Events

30 March – the United Kingdom Census shows that, as part of the legacy of the Great Famine, the population of Ireland has fallen to 6,575,000 – a drop of 1,600,000 in ten years.^[1]^[2] This is the first census to note use of the Irish language.^[3]
1 August – Midland Great Western Railway extended from Mullingar to Galway.^[3]
7 August – Poor Relief (Ireland) Act provides for the establishment of dispensaries.^[3]
Construction of MacNeill's Egyptian Arch, a railway bridge near Newry on the Dublin-Belfast railway line is completed.
Tillie and Henderson open their first shirt factory in Derry.

Ancestors of Presidents of the United States Barack Obama and Joe Biden migrate from Ireland to the U.S.^[4]
Jacob's brand of biscuits, bars and coffee is founded; their first biscuit is possibly Goldgrain.

Births

23 May – Richard Lalor Sheil, politician, writer and orator (born 1791).
1 September – Anne Devlin, Irish republican and housekeeper to Robert Emmet (born 1780).

^ Ross, David (2002). Ireland: History of a Nation (New ed.). New Lanark: Geddes & Grosset. pp. 216, 313. ISBN 1842051644.
^ Ó Gráda, Cormac (2006). Ireland’s Great Famine: Interdisciplinary Perspectives. University College Dublin Press. p. 3. ISBN 1-904558-57-7.
^ ^a ^b ^c Moody, T. W.; et al., eds. (1989). A New History of Ireland. 8: A Chronology of Irish History. Oxford University Press. ISBN 978-0-19-821744-2.
^ "Remarks by President Biden to the Houses of the Oireachtas". The White House. 2023-04-13. Retrieved 2023-04-14.

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