Atiim Kiambu Barber (born April 7, 1975 in Roanoke, Virginia) is an American Football player (running back) for the New York Giants. His identical twin brother Ronde Barber is a cornerback for the Tampa Bay Buccaneers. He played college football at the University of Virginia.

Barber was drafted in the 2nd round of the 1997 NFL Draft by the Giants. Primarily drafted due to his ability to be a 3rd down, "change of pace" back, he has since bulked up and has been a standout starting running back. For the 2004 season, he was the NFL's top yardage gainer from the line of scrimmage. On January 2, 2005, Tiki broke Rodney Hampton 's Giants' all-time rushing record and Joe Morris's single-season rushing record in the same game. He was named to the Pro Bowl for the first time in 2005.