Alexander of Argyll, also known as Alexander of Lorne, and Alexander MacDougall (Scottish Gaelic: Alasdair MacDubhgaill; died 1310), was a Scottish magnate from the late 13th and early 14th century. Alexander was the son of Ewen MacDougall, Lord of Argyll. Although the details of Alexander's early life are largely unknown, he appears to have succeeded to his father's position as Lord of Argyll and Lorne and head of the MacDougall kindred after the latter's death in 1268. Alexander appears to have been named after King Alexander III of Scotland. Under the latter's authority, Alexander was involved in the Scottish expedition that quelled a revolt on the Isle of Man in 1275.