"Pest of the West" is the 16th episode of the fifth season and the 96th overall episode of the American animated television series SpongeBob SquarePants. In this episode, SpongeBob finds that he is a distant relative of SpongeBuck SquarePants, a sheriff from Bikini Bottom's past town who helped save the citizens from the quickest whip draw in town, the evil Dead Eye Plankton. It was written by Luke Brookshier, Tom King, Steven Banks and Richard Pursel, with Andrew Overtoom and Tom Yasumi serving as animation directors. Brookshier and King also functioned as storyboard directors.

Pest of the West originally aired on Nickelodeon in the United States on April 11, 2008, and became available on DVD four days later. It included the song "Idiot Friends," written by Tom Kenny and Andy Paley, which was later released on the album called SpongeBob's Greatest Hits in 2009. Upon release, the episode garnered a total of 6.1 million viewers, and was met with positive reviews from media critics.