The following is a list of events from the year 1109 in Ireland.

Incumbents High King of Ireland: Domnall Ua Lochlainn

Events An army was led by the High King, with the people of Northern Ireland, to Sliabh. However, Ceallach, successor of Patrick, made a year's peace between Mac Lochlainn and Ua Briain; after which the people with the Cinel-Conaill and Cinel-Eoghain, proceeded to attack the Ulidians; who in turn gave them the three hostages which they themselves selected. Fighting is recorded among Leinster dynasties, involving the Uí Cheinnselaig rival Leinster factions. These conflicts are recorded as violent clashes.The Oxford Illustrated History of Ireland. Foster, RF. Oxford University Press, Oxford. 1989

Deaths Maelisa Ua Cuillen, noble bishop of Northern Ireland

References