"The Right to Go Insane" is a song by the American heavy metal band Megadeth, written by Dave Mustaine. It is the final track and second single from their twelfth studio album Endgame, which was released on September 15, 2009. The song was commercially released as a single on April 9, 2010, and a music video was released directed by Bill Fishman, who produced the music video of the band's previous single, "Head Crusher". The music video was based on the real-life events surrounding Shawn Nelson's descent into madness and the famous tank rampage he engaged in which led to his death.

The song was chosen for its potential mainstream accessibility and was well received critically and commercially, becoming Megadeth's first song to chart well on the Hot Mainstream Rock Tracks since "Of Mice and Men" in 2005. It was also featured in a key closing scene of the film Land of the Lost.Roadrunner Records submitted the song to consideration for Best Hard Rock Performance at the 53rd Grammy Awards, but it did not ultimately receive a nomination.

The lyrics of the song, written by Dave Mustaine, are about a man who is being driven mad by financial worries and constant overworking. He faces starvation and eventually loses his mind: "I'm living on the edge / Reality is teetering / My mind is on the brink". The chorus suggests that losing his mind is his only choice, and that the protagonist believes that going insane is one of his rights. In an interview about the 2009 album, Mustaine was quoted as saying that "The Right To Go Insane" is "about having been wiped out, like so many Americans, from the recession and potential depression years of 2000."

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