Sasuke Uchiha is a fictional character in the Naruto universe created by Masashi Kishimoto and developed into a media franchise, consisting of a series of manga, anime, soundtracks, OVAs, movies, video games, and other collectibles. He was created as a rival and foil to the series' titular character, Naruto Uzumaki, with his design causing difficulties for Kishimoto during drawing the manga scenes, although he has grown to enjoy drawing Sasuke.

In the anime and manga, Sasuke is a member of the Uchiha clan, a highly skilled clan of ninjas allied to the village of Konohagakure. His primary motivation throughout the series is to avenge the destruction of his entire clan by killing his brother, Itachi Uchiha, a task he pursues at all costs. While he was initially cold and singularly driven by his revenge, he becomes more empathetic through his relationships with other characters, notably Naruto Uzumaki, whom he comes to consider as a rival. Sasuke has additionally appeared in two of the featured movies in the series, Naruto the Movie: Ninja Clash in the Land of Snow and Naruto the Movie 2: Great Clash! The Illusionary Ruins at the Depths of the Earth, as well as several other media relating to the series, including several video games and OVAs.

Several anime and manga publications have provided acclaim and criticism of Sasuke's character. While many reviewers have noted his cold and detached attitude and abilities, he has been viewed as a stereotypical "rival" in the mold of several similar characters in other shōnen manga. His personality has also been subject to criticism, with many finding it difficult to like or sympathize with Sasuke's character; IGN jokingly labeled Sasuke as an "emo-kid." Nevertheless, Sasuke has been highly popular with the Naruto reader base, placing high in several popularity polls. Merchandise based on Sasuke has also been released, including action figures and plush dolls.