Alexander Gordon, Lord Rockville (1739 – 13 March 1792) was a Scottish judge.
He became an advocate 7 August 1759 and served as Sheriff of Kirkcudbright from 1764 to 1784.
He died on 13 March 1792 and is buried in St Cuthbert's churchyard in Edinburgh.
The eroded family stone lies in the north-west corner close to the elaborate Gothic Bailey vault.
One of their sons was Sir William Duff-Gordon, 2nd Baronet, MP for Worcester.