W
- Wakanda in Fantastic Four #52
- War Machine (James Rupert Rhodes)
- as James "Rhodey" Rhodes in Iron Man #118, January 1979
- as Iron Man in Iron Man #170, May 1983
- as War Machine in Iron Man #282, September 1992
- Warlord Krang in Fantastic Four Annual #1, 1963
- Wasp in Tales to Astonish #44
- The Watchers in Fantastic Four #13
- Weapon Omega in Alpha Flight #11
- Wendigo in Incredible Hulk #162
- Werewolf by Night in Marvel Spotlight #2
- Whirlwind (as Human Top) in Tales to Astonish #50
- Whizzer
- I: Robert Frank in USA Comics #1, August 1941
- II: Jame Sanders in The Avengers #69, October 1969
- III: Stanley Stewart in The Avengers #85, March 1971
- White Queen (Emma Frost) in Uncanny X-Men #129
- Wild Thing in Wild Thing #1
- Willie Lumpkin in Fantastic Four #11
- Wizard in Strange Tales #102
- Wolfsbane in New Mutants Graphic Novel
- Wolverine in Incredible Hulk #181
- Wonder Man in Avengers #9
- Wong in Strange Tales #110 (named in Strange Tales #127)
- Wraith
- I: in Marvel Team-Up #48
- II: in Wolverine (vol. 2) #48
- Wrecker in Thor #148
- Wundagore
- I: in Thor #134
- II: in Tales to Astonish #94
Read more about this topic: List Of First Appearances In Marvel Comics Publications