Here is a list of entrants that were announced ahead of time for the 2021 WWE Royal Rumble matches, followed by a completed list of entrants after the matches had taken place.
Announced (Men)
- Johnny Knoxville (announced on Instagram on January 1, then confirmed by WWE during Day 1)
- Angelo Dawkins (announced during January 3 Raw)
- Montez Ford (announced during January 3 Raw)
- Rey Mysterio (announced during January 3 Raw)
- Dominik Mysterio (announced during January 3 Raw)
- Austin Theory (announced during January 3 Raw)
- Sheamus (announced during January 7 SmackDown)
- Damian Priest (announced on Twitter on January 10)
- AJ Styles (announced on Twitter on January 10)
- Big E (announced during January 10 Raw)
- Happy Corbin (announced on Twitter on January 14)
- Madcap Moss (announced on Twitter on January 14)
- Sami Zayn (announced during January 14 SmackDown)
- Kofi Kingston (announced during January 14 SmackDown)
- Kevin Owens (announced during January 17 Raw)
- Omos (announced on Twitter on January 24)
- Randy Orton (announced on Twitter on January 24)
- Riddle (announced on Twitter on January 24)
- Chad Gable (announced on Twitter on January 24)
- Otis (announced on Twitter on January 24)
- Dolph Ziggler (announced on Twitter on January 24)
- Robert Roode (announced on Twitter on January 24)
- Shinsuke Nakamura (announced on Twitter on January 28)
- Rick Boogs (announced on Twitter on January 28)
- Ricochet (announced during January 28 SmackDown)
Final (Men)
- AJ Styles
- Shinsuke Nakamura
- Austin Theory
- Robert Roode
- Ridge Holland
- Montez Ford
- Damian Priest
- Sami Zayn
- Johnny Knoxville
- Angelo Dawkins
- Omos
- Ricochet
- Chad Gable
- Dominik Mysterio
- Happy Corbin
- Dolph Ziggler
- Sheamus
- Rick Boogs
- Madcap Moss
- Riddle
- Drew McIntyre
- Kevin Owens
- Rey Mysterio
- Kofi Kingston
- Otis
- Big E
- Bad Bunny
- Shane McMahon
- Randy Orton
- Brock Lesnar (WINNER)
Announced (Women)
- Charlotte Flair (announced during January 7 SmackDown)
- Naomi (announced during January 7 SmackDown)
- Rhea Ripley (announced during January 7 SmackDown)
- Nikki ASH (announced during January 7 SmackDown)
- Brie Bella (announced during January 7 SmackDown)
- Nikki Bella (announced during January 7 SmackDown)
- Carmella (announced during January 7 SmackDown)
- Queen Zelina (announced during January 7 SmackDown)
- Lita (announced during January 7 SmackDown)
- Michelle McCool (announced during January 7 SmackDown)
- Kelly Kelly (announced during January 7 SmackDown)
- Dana Brooke (announced during January 7 SmackDown)
- Natalya (announced during January 7 SmackDown)
- Mickie James (announced during January 7 SmackDown)
- Tamina (announced during January 7 SmackDown)
- Shayna Baszler (announced during January 7 SmackDown)
- Summer Rae (announced during January 7 SmackDown)
- Aliyah (announced during January 7 SmackDown)
- Shotzi (announced during January 7 SmackDown)
- Bianca Belair (announced during January 17 Raw)
- Liv Morgan (announced during January 17 Raw)
- Sasha Banks (announced during January 28 SmackDown)
- Sonya Deville (announced during January 28 SmackDown)
Final (Women)
- Sasha Banks
- Melina
- Tamina
- Kelly Kelly
- Aliyah
- Liv Morgan
- Queen Zelina
- Bianca Belair
- Dana Brooke
- Michelle McCool
- Sonya Deville
- Natalya
- Cameron
- Naomi
- Carmella
- Rhea Ripley
- Charlotte Flair
- Ivory
- Brie Bella
- Mickie James
- Alicia Fox
- Nikki ASH
- Summer Rae
- Nikki Bella
- Sarah Logan
- Lita
- Mighty Molly
- Ronda Rousey (WINNER)
- Shotzi
- Shayna Baszler
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