Dalaradia was a kingdom of the Cruthin in the north-east of Ireland and parts of Scotland in the first millennium. The lands of the Dalaradia appear to correspond with the Robogdii of Ptolemy‘s Geographia, a region shared with Dál Riata. Fiachu Araide was the eponymous founder of the Dál nAraidi.
It was centred on the northern shores of Lough Neagh in southern Antrim. Dalaradia was the second kingdom of Ulster, and its kings contended with the Dal Fiatach for the high-kingship for some centuries. It is doubtful whether the Dál nAraidi kingdom existed, except as a loose confederation of small kingdoms, until the 8th century, long after the Cruithne kings had ceased to have any real control over the high-kingship of Ulster.