Edward Rudolph “Butch” Warren Jr. (August 9, 1939 – October 5, 2013) was an American jazz bassist who was active during the 1950s and 1960s.

Warren’s mother was a typist at the CIA. His father, Edward Sr., was an electronics technician who played piano and organ part-time in clubs in Washington, D.C; his uncle, Quentin — actually the same age as Butch — played guitar. The Warren home was often visited by jazz musicians Billy Hart, Jimmy Smith, and Stuff Smith. The first time Butch Warren played bass was at home on an instrument left by Billy Taylor, who had played bass for Duke Ellington. Warren has cited Jimmy Blanton, the innovative and virtuoso bassist with Ellington from 1939 to 1941, as his biggest inspiration.

Warren began playing professionally at age 14 in a Washington, D.C. band led by his father. He later worked with other local groups, including that of Stuff Smith, as well as with altoist and bandleader Rick Hendersonat the Howard Theatre.