Jeffrey Townes (born January 22, 1965 in Philadelphia, Pennsylvania), also known as DJ Jazzy Jeff or simply Jazz, is an American hip hop, R&B record producer, turntablist and actor. He is best known for his early career with Will Smith as DJ Jazzy Jeff & The Fresh Prince. DJ Jazzy Jeff graduated from John Bartram High School in Philadelphia where he is enshrined in the school's "Wall of Fame".

DJ Jazzy Jeff is not to be confused with Jeffrey Myree from the earlier hip hop group Funky Four Plus One, which in fact filed and won a lawsuit over the name Jazzy Jeff against Jeff Townes and Jive records when they signed DJ Jazzy Jeff & the Fresh Prince.