G. P. Putnam's Sons is an American book publisher based in New York City, New York. Since 1996, it has been an imprint of the Penguin Group.

George Palmer Putnam was an American publisher and author. He founded the firm G. P. Putnam's Sons and Putnam's Magazine. He was an advocate of international copyright reform, secretary for many years of the Publishers' Association, and founding superintendent of the Metropolitan Museum of Art.