← 1240 1239 1238 1237 1236 1241 in Ireland → 1242 1243 1244 1245 1246
Centuries:	11th 12th 13th 14th 15th
Decades:	1220s 1230s 1240s 1250s 1260s
See also:	Other events of 1241 List of years in Ireland

Events from the year 1241 in Ireland.

Incumbent

• Lord: Henry III

Events

• 10 May – (in Irish mythology) Battle of Cameirge in Ulster: the Milesian Irish septs of the Ó Dónaills from Donegal, the Ó Néills from Armagh and the Ó Dochartaighs of Connacht defeat the last Tuatha Dé Danann sept, the Meic Lochlainn of Tír Eoghain and Inishowen under Domhnall mac Muirchertaigh Mac Lochlainn. From now on the Kings of Tír Eoghain will all be of the Ó Néill dynasty, Brian Ua Néill becoming sole ruler.
• Dominican friary at Athenry founded by the de Bermingham family.
• Justice Henry of Bath is on a mission in Ireland.

Deaths

• Walter de Lacy, Lord of Meath (born c.1172).
• Domhnall (Mór) Ó Domhnaill.^[1]
• Domhnall mac Muirchertaigh Mac Lochlainn, King of Tír Eoghain.