Ermengol (or Armengol) VI (1096 – 1154), called el de Castilla ("the one from Castile"), was the Count of Urgell from 1102 to his death. He was the son and successor of Ermengol V and María Pérez, daughter of Count Pedro Ansúrez, Lord of Valladolid, who became his tutor when he was orphaned in 1102.