13 April – delegates at the annual conference of the Farmers' Party reject proposals to merge with Cumann na nGaedheal.
18 April – Celtic Park in Belfast is opened. It is the first greyhound track in Ireland.
20 May – the Intoxicating Liquor Act requires bars to be closed all day on Christmas Day and Good Friday.
4 June – the results of the general election are a hung Dáil, with Fianna Fáil entering the Dáil for the first time and removing Cumann na nGaedheal's majority.
20 June – in a radio broadcast, the leader of Fianna Fáil, Éamon de Valera, says that the results of the general election prove that the people of Ireland want to get rid of the Oath of Allegiance.
29 June – a morning Solar eclipse takes place across Ireland.
15 September – a new general election is called due to the hung Dáil; again it is very close, with Cumann na nGaedheal winning 62 seats, Fianna Fáil 57, Labour 13, the Farmers' Party 6, National League Party 2, and the Irish Worker League just one – James Larkin.
Undated – The Industrial and Commercial Property Registration Office (re-designated the Patents Office by the Patents Act 1964) is established at 45 Merrion Square, Dublin.
^Naughton, Russell (15 October 2002). "Lady Mary Bailey (1890–1960)". Hargrave – The Pioneers. Archived from the original on 10 April 2018. Retrieved 21 August 2012.
^"Exceptional weather events: October 1927 storm" (PDF). Met Eireann. Archived from the original (PDF) on 3 November 2011. Retrieved 24 April 2023.
^Cox, Michael, ed. (2004). The Concise Oxford Chronology of English Literature. Oxford University Press. ISBN 0-19-860634-6.
^"Former NI Ombudsman Maurice Hayes dies". BBC. 23 December 2017. Retrieved 23 December 2017.