Jeff Parker is an American jazz and rock guitarist based in Chicago. Parker is best known as an experimental musician, working with avant-garde electronic, rock, and improvisational groups.
Parker currently plays guitar in the post-rock group Tortoise and also played with the ensembles Isotope 217 and the Chicago Underground Trio in the 1990s and early 2000s. He has also worked with the Association for the Advancement of Creative Musicians, as well as with jazz musicians such as Ted Sirota, Ernest Dawkins and George Lewis . He released his first solo effort in 2003.