The ruler of Alba at the beginning of 1005 was King Kenneth III (Kenneth the Brown), who had ruled since 997. This year, King Malcolm II (Malcolm the Destroyer) would take over.
DeheubarthDeheubarth had many competing rulers in 1005:
- King Cynan ap Hywel ap Ieuaf
- King Edwin ab Einion ab Owain
- King Cadell ab Einion ab Owain
The ruler of England was King Æthelræd II (Æthelred the Unready), who had ruled since 978 and would continue to do so until 1013.
The ruler of Gwynedd at the beginning of 1005 was King Cynan ap Hywel, who had ruled since 999. This year, King Aeddan ap Blegywryd would take over.
The ruler of Moray was Mormaer Findláech mac Ruaidrí (probably, the start of his reign is shrouded in mystery).
The ruler of Strathclyde at this time was likely to have been King Owain Foel.