Áedán mac Gabráin (Old Irish pronunciation: [ˈaːi̯ðaːn mak ˈɡaβɾaːnʲ]; Irish: Aodhán mac Gabhráin), also written as Aedan, was a king of Dál Riata from c. 574 until c. 609 AD. The kingdom of Dál Riata was situated in modern Argyll and Bute, Scotland, and parts of County Antrim, Ireland. Genealogies record that Áedán was a son of Gabrán mac Domangairt.
He was a contemporary of Saint Columba, and much that is recorded of his life and career comes from hagiography such as Adomnán of Iona's Life of Saint Columba. Áedán appears as a character in Old Irish and Middle Irish language works of prose and verse, some now lost.
The Irish annals record Áedán's campaigns against his neighbours, in Ireland, and in northern Britain, including expeditions to the Orkney Islands, the Isle of Man, and the east coast of Scotland. As recorded by Bede, Áedán was decisively defeated by Æthelfrith of Bernicia at the Battle of Degsastan. Áedán may have been deposed, or have abdicated, following this defeat. His date of death is recorded by one source as 17 April 609, in Kilkerran.