Ken Vandermark (born September 22, 1964 in Warwick, Rhode Island) is an American jazz composer and saxophone and clarinet player. A fixture on the Chicago-area music scene since the 1990s, Vandermark has earned wide critical praise for his playing and his multilayered compositions, which typically balance intricateorchestration with passionate improvisation. He has led or been a member of many groups, has collaborated with many other musicians, and was awarded a 1999 MacArthur Fellowship. He plays tenor saxophone, clarinet and bass clarinet; in about 2000, added baritone saxophone to his arsenal, and often favors the instrument, particularly in larger ensembles. He was also a member of NRG Ensemble.