M
- M. Rex
- Machine Teen
- Mad
- Madrox
- Magdalena
- Magician Apprentice
- Magneto
- Majestic
- Man-Bat
- Man-Thing
- Manhunter
- Manifest Eternity
- Martian Manhunter
- Marvel 1602
- Marvel Adventures Fantastic Four
- Marvel Adventures Hulk
- Marvel Adventures Iron Man
- Marvel Adventures Spider-Man
- Marvel Adventures The Avengers
- Marvel Age Fantastic Four
- Marvel Age Spider-Man
- Marvel Boy
- Marvel Knights
- Marvel Knights 4 (Four)
- Marvel Knights Spider-Man
- Marvel Mangaverse
- Marvel Nemesis The Imperfects
- Marvel Spotlight
- Marvel Team-Up
- Marvel The Lost Generation
- Marvel Universe The End
- Marvel Zombies
- Mary Jane
- Masters of the Universe
- Matrix (The)
- Maximo
- Maximum Security
- Mech Destroyer
- Mechanic (The)
- Mega Morphs
- Megacity 909
- Meridian
- Metal Gear Solid
- Micronauts
- Midnight Nation
- Midnighter
- Mighty Avengers
- Missing Kamikakushi No Monogatari
- Monarchy (The)
- Moon Knight
- More Than Mortal
- Morlocks
- Mostly Wanted
- Mouse Guard
- Mr. Majestic
- Ms. Marvel
- Mutant 2099
- Mutant X
- Muties
- Mutopia X
- Mystery In Space
- Mystic
- Mystic Arcana
- Mystique
