Bobbie Lee Nelson (January 1, 1931 – March 10, 2022) was an American pianist and singer, the elder sister of Willie Nelson, and a member of his band, Willie Nelson and Family. When she was five, her grandmother taught her to play keyboards with a pump organ, and after successful appearances at gospel conventions held in Hillsboro, Texas, her grandfather bought her a piano.

Nelson married Bud Fletcher when she was sixteen. He established a band called The Texans, which she and her brother joined. The group later dissolved in 1955 after she divorced Fletcher. His death six years later resulted in her suffering a breakdown and briefly losing custody of their children. In 1965 she moved to Nashville, Tennessee, after her third marriage failed. She played in restaurants and different venues until she was called by her brother from New York in 1973 for a session. She joined Willie Nelson on the piano during his sessions with Atlantic Records, that produced The Troublemaker, Shotgun Willie and Phases and Stages. The same year she joined The Family full-time and began touring with her brother.