In Comics
Jack Pumpkinhead was one of the Freedom Fighters in the 1995 comic book Oz, created by Ralph Griffth, Stuart Kerr, and Bill Bryan, and published by Caliber Comics. Jack was killed during the company-wide crossover, Daemonstorm, after having been possessed by one of the demons.
Jack also appears in the comic book The Oz/Wonderland Chronicles, created by Ben Avery and Casey Heying, which is published twice a year by Buy Me Toys.
In Neil Gaiman's "Sandman" series a handyman figure named Mervyn Pumpkinhead, clearly modeled on Jack, works for Morpheus in the Dreaming, painting and building dreams.
In issue 101 of Fables, Bufkin the winged monkey finds his way back to Oz's neighboring country Ev. He runs across Jack Pumpkinhead, Sawhorse, and Bungle, and upon hearing of their resistance to the Nome King, pledges to lead them in revolution. This is an allusion to the Baum novel Ozma of Oz and/or the comics series Oz mentioned above.
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