Seymour Lipton (6 November 1903 – 15 December 1986) was an American abstract expressionist sculptor. He was a member of the New York School who gained widespread recognition in the 1950s. He initially trained as a dentist but focused on sculpture from 1932. His early choices of medium changed from wood to lead and then to bronze, and he is best known for his work in metal. He made several technical innovations, including brazing nickel-silver rods onto sheets of Monel to create rust resistant forms.