“IT WAS MY UNDERSTANDING THAT THERE WOULD BE NO MATH:” How Old Is Malia Obama? Don’t Ask Her Dad. “But hey, it’s not like he said something arguably inaccurate about Paul Revere or any of the other Founding Fathers. (Or even John Wayne!) Family man Barack Obama simply doesn’t know how old his own daughter is. He’ll definitely get it right when she turns 18, though, because he’ll be reminded every time he plays golf.”