Gary Peacock (May 12, 1935 – September 4, 2020) was an American jazz double bassist. He recorded a dozen albums under his own name, and also performed and recorded with major jazz figures such as Albert Ayler, Paul Bley, and Bill Evans. In addition, he recorded over twenty albums with Keith Jarrett's Standards Trio, which also featured drummer Jack DeJohnette, and which existed for over 30 years. DeJohnette stated that he admired Peacock's "sound, choice of notes, and, above all, the buoyancy of his playing." Pianist Marilyn Crispell called Peacock a "sensitive musician with a great harmonic sense."