| |

Abe Brown |

Abe Klein |

Abomination |

Absorbing Man |

Acroyear |
|
| |

Adam Warlock |

Agatha Harkness |

Agnar of Vanaheim |

Ajak |

Aleta |
|
| |

Alex Power |

Alison Double |

Alistaire Stuart |

Amanda Sefton |

Amber Grant |
|
| |

American Eagle |

Amphibian |

Anaconda |

Analyzer |

Ancient One |
|
| |

Andrew Hawk |

Andromeda |

Angar the Screamer |

Angelo Macon |

Ann Reynolds |
|
| |

Anna Kapplebaum |

Anna Watson |

Annihilus |

Ant-Man (Scott Lang) |

Anton Lupeski |
|
| |

Ape-Man |

Apocalypse |

Aquarian |

Aquarius |

Aragorn |
|
| |

Arcade |

Archie Corrigan |

Arcturus Rann |

Ares |

Arishem |
|
| |

Arkon |

Arnie Berman |

Arnie Roth |

Arnim Zola |

Arranger |
|
| |

Arthur Chekov |

Artie Maddicks |

Asp (Cleo Nefertiti) |

Atlas (Erik Josten) |

Attuma |
|
| |

Auric |

Aurora |

Aurora Rabinowitz |

Avalanche |

Awesome Android |
|
| |

Awilda Ayala |
|