William Stewart (1737 – 8 October 1797), of Castle Stewart, was a Scottish MP in the British Parliament. He was a member of a junior branch of the family of the Earl of Galloway, being the first son of John Stewart of Castle Stewart. Stewart was educated at Glasgow University. He was an officer in the 60th Regiment of Foot during the Seven Years' War, leaving the army in 1769 as a Captain. He represented Wigtown Burghs from 7 May 1770 – 1774 and Kirkcudbright Stewartry in 1774–1780. References History of Parliament: House of Commons 1754-1790, by Sir Lewis Namier and James Brooke (Sidgwick & Jackson 1964) 1737 births 1797 deaths Members of the Parliament of Great Britain for Scottish constituencies British Army personnel of the Seven Years' War Royal American Regiment officers Alumni of the University of Glasgow Politics of Dumfries and Galloway Scottish soldiers British MPs 1768–1774 British MPs 1774–1780