Earl of Darnley is a hereditary title that has been created three times, twice in the Peerage of Scotland and once in the Peerage of Ireland. The first creation in the Scots Peerage came in 1580 in favour of Esme Stewart, 1st Earl of Lennox, who was created Duke of Lennox at the same time. The title of Lord Darnley had previously been held by John Stewart, head of the house of Stewart of Darnley and first Earl of Lennox (1488). The second creation in the Peerage of Scotland came in 1675 in favour of Charles Lennox, 1st Duke of Richmond. He was made Duke of Lennox at the same time. For more information on this creation, see the Duke of Richmond.