"You Know You're Right" is a song by the American grunge band Nirvana. It is the first song on its compilation album, Nirvana (2002), and the last song recorded by the band, before frontman Kurt Cobain's death.

"You Know You're Right" was written in 1993, making it one of the last known Kurt Cobain compositions. For years, it was known from only a bootlegged live version, recorded on October 23, 1993 at the Aragon Ballroom in Chicago, Illinois, and from a performance of the song by the American grunge band Hole (fronted by Cobain's widow, Courtney Love) during the band's MTV Unplugged set in 1994.

A studio version of the song was recorded at Nirvana's final session, on January 30, 1994 at Robert Lang Studios in Seattle, Washington, but remained locked away from fans for years following Cobain's death. This recording became the object of much legal wrangling between Love and surviving Nirvana bandmates Dave Grohl and Krist Novoselic. Grohl and Novoselic had wanted the song for a planned Nirvana box set, but Love blocked its release, and a battle over Nirvana's legacy ensued.

Love maintained that "You Know You're Right" would have been "wasted" on a box set, and would be better-suited to a single-disc collection similar to The Beatles' 1. Her lawsuit called the song a "potential 'hit' of extraordinary artistic and commercial value," and her manager asserted that a release with the song could sell 15 million copies. Novoselic revealed that he did not necessarily disagree with Love: "I've always considered everything she said. We've considered it and agreed and said, 'Hey, that's a great idea, Courtney.' I tried to get along with Courtney as best I could, but there's only so much you can do."

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