Jet Set Radio (originally released in North America as Jet Grind Radio) is a 2000 action game developed by Smilebit and published by Sega for the Dreamcast. The player controls a member of a youth gang, the GGs, as they use inline skates to traverse Tokyo, spraying graffiti, challenging rival gangs, and evading authorities.

Development was headed by director Masayoshi Kikuchi, with art by Ryuta Ueda. The team drew influence from late 1990s Japanese popular culture such as the rhythm game PaRappa the Rapper and the anti-establishment themes in the film Fight Club. The environments were based on Tokyo shopping districts in Shibuya and Shinjuku, with graffiti designed by artists including Eric Haze. Jet Set Radio was the first game to use a cel-shaded art style, developed in response to the team's disappointment with the abundance of sci-fi and fantasy Sega games.

Jet Set Radio received acclaim and is considered one of the best video games for its graphics, soundtrack and gameplay. It won several awards and was nominated for many others. A Game Boy Advance version, developed by Vicarious Visions, was released in 2003, along with versions for Japanese mobile phones. In 2012, Jet Set Radio was rereleased for the Xbox 360, PlayStation 3, iOS, Windows, PlayStation Vita and Android. A sequel, Jet Set Radio Future, was released for the Xbox in 2002.