John Charles Sholto Douglas, 21st Earl of Morton (19 March 1927 – 5 March 2016) was a Scottish peer and landowner.
Douglas was the son of Hon. Charles William Sholto Douglas and Florence Timson, daughter of Edith Theodosia Glyn and Henry Thomas Timson. He was educated at Bryanston School and Canford School. He succeeded to the earldom in 1976, upon the death of his first cousin, the 20th Earl. Morton was a property consultant, a partner in Dalmahoy Farms and chairman of the Edinburgh Polo Club, and was a director in Scotland of the Bristol & West Building Society. In 1982, he was appointed a deputy lieutenant of West Lothian, and he served as Lord Lieutenant of West Lothian from 1985 to 2002.