John Holland, 1st Duke of Exeter KG (c. 1352 – January 16, 1400) also 1st Earl of Huntingdon, is an English nobleman, a half-brother of King Richard II (1377-1399), to whom he remains strongly loyal.

He is primarily remembered for being suspected of assisting in the downfall of King Richard's uncle Thomas of Woodstock, 1st Duke of Gloucester (1355-1397) (youngest son of King Edward III) and then for conspiring against King Richard's first cousin and eventual deposer, Henry Bolingbroke, later King Henry IV (1399-1413).