The 2021 Survivor Series was the 35th annual Survivor Series professional wrestling pay-per-view (PPV) and livestreaming event produced by WWE. It was held for wrestlers from the promotion's Raw and SmackDown brand divisions. The event took place on November 21, 2021, at the Barclays Center in Brooklyn, New York, and was the first Survivor Series to livestream on Peacock. The theme of the event was brand supremacy and featured wrestlers from the two brands against each other; this was the final Survivor Series to carry the brand supremacy theme as well as the traditional Survivor Series matches.

Seven matches were contested at the event, including one on the Kickoff pre-show. The card was highlighted by two traditional Survivor Series elimination matches: Raw's men's and women's teams were victorious over SmackDown's. In the main event match, SmackDown's Universal Champion Roman Reigns defeated Raw's WWE Champion Big E. In other prominent matches, Raw Tag Team Champions RK-Bro (Randy Orton and Riddle) defeated SmackDown Tag Team Champions The Usos (Jey Uso and Jimmy Uso), and in the opening bout, Raw Women's Champion Becky Lynch defeated SmackDown Women's Champion Charlotte Flair. The event also commemorated the 25th anniversary of The Rock's WWE debut at the 1996 Survivor Series where a 25-man dual-branded battle royal took place in honor of the occasion; Raw's Omos won by last eliminating SmackDown's Ricochet. Raw won brand supremacy by winning five of the seven matches, only excluding the pre-show and main event matches. The event also had a promotional tie-in with the Netflix film Red Notice, which stars The Rock, though The Rock himself did not appear at the event despite rumors before the show suggesting that he would have appeared.