Charles Hay, 3rd Marquess of Tweeddale PC (1670 – 7 December 1715) was a Scottish nobleman.
He was the eldest son of John Hay, 2nd Marquess of Tweeddale and the former Lady Mary Maitland.
His younger brother, Lord John Hay, commanded the famous regiment of dragoons, afterwards called the Scots Greys, at the Battle of Ramillies.
His maternal grandparents were John Maitland, 1st Duke of Lauderdale and the former Anne Home.
[1] Before his death in 1715, they were the parents of three boys:[3] Lord Tweeddale died on 7 December 1715 and was succeeded in his titles and estates by his eldest son, John.