Events from the year 1339 in Ireland.

• Lord: Edward III

• 29 October – Ruaidhri O Ceallaigh is killed lby Cathal mac Aodh mac Eoghain O Conchobhair
• Toirdhealbach O Conchobhair marries the widow of Edmund de Burgh
• Edmond Albanach de Burgh is expelled from the western islands of Connacht to Ulster
• The Mint briefly reopens at Dublin (see 1302)
• Hostilities occur between the Anglo-Irish and Irish in Kildare, Meath and Kerry

• Ruaidri Ó Cellaigh, King of Uí Maine and Chief of the Name.

• "The Annals of Ireland by Friar John Clyn", edited and translated with an Introduction, by Bernadette Williams, Four Courts Press, 2007. ISBN 978-1-84682-034-2, pp. 240–244.
• "A New History of Ireland VIII: A Chronology of Irish History to 1976", edited by T. W. Moody, F.X. Martin and F.J. Byrne. Oxford, 1982. ISBN 0-19-821744-7.
• http://www.ucc.ie/celt/published/T100001B/index.html
• http://www.ucc.ie/celt/published/T100005C/index.html
• http://www.ucc.ie/celt/published/T100010B/index.html