Harry's uncle.He is the owner of Grunnings Drill Firm and has a wife called Petunia and a son called Dudley.

He is very crule to Harry, he makes him sleep in the cupboard under the stairs when he was younger but then locks him in his bedroom, put bars on his window so that he could not send letters to his friends and puts a cat flap in the door so that Petunia can slip trays of food in for him to eat.