Quentin "Butter" Jackson (January 13, 1909 in Springfield, Ohio – October 2, 1976 in New York City) was an American jazz trombonist. In the early stage of his career, he worked with Cab Calloway. Later, he was a member of the Duke Ellington Orchestra and worked with Charles Mingus, Kenny Burrell, and others.
On her album Dinah Sings Bessie Smith, Dinah Washington did a version of Bessie Smith's "Trombone Cholly" with Jackson on the horn, under the title "Trombone Butter".