Keith Jarrett (born May 8, 1945 in Allentown, Pennsylvania, USA) is an American pianist and composer. He is considered one of the most important jazz pianists, renowned for his elaborate solo improvisations.

He began piano lessons at the age of two and played for the first time on stage at the age of seven. In 1962 he played a self-composed two-hour concert, without the benefit of any prior formal instruction in orchestration or composition. After working with a wide variety of musicians, including Chet Baker, Lee Konitz and Art Blakey, he founded his own band in 1968 with Charlie Haden and Paul Motian. In 1971-1976 Dewey Redman (saxaphone) joined the group and they played under the name the American Quartet. His work with Miles Davis between 1969 and 1971 gave his career an additional boost and the oportunity to play solo concerts such as the "Köln Concert" (1975, Cologne, Germany), honoured by Time Magazine as Album of the year.

Since the early 1970s, he has enjoyed a great deal of success, both artistic and commercial, in both classical and jazz music as a group leader and a solo performer. His improvisation technique combines jazz, classical, gospel, blues, and various ethnic-folk musics. He is considered by some, to be the "Bach" of jazz music. This title may have come from his recording of Bach`s Goldberg Variations, which, although it received many awards, was not entirely approved by critics.

In the 1990`s he suffered CFS (Chronic fatigue syndrome) only to take up the piano again in 1998. He now works in a trio form with Gary Peacock and Jack DeJohnette.

In 2003 he received the Erhielt "Polar Music Prize"--the alternative Nobel prize for music.

Jarrett stated in a 2005 TV interview that his music is influenced by the teachings and philosophy of Georges I. Gurdjieffs, whom he honoured in "Sacred Hymns" (ECM, 1980). This philosophy informs many of his non-musical beliefs as well.

In September 2005 Jarrett performed his first solo concert in North America in more than ten years at Carnegie Hall in New York City. The concert was released a year later as a double CD set (The Carnegie Hall Concert) and is, up to now, his last production.