← 1839 1838 1837 1836 1835 1840 in Ireland → 1841 1842 1843 1844 1845
Centuries:	17th 18th 19th 20th 21st
Decades:	1820s 1830s 1840s 1850s 1860s
See also:	1840 in the United Kingdom Other events of 1840 List of years in Ireland

Events from the year1840 in Ireland.

• 10 January –Uniform Penny Post introduced.
• 1 April –Theatre Royal, Cork burns down.
• 19 May – foundation stone of theRoman CatholicSt Mel's cathedral, Longford, is laid.
• 10 July –General Assembly of the Presbyterian Church in Ireland established.
• 28 July – first permanent presence ofthe Church of Jesus Christ of Latter-day Saints in Ireland when Mormon missionariesJohn Taylor, William Black and James McGuffie arrive to work in theNewry,Lisburn andBelfast areas. On 31 July Thomas Tait becomes the first convert baptised in Ireland, atLoughbrickland.^[1]
• The Palm House inBelfast Botanic Gardens is completed, constructed byRichard Turner ofDublin. It is one of the earliest examples of a curvilinearcast ironglasshouse in the world.
• Bewley's established as tea and coffee importers.

Full date unknown

• Samuel Kelly, started his business as a "grocers and commission coal merchant" onQueen's Quay, Belfast, that would go on to becomeJohn Kelly Limited.^[2]

• Edward Bunting'sThe Ancient Music of Ireland is published, incorporating "A Dissertation on the Irish Harp and Harpers, Including an Account of the Old Melodies of Ireland".

• 1 January –Patrick Walsh, journalist, politician and mayor ofAugusta, Georgia (died1899).
• 4 January –Bishop Richard Owens,Bishop of Clogher 1894–1909 (died1909).
• 8 January –Henry Arthur Blake,British colonial administrator and Governor ofHong Kong (died1918).
• 17 January –William Pery, 3rd Earl of Limerick, peer (died1896).
• 27 February –Thomas Kelly-Kenny,British Army general who served in theSecond Boer War (died1914).
• 29 February –John Philip Holland, engineer, developed the firstRoyal Navysubmarine (died1914).^[3]
• 25 March –Myles Keogh, officer inAmerican Civil War, later inU.S. 7th Cavalry Regiment, killed at theBattle of the Little Bighorn (died1876).
• 26 April(bapt.) –Paddy Hannan,gold prospector whose discovery in 1893 nearKalgoorlie,Western Australia set off agold rush (died1925).
• 27 April –Tom Gallaher,tobacco manufacturer (died1927).
• 23 May –George Throssell, secondPremier of Western Australia (died1910).
• 20 September –Ellen Mary Clerke, author, journalist, poet and science writer (died1906).
• 1 November –Arthur Guinness, 1st Baron Ardilaun, businessman, politician, and philanthropist (died1915).
• 17 November –Lawrence Parsons, 4th Earl of Rosse, eighteenthChancellor of the University of Dublin (d.(1908).
• 28 December –Thomas Hovenden, artist and teacher (died1895).

  Full date unknown

  • William Abraham,Irish NationalistMP (died1915).
  • Timothy J. Campbell,DemocratU.S. Representative fromNew York (died1904).
  • John Kelly,coal merchant ofJohn Kelly Limited (died1904).^[4]
  • Timothy H. O'Sullivan, photographer in the United States (died1882)

• 15 April –Thomas Drummond, military surveyor andUnder-Secretary for Ireland (born1797 in Scotland).
• 21 April –Standish O'Grady, 1st Viscount Guillamore, Lord Chief Baron of the Exchequer in Ireland (born1766).
• 12 June –Gerald Griffin, novelist, poet and playwright (born1803).
• 20 August –George Canning, 1st Baron Garvagh, politician (born1778).

• 1840 in Scotland
• 1840 in Wales

• 1840 in Ireland
• 1840s in Ireland
• Years of the 19th century in Ireland
• 1840 in Europe
• 1840 by country
• 1840 in the United Kingdom

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