The title of Baron Grey of Rotherfield was created once in the Peerage of England. On 25 August 1338 Sir John de Grey was summoned to parliament, who was invested as Knight, Order of the Garter ten years later. On the death of the fourth baron in 1388, the barony became dormant.
However, the estate reaches back further to the Grey family's ancestor, the Norman knight Anchetil de Greye who is specifically mentioned in the Domesday Book as the lord of the Rotherfield estate or manor.
The principal estate of the Barons Grey was Greys Court located in Rotherfield Greys, Oxfordshire, although they were also feudal barons of Bedale in Yorkshire.