Histeria! is an American animated series created by Tom Ruegger and produced by Warner Bros. Television Animation. Unlike other animated series produced by Warner Bros. in the 1990s, Histeria! was an explicitly educational program created to meet FCC requirements for educational/informational content for children.

Histeria! aired on Kids' WB from September 14, 1998 to March 31, 2000, and continued to air reruns until August 30, 2001. The show was presented as a Saturday Night Live-style sketch comedy, with its cast often filling the roles of historical figures. It was to be WB's most ambitious project since Animaniacs. Like the aforementioned series, 65 episodes were originally going to be made, but due to being $10 million over budget, only 52 episodes were completed before production of the series was canceled in March 2000. Due to the high production costs, footage from previous episodes was often re-used and re-timed to match newly recorded audio, as well as several non-educational segments being used as filler. More recently, the show was aired on In2TV, first from March to July 2006, and then it returned in October of that year. In January 2009, all of the episodes were taken off the site. MeTV Toons included the program as part of its educational/informational slate when it launched on June 25, 2024.