Young Justice is an American superhero animated television series developed by Brandon Vietti and Greg Weisman for Cartoon Network and distributed by Warner Bros. Domestic Television. The show, instead of a direct adaptation of Peter David, Todd Dezago and Todd Nauck's Young Justice comic series (despite the title), is an original story with a focus on teenage and young adult superheroes.

The series follows the lives of teenage superheroes and sidekicks, namely Robin, Kid Flash, Aqualad, Superboy, Miss Martian, and Artemis, who are of a fictional covert operation group. Within the show, "the Team" is a group of young heroes attached to the famous adult team, the Justice League, but operating outside of the bureaucracy that constrains the more established superhero team. The main setting is a fictional universe apart from the DC Animated Universe and other continuities, designated at one point as Earth-16 in the DC Comics multiverse. It is set in a time period in which superheroes are a relatively recent phenomenon, and supervillains have all began working in tandem in a conspiracy on behalf of a cabal of villains known as the Light.

The series debuted with an hour-long special on November 26, 2010. Young Justice premiered on September 9, 2011, on Teletoon in Canada. After airing its second season, subtitled Invasion, the series was canceled in early 2013. In November 2016, Warner Bros. Animation announced that the series would be returning for a third season, subtitled Outsiders, which premiered on January 4, 2019, on the DC Universe streaming service. In July 2019, DC Universe renewed the series for a fourth season, later subtitled Phantoms and eventually moved to HBO Max. The fourth season premiered on October 16, 2021, and ended its complete season run on June 9, 2022.