1171 in Ireland

Centuries:	; 11th; 12th; 13th; 14th;
Decades:	1150s; 1160s; 1170s; 1180s; 1190s;
See also:	Other events of 1171 ; List of years in Ireland

Events from the year 1171 in Ireland.

Events

May – following the death of Diarmait Mac Murchada, King of Leinster, the lordship of Leinster is disputed between his son, Domhnall Caomhánach, and the Cambro-Norman Richard de Clare (Strongbow).^[1]
Henry II of England arrives in Ireland;^[1] Irish bishops and most Irish kings submit to his rule.^[1]
Ascall mac Ragnaill, last Norse–Gaelic King of Dublin, is captured while trying to retake Dublin from de Clare, perhaps in company with Sweyn Asleifsson, and beheaded; before the end of the year, de Clare relinquishes possession of the city to his own liege lord, Henry.