← 1639 1638 1637 1636 1635 1640 in Ireland → 1641 1642 1643 1644 1645
Centuries:	15th 16th 17th 18th 19th
Decades:	1620s 1630s 1640s 1650s 1660s
See also:	Other events of 1640 List of years in Ireland

Events from the year 1640 in Ireland.

Incumbent

• Monarch: Charles I

Events

• 5 December – John Atherton, Church of Ireland Bishop of Waterford and Lismore, and his proctor are executed on a charge of buggery, on Saint Stephen's Green, Dublin.^[1]
• Approximate date – Dubhaltach Mac Fhirbhisigh transcribes the only surviving copy of the Chronicon Scotorum.

Arts and literature

• 17 March (Saint Patrick's Day) – Henry Burnell's play Landgartha premieres at the Werburgh Street Theatre in Dublin. It is one of the earliest dramatic works from a native Irish playwright.
• James Shirley's play Saint Patrick for Ireland is published. The author returns to England around 16 April.

Births

• 29 June – Elizabeth Stanhope, Countess of Chesterfield (d. 1665 in England)
• Thomas Beecher, politician and soldier (d. 1709)
• Charles Molloy, lawyer (d. 1690)
• Approximate date
  • Thomas Knox, politician (d. 1728)
  • Philip Og O'Reilly, politician (d. 1703)

Deaths

• 5 December – John Atherton, Bishop of Waterford and Lismore (b. 1598)