Sir Bertram de Criol (Criel, Crioill, Cyroyl, or Kerrial, etc.) (died 1256) was a senior and trusted Steward and diplomat to King Henry III. He served as Constable and Keeper of Dover Castle, Keeper of the Coast and of the Cinque Ports, Keeper of the receipts, expenses and wardships of the archbishopric of Canterbury, Constable of the Tower of London and Sheriff of Kent.