Unforgiven 2001 was the fourth Unforgiven PPV. It was presented by Clearasil and took place on September 23, 2001 at the Mellon Arena in Pittsburgh, Pennsylvania.

The main event was a match for the WWF Championship with Alliance representative Stone Cold Steve Austin defending the title against WWF representative Kurt Angle. Two predominant matches were The Rock versus Booker T and Shane McMahon in a Handicap match for the WCW Championship, and Rob Van Dam versus Chris Jericho for the WWF Hardcore Championship.

The undercard featured Tajiri versus Rhino for the WCW United States Championship, Brothers of Destruction versus KroniK for the WCW Tag Team Championship, Edge versus Christian for the WWF Intercontinental Championship, Perry Saturn versus Raven and Dudley Boyz versus Big Show and Spike Dudley, Lance Storm and The Hurricane and Hardy Boyz in a Fatal Four-Way Elimination match for the WWF Tag Team Championship.