Sweetheart of the Rodeo is the sixth album by the American rock band the Byrds, released in August 1968 by Columbia Records. Recorded with the addition of country rock pioneer Gram Parsons, it became the first album widely recognized as country rock as well as a seminal progressive country album, and represented a stylistic move away from the psychedelic rock of the band's previous LP, The Notorious Byrd Brothers. The Byrds had occasionally experimented with country music on their four previous albums, but Sweetheart of the Rodeo represented their fullest immersion into the genre up to that point in time. The album was responsible for bringing Parsons, who had joined the Byrds in February 1968 prior to the start of recording, to the attention of a mainstream rock audience for the first time. Thus, the album is an important chapter in Parsons' crusade to make country music fashionable for a young audience.

The album was conceived as a history of 20th century American popular music, encompassing examples of country music, jazz and rhythm and blues, among other genres. However, steered by the passion of the little-known Parsons, this concept was abandoned early on and the album instead became purely a country record. The recording of the album was divided between sessions in Nashville and Los Angeles, with contributions from session musicians including Lloyd Green, John Hartford, JayDee Maness, and Clarence White. Tension developed between Parsons and the rest of the band, guitarist Roger McGuinn especially, and some of Parsons' vocals were re-recorded, partly due to legal issues. By the time the album was released Parsons had left the band. The Byrds' move away from rock and pop towards country music elicited a great deal of resistance and hostility from the ultra-conservative Nashville country music establishment, who viewed the Byrds as a group of hippies attempting to subvert country music.

Upon its release, the album reached number 77 on the Billboard Top LPs chart, but failed to reach the charts in the United Kingdom. Two attendant singles were released during 1968, "You Ain't Goin' Nowhere", which achieved modest success, and "I Am a Pilgrim", which failed to chart. The album received mostly positive reviews in the music press, but the band's shift away from psychedelic music alienated much of its pop audience. Despite being the least commercially successful Byrds' album to date upon release, Sweetheart of the Rodeo is today considered to be a seminal and highly influential country rock album.