A prolonged, acclaimed career seemed an impossibility when Mellencamp released his first album under the name Johnny Cougar in 1976. As a child in Seymour, Indiana, Mellencamp had suffered a number of setbacks, including being born with a neural tube defect called spina bifida that necessitated a lengthy hospitalization as a baby. As a teenager, he was rebellious, often getting in trouble with the law. He formed his first band at the age of 14, and continued to play throughout his teens. When he was 17, he eloped with Priscilla Esterline, his pregnant girlfriend, and proceeded to try to support his family by working a series of blue-collar jobs. By the time he was 24, he had decided to move to New York City to attempt to break into the music industry.

In New York, Mellencamp became a client of David Bowie's manager, Tony DeFries, who signed him to a lucrative deal with MainMan/MCA. Mellencamp recorded an album of covers called Chestnut Street Incident. Upon receiving the finished album in 1976, he was infuriated to learn that DeFries had billed the singer as Johnny Cougar. Chestnut Street Incident was a bomb and MCA immediately dropped the singer. The fiasco of his first album was enough to sour Mellencamp toward the industry for the remainder of his career. Two years later, he signed with Riva Records, releasing A Biography (1978) to little attention. However, Johnny Cougar (1979) spawned the Top 40 hit "I Need a Lover," which also became an AOR hit for Pat Benatar a few years later. Steve Cropper produced 1980's Nothin' Matters and What If It Did, which contained the Top 30 hits "This Time" and "Ain't Even Done with the Night."

Mellencamp's next album, 1982's American Fool, became his breakthrough, both commercially and musically. More focused than his earlier records, American Fool rocketed to number one on the strength of the number two hit "Hurts So Good" and the number one single "Jack & Diane," both of which were supported by videos that became MTV favorites. The success of American Fool meant that he could add "Mellencamp" to his stage name, and 1983's Uh-Huh became the first album credited to John Cougar Mellencamp. Uh-Huh was released while American Fool was still high on the charts, and it became a hit, peaking at number nine and generating the Top Ten hits "Crumblin' Down" and "Pink Houses," as well as the Top 15 "Authority Song." He supported the album with his first headlining tour.

While he had commercial success, Mellencamp made his bid for critical acclaim with his next album, 1985's Scarecrow. Scarecrow displayed a greater social consciousness and musical eclecticism, resulting in his best-reviewed -- as well as his biggest -- album to date. Peaking at number two, Scarecrow generated the Top Ten singles "Lonely Ol' Night," "Small Town," and "R.O.C.K. in the U.S.A." Following the release of Scarecrow, Mellencamp became an outspoken advocate of the American farmer, organizing Farm Aid with Willie Nelson and Neil Young. He also became known for his anti-corporate stance, refusing to accept tour sponsorship offers from beer and tobacco companies.

Mellencamp continued to explore social commentary and new musical avenues with 1987's The Lonesome Jubilee. Featuring a distinct Appalachian folk and country influence, The Lonesome Jubilee was a melancholy elegy for the forgotten Middle America, and while it was more adventurous than its predecessors, it was another hit, peaking at number six and generating the hits "Paper in Fire," "Cherry Bomb," and "Check It Out." Mellencamp continued to explore American roots music on Big Daddy (1989). While the album received generally good reviews and peaked at number seven, it failed to produce a big single. Two years later, he returned with Whenever We Wanted, which was another moderate hit, peaking at number 17. Human Wheels (1993) received some of Mellencamp's strongest reviews, yet the record didn't generate a hit single and quickly fell down the charts after debuting at number seven.

Mellencamp bounced back into the Top Ten in 1994, when his duet with Me'Shell NdegéOcello on Van Morrison's "Wild Night" peaked at number three. Its accompanying album, Dance Naked, became his biggest album since Big Daddy, going gold months after its release. Mellencamp planned to support the album with an extensive tour, but he suffered a major heart attack in late 1994 that necessitated its cancellation. Mellencamp spent 1995 recuperating, re-emerging in 1996 with Mr. Happy Go Lucky. Produced by Junior Vasquez and demonstrating a slight dance influence, Mr. Happy Go Lucky was greeted with positive reviews and featured the minor hit single "Key West Intermezzo (I Saw You First)," which helped the album go gold. The album was his last for longtime label Mercury, and he moved to Columbia for 1998's John Mellencamp. Rough Harvest, a collection of unreleased material, appeared a year later.

Cuttin' Heads, his second album for Columbia and 20th overall, followed in 2001 and spawned a radio hit with "Peaceful World," featuring neo-soul singer India.Arie on backing vocals. Also in 2001, he won the Billboard Century Award for creative achievement. Inspired by his performance of Robert Johnson's "Stones in My Passway" at an October 2002 tribute concert for the late music journalist Timothy White, Mellencamp recorded a covers album, Trouble No More, in 2003. It was released that summer and topped the Billboard blues chart. The impressive Freedom's Road appeared in 2007, followed by the T-Bone Burnett-produced Life Death Love and Freedom a year later in 2008. An eight-song live set drawn from that album's songs, Life Death Live and Freedom, appeared in 2009, and a deluxe package combining both the original album and the live disc was also released at the same time.

A four-disc box set covering Mellencamp's entire recording career, On the Rural Route 7609 (he released his first album in 1976 -- thus the number in the set's title), appeared in 2010. Also appearing in 2010 was his second collaboration with producer T-Bone Burnett, the critically acclaimed No Better Than This. Mellencamp's next project was an ambitious collaboration with novelist Stephen King. Termed a "Southern gothic musical," Ghost Brothers of Darkland County was scripted by King, with the music coming from Mellencamp, a collaboration that was a bit left-field for both artists. The official set was released in 2012, and included a full audio reading of the musical as staged on two discs, with a third disc of recordings of the songs alone, all of which were again produced by Burnett.