The Green Gallery was an art gallery that operated between 1960 and 1965 and was located at 15 West 57th Street in Manhattan, New York, United States. The director of the gallery was Richard Bellamy (1927–1998), and it was one of the first uptown galleries to show the work of the downtown New York avant-garde. During the late 1950s and early 1960s the downtown New York art world's avant-garde circle was generally located around the 10th Street Galleries and the Green Gallery began to show many 10th Street artists uptown. Searching for the best kinetic metaphor to describe Richard Bellamy's contribution to his art practice, Green Gallery opening artist Mark di Suvero famously told his dealer of 38 years, "You've been (springboard? (wings?) (slingshot?) to my art."
The Green Gallery opened in 1960 with backing from the art collector Robert Scull (1917–1985). In 1962, Bellamy was introduced to the 22-year-old Sam Green. Amused by the coincidence of their names, Bellamy hired Green on the spot to man the galleries front desk. Art writer John Gruen later described Green Gallery as "an important stepping-stone for every major American Pop artist." The gallery's five-year run spanned a fertile period in the New York art world. Showcasing a new generation of post-Abstract Expressionist artists, diverse in talent and vision, who were giving shape to works that would by the mid-1960s be called Color Field painting, Lyrical Abstraction, Minimalism, Op Art, Fluxus, and Pop Art.