Regular Show (known as Regular Show in Space during its eighth and final season) is an American animated sitcom created by J. G. Quintel for Cartoon Network. It ran from September 6, 2010, to January 16, 2017, over the course of eight seasons and 244 episodes.

The series follows the daily lives of two 23-year old friends, Mordecai, a blue jay and Rigby, a raccoon, who work at a local park as groundskeepers. Their coworkers are Skips, an immortal yeti, Muscle Man, a green-skinned overweight man, and Hi-Five Ghost, a small ghost. Other characters include Pops, the lollipop-shaped owner of the park, and the duo's boss Benson, a gumball machine. Mordecai and Rigby spend their days slacking off and avoiding work to entertain themselves by any means, which unexpectedly leads to surreal, extreme, and supernatural misconduct.

Many of Regular Show's characters were loosely based on those developed for Quintel's student films at California Institute of the Arts: The Naïve Man from Lolliland and 2 in the AM PM. The former was one of the winners of the 2005 Nicktoons Film Festival and received international attention after being broadcast on Nicktoons Network. Quintel pitched Regular Show for Cartoon Network's Cartoonstitute project, in which the network allowed young artists to create pilots with no notes, which would possibly be optioned as shows.

Regular Show received critical acclaim and became one of Cartoon Network's most successful original series. However, it has also garnered controversy for its dark humor, sexual innuendos, violence, and mature themes. The show was nominated for several awards, including seven Annie Awards, six Primetime Emmy Awards – one of which it won for the episode "Eggscellent" (season 3, episode 17) – and three British Academy Children's Awards. A film adaptation based on the series, titled Regular Show: The Movie, premiered in 2015.

On June 12, 2024, Warner Bros. Discovery announced that a new Regular Show series was greenlit, with Quintel returning as showrunner.