Events from the year 1784 in Ireland.

• Monarch: George III

• 11 February – Royal College of Surgeons in Ireland chartered.
• 15 April – the first ascent of a manned balloon in the British Isles takes place with a hot air balloon at Navan^[1]
• The Old Bushmills Distillery becomes an officially registered company
• The post of Postmasters General of Ireland established
• William Conyngham begins installation of a planned settlement on Rutland Island, County Donegal
• New Church of Ireland St. John's Cathedral, Cashel, completed
• The satirist John Williams is prosecuted for an attack on the Duke of Rutland's administration in the Volunteers' Journal and flees the country

• 12 May – James Sheridan Knowles, dramatist and actor (died 1862).
• 20 September – Sir Richard John Griffith, 1st Baronet, geologist (died 1878).

  Full date unknown

  • Richard Church, soldier, military officer and general in the Greek Army (died 1873).
  • Thomas Barnwall Martin, soldier, landowner and politician (died 1847).

• 3 April – John Gore, 1st Baron Annaly, politician and peer (born 1718).
• 26 April – Nano Nagle, founder of the Presentation Sisters (born 1718).
• 29 May – George Barret, Sr., artist (born c.1730).
• Thomas Cooley, architect (born 1740 in England).