Jack Johnson (also known as A Tribute to Jack Johnson on reissues) is a studio album and soundtrack by the American jazz trumpeter, composer, and bandleader Miles Davis. It was released on February 24, 1971, by Columbia Records.

The album was conceived by Davis for Bill Cayton's documentary of the same name, on the life of boxer Jack Johnson. Its two 25-minute-plus tracks were produced from recordings made on February 18 and April 7, 1970, at 30th Street Studio in New York City. Davis was inspired by the political and racial subtext of Johnson's saga as well as the hard rock and funk sounds of his own era, leading a rock-inspired line-up of musicians in the studio: guitarists John McLaughlin and Sonny Sharrock, keyboardists Herbie Hancock and Chick Corea, saxophonist Steve Grossman, bass clarinetist Bennie Maupin, electric bassist Michael Henderson, and drummers Jack DeJohnette and Billy Cobham.

Jack Johnson performed modestly on the record charts and was generally well received by contemporary critics. It has since been regarded as one of the best albums from Davis' career and the jazz-rock genre, as well as his most overt venture into rock music. In 2003, the original album was reissued as part of The Complete Jack Johnson Sessions, a five-disc box set featuring previously unreleased music from the recording sessions.

In 1970, Davis was asked by boxing promoter Bill Cayton to record music for a documentary he was producing, on the life of boxer Jack Johnson. Johnson's saga resonated personally with the musician, who wrote in the album's liner notes of Johnson's mastery as a boxer, his affinity for fast cars, jazz, clothes, and beautiful women, his unreconstructed blackness, and his threatening image of large black manhood to white men. The resulting album, Jack Johnson, was the second film score Davis had composed, after Ascenseur pour l'échafaud in 1957.

The music recorded for Jack Johnson reflected Davis' interest in the eclectic jazz fusion of the time while foreshadowing the hard-edged funk that would fascinate him in the next few years. Having wanted to put together what he called "the greatest rock and roll band you have ever heard", Davis played with a line-up featuring guitarists John McLaughlin and Sonny Sharrock, keyboardists Herbie Hancock and Chick Corea, saxophonist Steve Grossman, bass clarinetist Bennie Maupin, and drummers Jack DeJohnette and Billy Cobham. The album's two tracks were mainly drawn from one session on April 7, 1970, which producer Teo Macero edited together with Davis's recordings from a February 1970 session.

The first track, "Right Off", was constructed from several takes and a solo Davis had recorded in November 1969. It also contains a riff based on Sly and the Family Stone's "Sing a Simple Song", most prominently at 18:44. Much of the track "Yesternow" is built around a slightly modified version of the bassline from the James Brown song "Say It Loud – I'm Black and I'm Proud".

"Right Off" comprises a series of improvisations based on a B♭ chord, but changes after about 20 minutes to an E chord. "Yesternow" has a similar B♭ ostinato and shifts to C minor. It concludes with a voiceover by actor Brock Peters: "I'm Jack Johnson, heavyweight champion of the world. I'm black. They never let me forget it. I'm black all right. I'll never let them forget it." Liner notes accompanying a later release of the album provide a description of the music:

Michael Henderson launches into an enormous boogie groove with Billy Cobham and John McLaughlin. Miles immediately leaves the control room to join in with them. He achieved exactly what he wanted for the soundtrack by creating the effect of a train going at full speed (which he compared to the force of a boxer). By chance, Herbie Hancock had arrived unexpectedly and started playing on a cheap keyboard that a sound engineer quickly connected.