Lex Luthor is a DC Comics supervillain and Superman's archenemy.

Luthor may also refer to related fictional characters:

Alexander Luthor Jr., from an alternate universe Clark Luthor, an alter ego of Ultraman Lena Luthor, Lex's younger sister, half-sister, or daughter, depending on the version Lenny Luthor, Lex's nephew in the movie Superman IV: The Quest for Peace Lionel Luthor, Lex's father in the television series Smallville Alexis Luthor, a 31st-century descendant of Lex Luthor and a villain in the TV series Legion of Super Heroes Alexis Luthor, the daughter of Lex Luthor on Earth-16 who has appeared in The Multiversity "Luthors", an episode of the TV series Supergirl

See also Luther (disambiguation)