The Museum’s holdings now consist of more than 2,600 works ranging from early nineteenth-century landscape paintings through American Impressionism and into the twentieth- and twenty-first centuries.
The light and landscape of Eastern Long Island have drawn artists to the region since the Long Island Railroad extended its service to Southampton in 1870, and the Museum collection has notable holdings of the work of many of them, including more than 40 paintings and works on paper of William Merritt Chase , and 250 works by Fairfield Porter.
Others in the collection include Childe Hassam, John Sloan, James Whistler, Dan Flavin, and John Chamberlain, Jackson Pollock, Lee Krasner, Willem de Kooning, and Esteban Vicente. Modern and contemporary artists represented include Larry Rivers, Jane Freilicher, Roy Lichtenstein, April Gornik, Cindy Sherman, Eric Fischl, and Dorothea Rockburne, Ross Bleckner, Chuck Close, Elizabeth Peyton, Jack Youngerman, and Joe Zucker..
Works created between 1950 - 1969 include photographs, letters, and memorabilia