1842 in Ireland

Events

• 15 October – The Nation newspaper is founded in Dublin.

  Births

• 6 February – Jeremiah O'Sullivan, Roman Catholic Bishop of Mobile.
• 10 February – Agnes Mary Clerke, astronomer and writer.
• 9 May – William Hone, cricketer.
• 23 August – Osborne Reynolds, engineer and prominent innovator in the understanding of fluid dynamics.
• 3 September – John Devoy, Fenian organiser and exile.

  Deaths

• 25 March – William Beatty, ship's surgeon on during the Battle of Trafalgar.
• 11 April – John England, first Catholic Bishop of Charleston, South Carolina.
• 8 June – Henry Parnell, 1st Baron Congleton, politician..
• 12 August – William Corbet, member of the United Irishmen, soldier, Commander-in-Chief to French forces in Greece.
• 21 August – William Maginn, journalist and writer.
• 30 August – John Banim, dramatist and playwright.
• 28 September – Sir Michael O'Loghlen, 1st Baronet, judge, politician and Attorney-General for Ireland.
• 4 October – Lowry Cole, soldier, politician and MP for Enniskillen from 1797 to 1800, Governor of Mauritius and Cape Colony.