List of kings of Dál Riata

This is a List of the kings of Dál Riata, a kingdom of uncertain origins which was located in Scotland and Ireland. Most kings of Dál Riata, along with later rulers of Alba and of Scotland, traced their descent from Fergus Mór mac Eirc, and even in the 16th century, James VI of Scotland called himself the "happie monarch sprung of Ferguse race".

Background
It is not until the middle of the 6th century that Irish annals plausibly report the deaths of kings of Dál Riata, with the death of Comgall mac Domangairt, c. 538–545, and of his brother Gabrán, c. 558–560. The last attested kings of Dál Riata are Fergus mac Echdach, brother and successor to Áed Find, whose death is reported in the Annals of Ulster in 781. It is thought that the original king-lists from which the High Medieval accounts were derived ended with Fergus. After Fergus the history of Dál Riata is very uncertain, although there is a report of the death in 792 of Donncoirce ("Dorm Corci, king of Dál Riata"), but of whom nothing more is known.

Dál Riata was divided into a number of kingroups or dynasties, called cenéla, of which the Cenél nGabráin of Kintyre, who claimed descent from Gabrán mac Domangairt, and the Cenél Loairn, who claimed descent from Fergus Mór's son Loarn, dominated the kingship. Given the nature of early medieval genealogies, and the doubts expressed even by contemporary writers, such as the compiler of the Senchus fer n-Alban, it would be unwise to place too much reliance on such claims.

The annals are not entirely consistent in naming kings. For example, is there a real difference between a "king of Dál Riata" and a "lord of Dál Riata"? A possible source of confusion is that the neighbouring cruithne kingdom of Dál nAraide in Ulster was similar in name when Latinised as Dalaradia, while Dál Riata became Dalriada, so that it is possible that some of the more obscure rulers may have been misattributed to Dál Riata. It has been proposed, but with little support, that the Irish part of Dál Riata had a separate existence from the Scottish part after the middle of the 7th century, so that one king ruled in Ireland while another ruled in Scotland.