Night of Champions (2011) was a professional wrestling pay-per-view event produced by WWE and presented by WowWee's Light Strike that took place on September 18, 2011 at the First Niagara Center in Buffalo, New York. It was the fourth annual WWE Night of Champions event and the eleventh in the WWE Vengeance/Night of Champions overall chronology.Eight matches took place at the event, seven of which were broadcast live on pay-per-view.