Curt Valentin was a German-Jewish art dealer known for handling modern art, particularly sculpture, and works classified as "degenerate" by the Nazi regime in pre-war Germany.
In 1934, he worked at Karl Buchholz Gallery, Hamburg. In 1937, Valentin emigrated to the U.S. with a sufficient number of modern German paintings to open a gallery under the Buchholz name in New York City. He had permission to sell German art in America, from the Nazi authorities. In 1951, the gallery was renamed the Curt Valentin Gallery. His gallery operated from 1951, until a year after his death in 1954, and handled works by many notable artists including Alexander Calder, Henry Moore, Marino Marini, and Jacques Lipchitz.