John Montagu, 3rd Earl of Salisbury

John Montagu, 3rd Earl of Salisbury (c. 1350–1400), was an English nobleman and one of the firmest partisans of Richard II. A prominent Lollard, he succeeded his uncle as Earl of Salisbury in 1397, helped overthrow the Duke of Gloucester, and became a Knight of the Garter.

He accompanied Richard's last expedition to Ireland and was sent to Wales against Henry Bolingbroke, but his men deserted. Henry IV imprisoned him in the Tower after seizing the throne.

Released, he joined the Epiphany Rising of January 1400 to restore Richard; he was captured by townspeople at Cirencester and beheaded without trial on 7 January 1400.