"Bart the Bad Guy" is the 14th episode of the thirty-first season of the American animated television series The Simpsons, and the 676th episode overall. It aired in the United States on Fox on March 1, 2020. The episode was written by Dan Vebber and was directed by Jennifer Moeller.

The thirty-first season of the animated television series The Simpsons premiered on Fox in the United States on September 29, 2019, and ended on May 17, 2020. Al Jean continues as showrunner, a position he has held since the thirteenth season. Matt Selman also contributed as showrunner for the episodes "Go Big or Go Homer", "Livin La Pura Vida", "Thanksgiving of Horror", "The Miseducation of Lisa Simpson", "Bart the Bad Guy", "Highway to Well" and "The Hateful Eight-Year-Olds".