The 2009 Night of Champions was the third annual Night of Champions professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held for wrestlers from the promotion's Raw, SmackDown, and ECW brand divisions—the final to feature ECW. The event took place on July 26, 2009, at the Wachovia Center in Philadelphia, Pennsylvania. The concept of the show was that every championship in the company at the time was defended. All eight matches on the card were championship matches; three were won while five were retained.

This show was considered a supercard, which featured more than one main event match. The main event matches featured were: Jeff Hardy defeating CM Punk for the World Heavyweight Championship, Randy Orton retaining the WWE Championship against Triple H and John Cena, Mickie James winning the WWE Divas Championship against Maryse, and WWE Intercontinental Champion Rey Mysterio retaining his title against Dolph Ziggler. The undercard, featured Chris Jericho and The Big Show defending the Unified WWE Tag Team Championship against The Legacy, Christian defeating Tommy Dreamer for the ECW Championship, Kofi Kingston defending the WWE United States Championship in a six-pack challenge against Montel Vontavious Porter, The Miz, Carlito, Primo, and Jack Swagger, and Michelle McCool defending the WWE Women's Championship against Melina. The event had 267,000 buys, down on the 2008's Night of Champions figure of 273,000 buys.