John de Lisle, 2nd Baron Lisle, KG (March 1318 – 14 October 1355) was a companion of the future King Edward III of England, and one of the founders and eighth Knight of the Garter in 1348.
John de Lisle's parents were Robert de Lisle, 1st Baron Lisle of Rougemont and Margaret de Beauchamp, daughter of Walter de Beauchamp of Alcester. At the age of 17, he was awarded a manor in order to obtain sufficient income to support him during warfare. In 1337, he was awarded another manor, at Harewood, by his father. He was also granted six men at arms and 400 Marks per year. In 1340, he was at war in Flanders, where he fought at Vironfosse. He later saw service in Aquitaine, and fought alongside Edward III in Brittany, at which time he was a Knight banneret. The King awarded him 200 Pounds for life.
In 1345, de Lisle was a commander of English forces at the siege of Nantes, and in following years fought in Gascony and at Crecy.
In 1350, upon the death of John de Lisle's older brother, he was summoned to Parliament as Baron de L'Isle of Rougemont. In the following year, he was known as Lord of Harewood. In 1352, he was granted custody of Cambridge Castle for life, and was named Sheriff of Cambridge and Huntingdon.
In 1355, de Lisle attended the King during a campaign in Gascony, where he commanded the main body of the English force. During the campaign, he was struck by a crossbow bolt and killed.
John de Lisle was married to Maud de Grey (1305–1376), daughter of Sir Henry de Grey. They were of such near consanguinity that they needed a special dispensation for their marriage. They had issue:
The east window of the Harewood Church showed an image of John de Lisle until the time of its restoration in 1793.