On “Seinfeld,” Superman is the comic-book superhero whose figurines, logos, and references recur throughout Jerry’s apartment and the series.
The most recognizable example is the Superman statue displayed in Jerry’s apartment, along with a Superman magnet on the refrigerator. The character also comes up in dialogue, including Jerry and George’s debate about whether Superman has a sense of humor in “The Stock Tip.”
The references reflect Jerry Seinfeld’s well-known affection for the Man of Steel, but the show did not necessarily place a Superman reference in every episode. That idea became a popular fan claim because the apartment’s background props were easy to spot and the character appeared repeatedly in dialogue and visual jokes.
A related Superman gag appears in “The Bizarro Jerry,” where Jerry’s counterpart has a Bizarro statue instead of Jerry’s usual Superman figure. The Flash, Spider-Man, and Batman may be associated with other superhero stories, but none has the same recurring connection to Jerry’s apartment.