Gary Peacock (born May 12, 1935, in Burley, Idaho, United States) is an American jazz double-bassist.

After military service in Germany, in the early sixties, he worked on the west coast with Barney Kessel, Bud Shank, Paul Bley and Art Pepper, then moved to New York. He worked there with Bley, the Bill Evans Trio (with Paul Motian), and Albert Ayler‘s trio with Sunny Murray. There were also some live dates with Miles Davis, as a temporary substitute for Ron Carter.