See also: 1964 in Ireland, other events of 1965, 1966 in Ireland and the list of 'years in Ireland'.

Events

• January 14 - An Taoiseach Sean Lemass travels to Belfast for an historic meeting with the Prime Minister of Northern Ireland Terence O'Neill.
• January 21 - Nationalist leader Eddie McAteer visits An Taoiseach Sean Lemass in Dublin.
• February 28 - Roger Casement is honoured with a state funeral in Dublin.
• March 7 - Changes to the Liturgy of the Mass are introduced throughout the country today. Mass is said in the vernacular for the first time.
• March 18 - The Northern Minister for Agriculture, Harry West attends a meeting with his Southern counterpart, Charles Haughey, in Dublin.
• April 18 - The GAA Congress in Dublin decides that the ban on foreign games is to stay in place.
• April 21 - James Dillon resigns as leader of the Fine Gael. Liam Cosgrave is the new leader.
• May 24 - The first car ferry service between Rosslare, County Wexford and Fishguard, Wales officially opens.
• June 13 - Huge crowds turn out at Drumcliffe Churchyard, County Sligo to honour the poet W.B. Yeats on the centenary of his birth.
• July 8 - An Taoiseach Sean Lemass is conferred with an honoury Doctorate of Law at Trinity College Dublin.
• November 17 - The remains of W.T. Cosgrave, first President of the Executive Council are removed to a church in Rathfarnham, Dublin.

Arts and literature

Sports

Births

• October 8 - Ardal O'Hanlon, actor and comedian.

Deaths

• November 16 - William T. Cosgrave, first President of the Executive Council and former leader of Cumann na nGaedhael and Fine Gael.