American singer, guitarist, and songwriter, one of the most popular country music performers of the late 20th century.

Poverty marked Haggard's childhood, and in his teens he began a career of theft and burglary. After his release from San Quentin prison in 1960, he became a professional musician in Bakersfield, an important regional country music centre. He began recording in the early 1960s, and in 1965 he started producing hit recordings regularly for the Capitol label. There is a sombre cast to many of the songs he wrote, including “Mama Tried,” “The Bottle Let Me Down,” and “If We Make It Through December,” that in part reflects his difficult youth; he also wrote “Okie From Muskogee” (1969), his best-known recording, a novelty song that became controversial for its apparent attack on hippies. His repertoire ranged from early jazz and country songs to contemporary tunes, and he often recorded the songs of other writers, including western-swing bandleader Bob Wills, one of his formative inspirations, whom he honoured with the album A Tribute to the Best Damned Fiddle Player in the World (1970). A multi-instrumentalist himself, Haggard was known for the high quality and versatility of his accompanying bands, which by the 1970s included some of Wills's former sidemen.