Dunadd is an Iron Age hillfort near Kilmartin in Argyll, Scotland. Formerly an island, it now lies inland on the River Add.
The site was originally occupied by the Picts, and later became the seat of Dalriada under Fergus I. It is known for its stone carvings, including a footprint and basin thought to form part of Dalriada's coronation ritual; also a sketch of a boar, and writing in ogham script.
The fort at Dunadd is one of several rocky hillforts used by the Scots of Dalriada.
Dunadd was a strong position, although there is documentary evidence that it had been under seige at several points in history, in 683 AD and again in 736 AD by Angus, King of the Picts, during his conquest of the district.
Traditionally Dunadd is known as the capital of Dalriada, although Historians believe that it might not have been, but they do admit it is 'high status' which means very important.