1789 in Ireland

Incumbent

• Monarch: George III

  Events

• 26 March – The Abecedarian Society is established, for the purposes of "raising a fund for the relief of distressed school masters, school mistresses, and their families".
• 29 March – 12 July: John Wesley makes his last visit to Ireland.
• 20 June – following the death of James Hewitt, 1st Viscount Lifford, on 28 April, John FitzGibbon is appointed as Lord Chancellor of Ireland.
• 26 June – a Whig Club is established in Dublin.
• 28 August – the Hodson Baronetcy, of Holybrooke House in the County of Wicklow, is created in the Baronetage of Ireland for Robert Hodson, High Sheriff of Wicklow.
• 24 October – Royal Canal Company incorporated to construct a waterway from Dublin to the River Shannon.
• Mail coaches begin a scheduled service from Dublin to Belfast.

  Arts and literature

• Charlotte Brooke's Reliques of Irish Poetry is published in Dublin.
• Thomas Campbell's is published in Dublin.

  Births

• 26 March – Edward Ffrench Bromhead, mathematician.
• 24 September – Richard Henry Wilde, lawyer and Congressman in USA.
• 3 October – Henry Pottinger, soldier and colonial administrator, first Governor of Hong Kong.
• 6 October – Sir Michael O'Loghlen, 1st Baronet, judge, politician and Attorney-General for Ireland.
• Mary Fildes, née Pritchard, political activist.

  Deaths

• 9 October – James Hamilton, 8th Earl of Abercorn, politician.
• ;Full date unknown
• :*Frances Greville, poet.
• :*Barry St. Leger, British colonel during the American Revolutionary War.