John FitzJohn (died 1275) was an English nobleman who was a leading baron during the Second Barons' War.

Biography

Fitz-John was the eldest son of John Fitzgeoffrey and Isabel Bigod.

John married Margery, daughter of Philip Basset and his wife Hawise de Lovaine. During 1263, FitzJohn joined the baronial revolt led by Simon de Montfort, Earl of Leicester.