Events from the year 1690 in Ireland.

• Monarch: William III and Mary II

• 14 June – King William III of England (William of Orange) lands at Carrickfergus in Ulster and marches south to take Dublin.
• 29 June – Williamites reach the River Boyne.
• 1 July (O.S.) – Battle of the Boyne: William III defeats the deposed James II of England, who returns to exile in France^[1][2][3] from Kinsale.
• 17 July – William III issues the Declaration of Finglas offering a pardon to ordinary Jacobites but not their leaders.
• 7 August – William III and his army reach Limerick.
• August to September – Siege of Limerick, by the Williamites is unsuccessful.
• September – Siege of Cork.
• 7 October – an earthquake with its epicentre at Caernarfon is felt in Dublin.^[4]
• Siege of Athlone by the Williamites is unsuccessful.

• 26 September – Charles Macklin, actor and dramatist (d.1797)
• Charles Clinton, French and Indian War Colonel (d.1773)
• William Cosby, British royal governor of New York (d.1736)

• 1 July (O.S.) – Battle of the Boyne
  • Frederick Schomberg, 1st Duke of Schomberg, soldier (b. 1615 or 1616)
  • Rev. Sir George Walker, soldier, Governor of Londonderry (b. c. 1618)