William of Huntingfield (d 1219/1) was a medieval English landowner, High Sheriff of Norfolk and Suffolk and one of the Magna Carta sureties.
He held Dover Castle for King John from September 1203 and in exchange, the king held his son and daughter hostage[1]. He was granted the lands seized from his disgraced brother and appointed Sheriff of Norfolk and Suffolk for 1210 and 1211. In the First Barons' War he was an active rebel against King John and one of the twenty-five chosen to oversee the observance of the resulting Magna Carta.
He subsequently supported the French invasion of England, and took part in the Fifth Crusade, where he died.[2] He had married Isabel Fitz Roger, daughter of William Fitz Roger and was succeeded by his son Roger.