Jack Pumpkinhead is a fictional character from the Oz book series by L. Frank Baum. He first appeared in The Marvelous Land of Oz. Jack's tall figure is made from tree limbs and jointed with wooden pegs. He has a jack o'lantern for a head which is where he gets his name.
Jack was made by a little boy named Tip (Princess Ozma in the form of a boy) to scare his guardian, an old witch named Mombi. From Mombi's chest he took some old clothes for Jack; purple trousers, a red shirt, a pink vest with white polka dots, and stockings, to which he added a pair of his shoes. However, instead of being frightened, when Mombi saw Jack she almost smashed him to pieces, but then she decided to test her new Powder of Life on him. The powder worked and Jack came to life.
Jack is not known for his intelligence which seems to depend on the quality and number of the seeds in his pumpkin-head at that time. However he does manages to come up with random bits of wisdom and common sense.