| 4 | 100 Bullets | 1st Appearance of Augustus Medici; 1st Appearance of Megan Dietrich |
| 25 | 100 Bullets | 1st Appearance of Javier Vasco; 1st Appearance of Helena Kotias; 1st Appearance of Anwar Madrid; 1st Appearance of Fulvio Carlito; 1st Appearance of Axel Nagel; 1st Appearance of Sigmar Rhone; 1st Appearance of Joan D’Arcy |
| 70 | 100 Bullets | 1st Appearance of Lars Nagel; 1st Appearance of Anna Nagel; 1st Appearance of Remi Rome |
| 1 | A. Bizarro | 1st Appearance of A. Bizarro (Al Bizarro) |
| 1/NS | A. Bizarro | 1st Appearance of A. Bizarro (Al Bizarro) |
| 1 | Absolute Zero | 1st Appearance of Athena; B&W |
| 0 | Ace of Diamonds | Reprints Heroic Tales #3 and 5; 1st appearance of Ace of Diamonds (Danika Nolan); 1st appearance of Leon Devry; Collects material from Heroic Tales #3 & 5 |
| 27 | Action Comics | 1st Appearance of Adventurers’ Club |
| 52 | Action Comics | 1st appearance of Americommando (Tex Thompson) |
| 348 | Action Comics | 1st Appearance of Acid Master (Philip Henry Master); Origin of Acid Master (Philip Henry Master); Versus Acid Master (Phillip Henry Master) |
| 670 | Action Comics | [s]1991-34; 1st appearance of Atomic Skull; 1st Appearance of Lex Luthor II; Armageddon |
| 670/NS | Action Comics | [s]1991-34; 1st appearance of Atomic Skull; 1st Appearance of Lex Luthor II; Armageddon |
| 687 | Action Comics | [s]1993-12; 1st Appearance of alien Superman; 1st appearance of Last Son of Krypton; Includes poster; Reign of the Supermen |
| 687/NS | Action Comics | [s]1993-12; 1st Appearance of alien Superman; 1st appearance of Last Son of Krypton; Includes poster; Reign of the Supermen |
| 841 | Action Comics | 1st appearance of Auctioneer |
| 841/NS | Action Comics | 1st appearance of Auctioneer |
| 3 | Adam Strange | 1st Appearance of Aleea Strange; Death of Alanna Strange |
| 3/NS | Adam Strange | 1st Appearance of Aleea Strange; Death of Alanna Strange |
| 1 | Adam Strange Archives, The | Reprints Mystery In Space #53-65; Reprints Showcase #17-19; 1st appearance of Adam Strange; 1st appearance of Alanna; 1st appearance of Sardath; Foreword by Jim Amash; 224 pages; ca. 2004 |
| 1-2 | Adam Strange Archives, The | Reprints Mystery In Space #53-65 and Showcase #17-19; 1st Appearance of Adam Strange; 1st Appearance of Alanna; 1st Appearance of Sardath; Foreword by Jim Amash; ca. 2004 |
| 250 | Adventure Comics | 1st Appearance of Arsenal; Aquaman story; Green Arrow and Speedy story; Palisades Park admission ticket and ride coupons; Superboy story |
| 266 | Adventure Comics | 1st appearance of Aquagirl (Lisa Morel) |
| 269 | Adventure Comics | 1st Appearance of Aqualad |
| 270 | Adventure Comics | 1st Appearance of Aquaman’s Aqua-Cave; 2nd Appearance of Aqualad (Garth); Origin of Congorilla |
| 412 | Adventure Comics | Reprints Strange Adventures #180; 1st appearance of Animal Man |
| 1 | Adventure Man (Sparkle Comics) | 1st Appearance of Adventure Man; 1st Appearance of Tormentor; Versus Tormentor; ca. 2017 |
| 1 | Adventurers, The (Book 1) | 1st Appearance of Argent (sorcerer); 1st appearance of Bladehelm; 1st appearance of Coron; 1st appearance of Dhakab; 1st appearance of Nightwind; 1st appearance of Shadolok; 1st appearance of Sultar; 1st appearance of Tirian; Death of Tirian |
| 1-2 | Adventurers, The (Book 1) | Reprints Adventurers (Aircel) #1; 1st appearance of Argent (sorcerer); 1st appearance Bladehelm; 1st appearance Coron; 1st appearance Dhakab; 1st appearance of Shadolok; 1st appearance Sultar; 1st appearance Nightwind; 1st appearance Tirian; Published by Adventure; Death Tirian |
| 429 | Adventures of Superman | 1st Appearance of Adam Grant |
| 429/NS | Adventures of Superman | 1st Appearance of Adam Grant |
| 483 | Adventures of Superman | [s]1991-33; 1st appearance of Atomic Skull; Continued in Action Comics #672 |
| 483/NS | Adventures of Superman | [s]1991-33; 1st appearance of Atomic Skull; Continued in Action Comics #672 |
| 539 | Adventures of Superman | [s]1996-39; 1st Appearance of Anomaly; Origin of Anomaly |
| 539-2 | Adventures of Superman | [s]1996-39; 1st Appearance of Anomaly; Origin of Anomaly; DC Universe logo in UPC box |
| 539/NS | Adventures of Superman | [s]1996-39; 1st Appearance of Anomaly; Origin of Anomaly |
| 579 | Adventures of Superman | [s]2000-23; 1st Appearance of Adversary |
| 579/NS | Adventures of Superman | [s]2000-23; 1st Appearance of Adversary |
| 429 | Adventures of Superman (Canadian Edition) | 1st Appearance of Adam Grant |
| 1 | A-Force | 1st appearance of A-Force; 1st appearance of Singularity; 1st appearance of the Sub-Mariners; Secret Wars tie-in |
| 10 | Age of Ultron | 1st Appearance of Angela in the Marvel Universe; Polybagged |
| 2 | Age of X-Man: The Amazing Nightcrawler | 1st Appearance of Apate; Age of X-Man tie-in |
| 2/A | Age of X-Man: The Amazing Nightcrawler | 1st Appearance of Apate |
| 1 | Airboy | 1st Appearance of Airboy (Davy Nelson); Death of Airboy (David Nelson); Origin of Airboy (Davy Nelson) |
| 2 | Air Fighters Comics | Vol. 1 #2; 1st appearance of Airboy (David Nelson); 1st appearance of Sky Wolf (Larry Wolfe); 1st appearance of Iron Ace (Ronald Britain); 1st appearance of Black Angel (Sylvia Manners); 1st appearance of Bald Eagle (Jack Gatling); 1st appearance of Airboy; 1st appearance of Half-Man (Colonel Von Tundra); Versus Half-Man (Colonel Von Tundra); 1st apperarance of Flying Dutchman (Jan) |
| 1 | Alf | 1st Appearance of Alf |
| 1/NS | Alf | 1st Appearance of Alf |
| 1-3 | Aliens vs. Avengers | 1st Appearance of Ahura Boltagon (Earth-TRN1414); 1st Appearance of Apocalypse (En Sabah Nur - Earth-TRN1414); 1st Appearance of Black Bolt (Blackagar Boltagon - Earth-TRN1414); 1st Appearance of Black Panther (Azari - Earth-TRN1414); 1st Appearance of Black Panther (T’Challa - Earth-TRN1414); 1st Appearance of Captain Marvel (Carol Danvers - Earth-TRN1414); 1st Appearance of Hatut Zeraze (Earth-TRN1414); 1ST Appearance of Hulk (Robert“Bruce”Banner - Earth-TRN1414); 1st Appearance of Lockjaw (Earth-TRN1414); 1st Appearance of Peter Wayland; 1st Appearance of Spider-Man (Miles Morales - Earth-TRN1414); 1st Appearance of Triton; 1st Appearance of Valeria Richards (Earth-TRN1414); 1st Appearance of Venom (Symbiote - Earth-TRN1414); 1st Appearance of Weyland Corporation; 1st Appearance of Xenomorphs XX121 (Aliens) |
| 19 | All-American Comics | 1st Appearance of Atom (Al Pratt); Origin of Atom (Al Pratt) |
| 1 | Allegra | 1st Appearance of Allegra |
| 3 | All-New Hawkeye (2nd Series) | 1st appearance of America Chavez (as Captain America as possible outcome decades into the future) |
| 18 | All-New X-Factor | 1st Appearance of Ammit (Elena Huff) |
| Ash 1 | Alloy | 1st appearance of Alloy |
| Ash 1/A | Alloy | 1st appearance of Alloy |
| 44 | All Star Adventure Comic | Reprints 1st Appearance of Animal Man (in costume) |
| 58 | All Star Adventure Comic | Reprints the 1st appearance of Adam Strange |
| 23 | All-Star Squadron | 1st Appearance of Amazing Man; Origin of Amazing-Man; Origin of Dr. Fate; Gardner Fox L.O.C. |
| 23/NS | All-Star Squadron | 1st Appearance of Amazing Man; Origin of Amazing-Man; Origin of Dr. Fate; Gardner Fox L.O.C. |
| 59 | All-Star Squadron | 1st appearance of Aquaman in All-Star Squadron |
| 59/NS | All-Star Squadron | 1st appearance of Aquaman in All-Star Squadron |
| 23 | All-Star Squadron (Canadian Edition) | 1st Appearance of Amazing Man; Origin of Amazing-Man; Origin of Dr. Fate; Gardner Fox L.O.C. |
| 1 | Ally | 1st Appearance of Ally; Origin of Ally; Fall 1995; B&W |
| 3 | Alpha Flight (4th Series) | 1st Appearance of Alpha Strike; Fear Itself tie-in |
| 3/NS | Alpha Flight (4th Series) | 1st Appearance of Alpha Strike; Fear Itself tie-in |
| 1 | Alter Ego | 1st Appearance of Alter Ego |
| 5 | Amazing Adventures (3rd Series) | 1st Appearance of Astrologer; Paul Levitz L.O.C. |
| 5 | Amazing Adventures (UK Edition) | 1st Appearance of Astrologer; Paul Levitz L.O.C. |
| 15 | Amazing Fantasy | 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Aunt May; 1st appearance of Uncle Ben; 1st appearance of Flash Thompson; Death of Uncle Ben; Origin of Spider-Man |
| 15-2 | Amazing Fantasy | 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Aunt May; 1st appearance of Uncle Ben; Death of Uncle Ben; Origin of Spider-Man; Spider-Man Classics |
| 15-3 | Amazing Fantasy | 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Aunt May; 1st appearance of Uncle Ben; Death of Uncle Ben; Origin of Spider-Man; Reprint packaged with Spider-Man movie DVD |
| 15-4 | Amazing Fantasy | 1st Appearance of Spider-Man (Peter Parker); 1st Appearance of Peter Parker; 1st Appearance of Aunt May Parker; 1st Appearance of May Parker; 1st Appearance of Uncle Ben Parker; 1st Appearance of Ben Parker; 1st Appearance of Flash Thompson; Death of Ben Parker; Origin of Spider-Man (Peter Parker); Marvel Legends 1st Appearance Spider-Man action figure insert |
| 15-6 | Amazing Fantasy | Reprints Amazing Fantasy #15; Reprints Amazing Spider-Man #1; 1st appearance of Ben Parker; 1st appearance of Aunt May Parker; 1st appearance of May Parker; 1st appearance of Crusher Hogan; 1st appearance of Chameleon; 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Uncle Ben Parker; Death of Uncle Ben Parker; Origin of Spider-Man; Packaged with the Spider-Man Origins 1st appearance Spider-Man action figure; “Not for Resale” Giveaway; Contains new ads |
| 15-8 | Amazing Fantasy | Reprints Amazing Fantasy #15 (edited); 1st appearance of Ben Parker; 1st appearance of Aunt May Parker; 1st appearance of May Parker; 1st appearance of Crusher Hogan; 1st appearance of Chameleon; 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Uncle Ben Parker; Death of Uncle Ben Parker; Origin of Spider-Man; Packaged with Marvel Authentics Die-Cast Car Series I; Mini-comic Giveaway |
| 15-9 | Amazing Fantasy | 1st appearance of Spider-Man; 1st appearance of Peter Parker; 1st appearance of Aunt May; 1st appearance of Uncle Ben; 1st appearance of Flash Thompson; 1st Appearance of Spider-Man (Peter Parker); 1st Appearance of May Parker; 1st Appearance of Ben Parker; 1st Appearance of Aunt May Parker; 1st Appearance of Uncle Ben Parker; 1st Appearance of Peter Parker; 1st Appearance of Flash Thompson; Death of Ben Parker; Death of Uncle Ben; Origin of Spider-Man (Peter Parker); Origin of Spider-Man; Old Navy reprint free with shirt purchase |
| 1 | Amazing Fantasy (2nd Series) | 1st Appearance of Arana (Anya Corazon); Arana |
| 1/NS | Amazing Fantasy (2nd Series) | 1st Appearance of Arana (Anya Corazon); Arana |