The Joker is a supervillain who appears in American comic books published by DC Comics. The Joker was planned to be killed off during his initial appearance, he was spared by editorial intervention, allowing the character to endure as the archenemy of the superhero Batman.

One of the most iconic characters in popular culture, the Joker has been listed among the greatest comic book villains and fictional characters ever created. His likeness has appeared on merchandise such as clothing and collectible items, and he has inspired real-world structures (such as theme park attractions) and been referenced in various media. The Joker has been adapted in live-action, animated, and video game incarnations.