The 2003 Vengeance was the third annual Vengeance professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held exclusively for wrestlers from the promotion's SmackDown! brand division. The event took place on July 27, 2003, at the Pepsi Center in Denver, Colorado.

Eight professional wrestling matches were scheduled on the event's card. The main event was a Triple Threat match for the WWE Championship, in which Kurt Angle defeated WWE Champion Brock Lesnar and Big Show to win the championship. Two featured bouts were scheduled on the undercard where WWE Chairman Vince McMahon defeated Zach Gowen and The Undertaker defeated John Cena.

Vengeance had an attendance of approximately 9,500 and received about 322,000 pay-per-view buys. This event helped WWE increase its pay-per-view revenue by $6.2 million from the previous year.