Oscar Pettiford (September 30, 1922 – September 8, 1960) was an American jazz double bassist, cellist and composer. He was one of the earliest musicians to work in the bebop idiom.

Pettiford was born at Okmulgee, Oklahoma. His mother was Choctaw, and his father was half Cherokee and half African American.

He grew up playing in the family band in which he sang and danced before switching to piano at the age of 12, then to double bass when he was 14. He is quoted as saying he did not like the way people were playing the bass so he developed his own way of playing it. Despite being admired by the likes of Milt Hinton at the age of 14, he gave up in 1941 as he did not believe he could make a living. Five months later, he once again met Hinton, who persuaded him to return to music.