Jeff Parker (born April 4, 1967) is an American jazz and rock guitarist based in Los Angeles. Parker is best known as an experimental musician, working with avant-garde electronic, rock, and improvisational groups.
Parker plays guitar in the post-rock group Tortoise and was a founding member of Isotope 217 and the Chicago Underground Trio in the 1990s and early 2000s. He is a member of the Association for the Advancement of Creative Musicians (AACM) and has worked with George Lewis, Ernest Dawkins, Brian Blade, Joshua Redman, Fred Anderson, and Jason Moran.