Oh Yeah! Cartoons is an American animation showcase that appeared on the Nickelodeon cable channel. Oh Yeah! was an animation project guided by Fred Seibert, former Creative Director of MTV Networks and President of Hanna-Barbera. Produced by Frederator Studios, it ran as part of Nickelodeon's Nicktoons lineup, and in its second season, was hosted by Kenan Thompson of All That and Kenan & Kel fame; Then later by Josh Server, also from All That, for its third season. Bill Burnett composed the show's theme music. Oh Yeah! Cartoons was distributed by Nelvana outside of the United States.

In terms of sheer volume, Oh Yeah! Cartoons remains TV's biggest animation development program ever. Giving several dozen filmmakers the opportunity to create nearly 100 seven-minute cartoons, the series eventually yielded three dedicated half-hour spin-offs and two co-series made by Billionfold Inc.:

Nickelodeon's Oh Yeah! half-hour featured in its first season, a total of 39 brand new seven-minute cartoons in 13 episodes, surpassing the number of new cartoons and characters on any other single network. In its full run, Oh Yeah! Cartoons featured and produced over 99 cartoons and 54 characters.