John D. Rockerduck is a virtual billionaire duck living in the fake city of Duckburg. Even though he is a duck, he behaves and walks like a human being. He is in a competition against Scrooge McDuck to try to have the role of the richest character of the city, but doesn't manage to get richer than him. John D. Rockerduck is often accompanied with his butler and has a very big safe where he can put his money.

He appeared during the 60's and has often been allied with the Beagle Boys against Scrooge McDuck whereas the Beagle Boys attacked Rockerduck several times. The battle between Rockerduck and his rival also opposes them for the search of new people to have business with, because both of them try to get people who will allow them to get richer.

Jonh D. Rockerduck's father was a rich American with Scot roots who got rich thanks to the gold rush who gave him a very large part of his money.