 4 – the Talbot Baronetcy, of Carton in the County of Kildare, is created in the Baronetage of Ireland for the lawyer and politician William Talbot.
February 21 – the Barnewall Baronetcy, of Crickstown Castle in the County of Meath, is created in the Baronetage of Ireland for Patrick Barnewall.
May 2 – the Stewart Baronetcy, of Ramelton in the County of Donegal, is created in the Baronetage of Ireland for the soldier William Stewart.
December 30 – the Newcomen Baronetcy, of Kenagh in the County of Longford, is created in the Baronetage of Ireland for Robert Newcomen.
The Dungan Baronetcy, of Castletown in the County of Kildare, is created in the Baronetage of Ireland for Walter Dungan.
The title of Viscount Magennis of Iveagh is created for the chief of the clan Magennis.