Duncan Campbell, 1st Lord Campbell (Classical Gaelic Donnchadh mac Cailein, and also called Donnchadh na-Adh (English: Duncan the fortunate) of Loch Awe, (died 1453), was a Scottish nobleman and politician. He was an important figure in Scottish affairs in the first half of the 15th century and Justiciar of Argyll. He was head of the Clan Campbell for 40 years.