| 释义 |
- Events
- Honours
- Births
- Deaths
{{Unsourced|date=February 2015}}{{YearInIrelandNav | 1620 }}Events from the year 1620 in Ireland. Events- County Longford is planted by English and Scottish landowners, with much of the O'Farrell lands being confiscated and granted to new owners.
- Bangor, County Down, is granted the status of a port by King James I of England.
Honours- October 13 – the Blundell Baronetcy is created in the Baronetage of Ireland in favour of Francis Blundell, Vice-Treasurer and Receiver-General of Ireland.
- November 10 – the Parsons Baronetcy, of Bellamont in the County of Dublin, is created in the Baronetage of Ireland in favour of William Parsons, Surveyor General of Ireland.
- December 12 – the title of Earl of Antrim is created in the Peerage of Ireland in favour of Randal MacDonnell, Viscount Dunluce.
- The titles of Earl of Cork and Viscount of Dungarvan are created in the Peerage of Ireland in favour of Richard Boyle, Lord Boyle.
- The title of Viscount Grandison is created in the Peerage of Ireland in favour of Oliver St John, Lord Deputy of Ireland.
Births- Peter Talbot, Archbishop of Dublin (Roman Catholic) (d. 1680)
- Approximate date – Redmond O'Hanlon, outlaw (d. 1681)
Deaths- February 15 – James Archer, Jesuit (b. 1550)
- July 10 – John Boyle, Bishop of Cork, Cloyne and Ross (b. 1563?)
{{Years in Ireland}}{{Year in Europe|1620}} 4 : 1620 in Ireland|1620s in Ireland|1620 by country|Years of the 17th century in Ireland |