Justice League is an American animated television series which ran from November 17, 2001 to May 29, 2004 on Cartoon Network. The show was produced by Warner Bros. Animation. It is based on the Justice League of America and associated comic book characters published by DC Comics. It serves as a sequel to Batman: The Animated Series and Superman: The Animated Series, as well as a prequel to Batman Beyond, and is the seventh series of the DC Animated Universe. After two seasons, the series was rebranded as Justice League Unlimited, a successor series which aired for three seasons.

The DC Animated Universe is a shared universe centered on a group of animated television series based on DC Comics and produced by Warner Bros. Animation. It began with Batman: The Animated Series in 1992 and ended with Justice League Unlimited in 2006. The associated media franchise also includes theatrical and direct-to-video feature films, as well as shorts, comic books, video games, and other multimedia adaptations.