1148 in Ireland

• High King: Toirdelbach Ua Conchobair

• Baltinglass Abbey founded by the Cistercians in Baltinglass

• Death of Saint Malachy in Clairvaux, on his second journey to Rome.Illustrated Dictionary of Irish History. Mac Annaidh, S (ed). Gill and Macmillan, Dublin. 2001{{cite book | editor1=Moody, TW | editor2=Martin, FX | year=1967 |title=The Course of Irish History | publisher=The Mercier Press | location=Cork, Ireland | pages=120}}

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{{Years in Ireland}}

{{Year in Europe|1148}}

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