He is thirteen years old, he is one of the youngest members in the Young Justice team, but he is destined to be the leader some day, but since he is too young someone else is taking his role for the time being. He is Batman's protegee.
i think he's 17, 18, oder 19. Ik it sounds weird but what 13-14 Jahr old is capable of being a super hero? He's pretty mature, and is able to legally drive a motorcycle. I say the youngest he could possibly be is 16.