The Ren & Stimpy Show (also known simply as Ren & Stimpy) is an American animated television series created by Canadian animator John Kricfalusi. Originally produced by Spümcø for Nickelodeon, the series aired from August 11, 1991, to December 16, 1995, with a total of five seasons and 51 episodes, the 52nd premiering on October 20, 1996 on MTV. The series follows the adventures of the title characters: Ren Höek, an emotionally unstable and sociopathic Chihuahua; and Stimpy, a good-natured yet dimwitted cat.

The Ren & Stimpy Show was one of Nickelodeon's first original animated series—known as "Nicktoons"—alongside Rugrats and Doug. As of 2025, 37 episodes are available to watch on Paramount+.

A revival for adult audiences, Ren & Stimpy "Adult Party Cartoon", was produced by Kricfalusi and Spümcø and aired in 2003 on Spike TV. Only three episodes were aired before the series was canceled due to negative reviews, with three additional episodes being released straight to DVD. On August 5, 2020, Comedy Central announced that they had ordered a reboot of the series to be produced without the involvement of Kricfalusi, this was later titled to be Ren & Stimpy.

Please note that both Adult Party Cartoon or the 2024 revival are not to be mentioned on this wiki.