John Sutton, 1st Baron Dudley, KG (25 December 1400 – 30 September 1487) was an English nobleman. A diplomat and councillor of Henry VI, he fought in several battles during the Hundred Years War and the Wars of the Roses, and acted as Lord Lieutenant of Ireland 1428–1430.
Born on 25 December 1400, John Sutton was baptised at Barton-under-Needwood, Staffordshire, became 1st Baron Dudley and a Knight of the Garter, and died at Stafford, Staffordshire. His father was Sir John de Sutton V and his mother was Constance Blount, daughter of Sir Walter Blount. John 1st Baron Dudley married Elizabeth de Berkeley, of Beverstone (died 1478), widow of Edward Charleton, 5th Baron Cherleton and daughter of Sir John Berkeley, of Beverstone, Gloucestershire (1349–1428) and Elizabeth Bettershorne and sister of Eleanor FitzAlan, wife of John FitzAlan, 13th Earl of Arundel, sometime after 14 March 1420. The sons of Dudley by this marriage were:
Dudley was summoned to Parliament from 15 February 1440, by writs directed to "Johanni de Sutton de Duddeley militi", whereby he obtained a Barony by writ as Lord Dudley. He was the first of his family to adopt the surname of Dudley as an alias for Sutton. "John Dudley, Knyght, Lord Dudley" died testate in his 87th year. His will is dated 17 August 1487. The barony was inherited by his grandson, Edward Sutton, 2nd Baron Dudley, son of Sir Edmund Sutton who was the heir but died after 6 July 1483 but before his father.