Jack DeJohnette (born August 9, 1942) is an American jazz drummer, pianist, and composer.
An important figure of the fusion era of jazz, DeJohnette is one of the most influential jazz drummers of the 20th century. DeJohnette’s style incorporates elements of jazz, free jazz, world music, and R&B, contributing to him being one of the most highly regarded and in-demand drummers. Initially a traditional grip player, later he switched to matched grip due to a problem with tendinitis.

His style is wide-ranging, and while capable of playing convincingly in any modern idiom, he always maintains a well-defined voice. DeJohnette has a remarkably fluid relationship to pulse. His timing is excellent; even as he pushes, pulls, and generally obscures the beat beyond recognition, a powerful sense of swing is ever-present. His tonal palette is huge and possesses a comprehensive musicality rare among jazz drummers. Jack DeJohnette is a very influential fusion drummer and has inspired hundreds of drummers that come after him.