John Devereux, 2nd Baron Devereux, KG, was a politician of the reign of King Richard II of England.

He was the son of William Devereux . From 1384 he was summoned frequently to Parliament, and in 1377 he was appointed to the King's council, in 1378 he was made constable of Leeds Castle for life, and from 1380 the Captain of the city of Calais. In 1387 he succeeded Simon de Burley as Constable of Dover Castle and made a Lord Warden of the Cinque Ports, also having been with the lords appellant at Waltham Cross.

In 1386 he was one of the Council of 11 appointed to govern England. From 1386 to 1390 (and perhaps longer) he was steward of the King's household. In 1394 John Devereux died in possession, by the right of his wife, of the manor of Penshurst, Kent. He was also lord of the manor of Donyngton in Buckinghamshire.

Further Reading: Project Gutenberg's Chaucer's Official Life, by James Root Hulbert.