Technical Abstract: New cultivars of switchgrass have been released in recent years but information on their performance and nutritive value in the northeast U.S. is needed for producer recommendations. Our objective was to determine the performance and nutritive value of switchgrass cultivars under grazing and clipping management. In 1999, Cave-in-Rock, Trailblazer, and Shawnee switchgrass were established in replicated plots at Rock Springs, PA and in replicated pastures on a farm in southeastern PA. In 2000 and 2001, two-cut and three-cut clipping treatments were imposed at Rock Springs. At the southeast PA farm, the switchgrass pastures were grazed three or four times per year during 2000 to 2004. Forage yield was determined before each grazing. Crude protein, neutral detergent fiber, and digestible neutral detergent fiber were determined on samples from each harvest. There were small and inconsistent differences among cultivars in yield and nutritive value. There was much more variation among years and management treatments than among switchgrass cultivars in forage yield and nutritive value. The Trailblazer cultivar appeared to suffer from leaf diseases and lodging during wet years. Cave-in-Rock and Shawnee are equally suited for Pennsylvania and similar areas in the northeast.