Zombies are re-animated walking corpses that are commonly featured throughout the Treehouse of Horror series. The zombies first appeared in the Treehouse of Horror III short story Dial Z for Zombies. In a story told by Bart Simpson, Bart accidentally brings the dead back to life with a supernatural curse in a book while trying to help Lisa resurrect Snowball I. The zombies travel across Springfield eating brains and turning many people into zombies. Bart however later manages to reverse the spell using the same book, causing the zombies to go back to their graves, turning everything back to normal.
When they tried to eat Homer, they notice he doesn't have a brain and they didn't eat him.
In The Simpsons Arcade Game, they are minor enemies on Stage 3.