Johnny Cash at Folsom Prison is the first live album by American singer-songwriter Johnny Cash, released on Columbia Records on May 6, 1968. After his 1955 song "Folsom Prison Blues", Cash had been interested in recording a performance at a prison. His idea was put on hold until 1967, when personnel changes at Columbia Records put Bob Johnston in charge of producing Cash's material. Cash had recently controlled his drug abuse problems, and was looking to turn his career around after several years of limited commercial success. Backed by June Carter, Carl Perkins, and the Tennessee Three, Cash performed two shows at Folsom State Prison in California on January 13, 1968. The initial release of the album consists of fifteen songs from the first show and two from the second.

John R. Cash was an American country singer-songwriter. Most of Cash's music contains themes of sorrow, moral tribulation, and redemption, especially songs from the later stages of his career. He was known for his deep, calm, bass-baritone voice, the distinctive sound of his backing band, The Tennessee Three, that was characterized by its train-like chugging guitar rhythms, a rebelliousness coupled with an increasingly somber and humble demeanor, and his free prison concerts. Cash wore a trademark all-black stage wardrobe, which earned him the nickname as the "Man in Black".