Bladast or Bladastes was a Frankish dux during the reigns of Chilperic I and Chlothar II.
In 613, several leading magnates of Austrasia and Burgundy abandoned Brunhilda, the great-grandmother and regent of their king, Sigebert II, and turned to Chlothar II of Neustria for support, promising not to rise in defense of the queen-regent and recognizing Chlothar as rightful regent and guardian of the young king.