Greg Cohen (born June 13, 1953) is a jazz bassist. Best known for his work with John Zorn's Masada quartet; more recently he has been touring with Ornette Coleman, and performed on Coleman's much-praised Sound Grammar album. Cohen has also often played traditional jazz, including work with Ken Peplowski, Kenny Davern and the filmmaker/clarinettist Woody Allen. He has worked with many musicians, including Tom Waits, David Byrne, and Elvis Costello. Cohen is a bass professor and the head of string department at the Jazz Institute Berlin. He has been a resident of Summit, New Jersey.