1775 in Ireland

Incumbent

• Monarch: George III

  Events

• Henry Flood accepts a seat on the Privy Council of Ireland and becomes vice-treasurer.
• Henry Grattan enters the Parliament of Ireland and becomes leader of the "patriot party".
• Approximate date – Dark Hedges planted.
• November – the 90ft tall round tower adjoining the Church of St Michael le Pole in Dublin is damaged in "the great storm of 1775", and subsequently demolished for safety in 1778.

  Arts and literature

• 17 January – Richard Brinsley Sheridan's first play, the comedy of manners The Rivals, is premiered at the Covent Garden Theatre, London.
• Robert Jephson's tragedy Braganza is first performed at the Theatre Royal, Drury Lane, London.

  Births

• 3 March – Henry Prittie, 2nd Baron Dunalley, politician.
• 25 April – William Warren Baldwin, doctor, businessman, lawyer, judge, architect and political figure in Upper Canada.
• 6 August – Daniel O'Connell, politician, campaigner for Catholic emancipation and Repeal of the Union.
• 30 September – Robert Adrain, scientist and mathematician in America.
• ;Full date unknown
• :*Bernard McMahon, horticulturalist in the United States.
• :*William Thompson, political and philosophical writer and social reformer.

  Deaths

• 27 April – John Rutty, Quaker physician and naturalist.
• 31 December – Richard Montgomery, soldier, major general in the Continental Army during the Revolutionary War.
• Probable date – Elizabeth Aldworth, freemason.