Editing 1966 in Ireland (section)

==Deaths==
* 10 March – [[Frank O'Connor]], short story writer and memoirist (born 1903).
* 26 March – [[Joseph McGrath (Irish politician)|Joseph McGrath]], [[Sinn Féin]] party and later [[Cumann na nGaedheal]] party TD, racehorse owner and breeder (born 1888).
* 28 March – [[Patrick McCartan]], Sinn Féin member of parliament (MP) and TD, member of the [[First Dáil]], founder member of [[Clann na Poblachta]] (born 1878).
* 1 April – [[Brian O'Nolan]], satirist and humourist (born 1911).
* 29 April – [[Tom Hales (Irish republican)|Tom Hales]], [[Irish Republican Army]] [[volunteer (Irish republican)|volunteer]], fought in [[Anglo-Irish War]] and [[Irish Civil War]] (born 1892).
* 23 May – [[Jacko Heaslip]], cricketer (born 1899).
* 3 June – [[Fionán Lynch]], Sinn Féin MP and TD, member of the [[First Dáil]], Cabinet minister, Cumann na nGaedheal and [[Fine Gael]] party TD (born 1889).
* 7 June – [[James Hickey (Irish politician)|James Hickey]], Labour Party politician and [[Lord Mayor of Cork]].
* 26 July – [[Maura Laverty]], writer (born 1907).
* 12 August – [[Mike McTigue]], boxer, [[light heavyweight]] champion of the world 1923–1925 (born 1892).
* 23 November – [[Seán T. O'Kelly]], founding member of Fianna Fáil, Cabinet minister and second [[President of Ireland]] (born 1882).
* 14 December – [[Paul Galligan]], merchant, member of the First Dáil representing [[Cavan West (Dáil constituency)|Cavan West]] (born 1888).
* 15 December – [[Conn Ward]], Fianna Fáil politician (born 1890).
* 25 December – [[Thomas Arnold Harvey|Thomas Harvey]], cricketer and rugby player (born 1878).
* 27 December – [[Sim Walton]], hurler ([[Tullaroan GAA|Tullaroan]], Kilkenny) (born 1870).
* 31 December – [[Danny Ryan]], hurler ([[Moycarkey-Borris GAA|Moycarkey-Borris]], Kilkenny) (born 1880).

===Full date unknown===
:* [[Diarmuid Murphy (writer)|Diarmuid Murphy]], writer, theatre and film producer (born 1895).
:* [[Sydney Sparkes Orr]], Professor of Philosophy at the [[University of Tasmania]] (born 1914).