Events from the year 1102 in Ireland.
Incumbents
- High King of Ireland: Domnall Ua Lochlainn
Events
- Arnulf de Montgomery, Lord of Pembroke, being banished from England and Wales for joining with his brother in rebellion against Henry I of England, serves his father-in-law, Muirchertach Ua Briain, High King of Ireland; Henry imposes a trade embargo against Ireland.
- Betrothal of Muirchertach Ua Briain's daughters: Lafracoth to Arnulf de Montgomery and Bjaðmunjo to Sigurd (son of Magnus Barefoot).
- Archbishop Anselm of Canterbury writes to Muirchertach Ua Briain urging ecclesiastical reform and restoring good relations between him and Henry I of England.
- Domnall Ua Conchobair becomes King of Connacht
Births
- Gilla na Naemh Ua Duinn, poet, historian and cleric (died 1160).
- Approximate date and probable location – Harald IV Gille of Norway (killed 1136).
Deaths
- Mugrón Ua Morgair, archlector of Armagh.
- Domnall Ua Ruairc, King of Connacht and Breifne.
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