Knox Martin (born February 12, 1923) is an American painter, sculptor and muralist.
Born in Barranquilla, Colombia, he studied at the Art Students League of New York from 1946 till 1950. He is one of the leading members of the New York School of artists and writers. He lives and works in New York City.
Martin’s work is included in the collections of Whitney Museum of American Art, Museum of Modern Art, Hirshhorn Museum and Sculpture Garden, Art Students League of New York, Brooklyn Museum of Art, National Academy of Design, National Arts Club, New York University, Addison Gallery of American Art, Albright-Knox Art Gallery, Art Institute of Chicago, Art Museum of Southeast Texas, Baltimore Museum of Art, Berkeley Art Museum, Blanton Museum of Art, Boca Raton Museum of Art, Chrysler Museum of Art, Corcoran Gallery of Art, Dallas Museum of Art, Davis Museum at Wellesley College, Denver Art Museum, Hand Art Center, Herbert F. Johnson Museum of Art, Heckscher Museum of Art, Hofstra University Museum, Indianapolis Museum of Art, Ithaca Museum, Lowe Art Museum, George Washington University, Montclair Art Museum, Minneapolis Institute of Arts, Newark Museum, Oklahoma City Museum of Art, Portland Art Museum, Provincetown Art Association and Museum, Reading Public Museum, Southern Alleghenies Museum of Art, Springfield Art Museum, The Museum of Fine Arts, Houston, Toledo Museum of Art, University of Kentucky Art Museum, University of Maine Museum of Art, Weatherspoon Art Museum, William Benton Museum of Art, Israel Museum, Ludwig Museum in Budapest, and the Bibliothèque Nationale.
In 2002 Martin was named to the National Academy of Design.