Alexander Lyon, 2nd Lord of Glamis (c. 1430–1486), was a Scottish nobleman.
The son of Patrick Lyon, 1st Lord Glamis (d. 1459), he was Keeper of Kildrummy Castle and Kindrochit Castle from his father's death until 1462. He later sat on the King's Council.
He married Agnes Crichton, daughter of William Crichton, 1st Lord Crichton, Chancellor of Scotland, but had no surviving children. His title was inherited by his younger brother John Lyon.