1991 in comics

Year overall

 * Publishers Cartoon Books, Comic Zone Productions, Personality Comics, and Boneyard Press all enter the arena; First Comics stops publishing.

January

 * Checkmate is canceled by DC Comics with issue #33.
 * El Diablo vol. 2 is canceled by DC with issue #16.
 * Count Duckula is canceled by the Marvel Comics imprint Star Comics with issue #15.
 * Alien Legion: On The Edge is canceled with issue #3.
 * Avengers Spotlight is cancelled with #40.

February

 * The Amazing Spider-Man #344 - First appearance of Cletus Kasady, who later becomes the super-villain Carnage.
 * New Mutants #98 - Introduction of Deadpool, Domino, and Gideon. (Marvel Comics)
 * Power Pack is canceled by Marvel with issue #62.
 * Heathcliff is cancelled with issue #56.

March

 * Weapon X begins in Marvel Comics Presents.
 * With #12, Stalkers is cancelled by Epic Comics.
 * With #4, The Last American is cancelled by Epic Comics.

April

 * New Mutants #100, the title's final issue, featuring the debut of X-Force (Marvel Comics).
 * April 4: Graham Ingels dies at age 75.
 * With #6 Cadillacs & Dinosaurs is cancelled.
 * With #5, Hollwood Superstars is cancelled.
 * First issue of Seth's Palookaville

May

 * W. B. Park receives the National Cartoonist Society Advertising and Illustration Award.

June

 * Armageddon 2001 crossover event.

July

 * Superman: The Man of Steel #1 - debut issue of fourth ongoing Superman title. Written by Louise Simonson and drawn by Jon Bogdanove, Tom Grummett, Bob McLeod, Dan Jurgens, Dennis Janke, Jerry Ordway, and Brett Breeding.
 * Wizard publishes its premiere issue.
 * Muir Island Saga begins.
 * With #10, Mighty Mouse is cancelled.
 * With #80, The Transformers is cancelled by Marvel Comics.
 * With #25, Yummy Fur moves to Drawn and Quarterly

August

 * New Gods vol. 3 is canceled by DC with issue #28.
 * With #19, Cloak & Dagger is cancelled.
 * August 18: Underground comics artist Rick Griffin dies at age 47.

September

 * Alpha Flight #100: "The Final Option, Part Four: Decisions of Trust," written by Fabian Nicieza.
 * With #2, Impossible Man Summer Vacation Spectacular is cancelled.
 * With #4, Car Warriors is cancelled.
 * With #3, Samurai Cat is cancelled.
 * With #4, Damage Control v3 is cancelled.
 * Everything's Archie is canceled by Archie Comics with issue #157.
 * September 5: Carol Kalish, Vice President of New Product Development at Marvel Comics, dies at age 46.

October

 * Crisis is canceled by Fleetway with issue #63.
 * With #2, Legion of Night is cancelled.
 * With #3, Terminator 2: Judgment Day is cancelled.
 * With #4, Alpha Flight Special is cancelled.
 * With #6, Sweet XVI is cancelled.
 * With #10, Foolkiller v1 is cancelled.

November

 * Alpha Flight #102: Introduction of Wild Child as Weapon Omega.
 * Maze Agency is canceled by Innovation Comics with issue #23.
 * With #12, Marvel Comics' Zorro is cancelled.
 * November 21 – the Marathi comic strip Chintoo is first published

December

 * The Incredible Hulk #388: Jim Wilson revealed to be HIV-positive.
 * December 21: Sheldon Mayer dies at age 74.
 * December 29: Long-time Disney comics artist Tony Strobl dies at age 76.

Conventions

 * Tri-State Con — guests include Michael Avon Oeming, Evan Dorkin, Nat Gertler, Romeo Tanghal, Paul Ryan, Bob Wiacek, and Mike Manley


 * April 27–28: WonderCon (Oakland Convention Center, Oakland, California) — guests include Kevin Eastman, Mark Bodé, Miguel Ferrer, Bill Mumy, Steve Leialoha, and Max Allan Collins
 * June: Heroes Convention (Charlotte, North Carolina)
 * June 21–23: Comix Fair (Holiday Inn-Medical Center, Houston, Texas) — ninth annual convention; guests include Russ Heath, Nestor Redondo, Jeff Millar, Bill Hinds, and Richard Klaw
 * June 28–30: Chicago Comicon (Ramada O'Hare, Rosemont, Illinois) — guests include Jim Steranko, Kevin Eastman, and Chris Claremont
 * July 4–7: San Diego Comic-Con (San Diego Convention Center and Pan Pacific Hotel, San Diego, California): 15,000+ attendees; official guests: Clive Barker, Dan DeCarlo, Harlan Ellison, Neil Gaiman, Keith Giffen, Joe Haldeman, Lynn Johnston, Joe Kubert, Jim Lee, Don Maitz, Sheldon Moldoff, Rick Sternbach, and Janny Wurts
 * July 12–14: Dragon Con//Atlanta Comics Expo (Atlanta Hilton & Towers, Atlanta, Georgia) — 5,200 attendees; guests include Philip José Farmer and Frank Miller
 * July 19–21: Dallas Fantasy Fair (Dallas, Texas)
 * September 21–22: Miamicon (Ft. Lauderdale Design Center Sheraton Hotel, Ft. Lauderdale, Florida; and Miami Marriott, Miami, Florida) — guests include Chris Warner, Evan Dorkin, Bob Schreck, and Matt Wagner
 * November: Mid-Ohio Con (Ohio)

DC Comics

 * Deathstroke the Terminator
 * Superman: The Man of Steel

Limited series

 * Black Canary
 * Release: November.

Dark Horse Comics

 * Star Wars: Dark Empire

Marvel Comics

 * Barbie
 * Release: January


 * Barbie Fashion
 * Release: January.


 * Bill & Ted's Excellent Comic Book
 * Release: December.


 * Captain Planet and the Planeteers
 * Release: October.


 * Darkhawk
 * Release: March.


 * ''Deathlok v2
 * Release: July.


 * The Destroyer v3
 * Release: December.


 * Double Dragon
 * Release: July.


 * Original Ghost Rider Rides Again
 * Release: July.


 * NFL Superpro
 * Release: October.


 * Sleepwalker
 * Release: June.


 * Sweet XVI
 * Release: May.


 * The Toxic Avenger
 * Release: April.


 * Wonder Man
 * Release: September.


 * X-Force v1
 * Release: August.


 * X-Men v2
 * Release: October.

Limited series

 * Adventures of Captain America
 * Release: September.


 * Alpha Flight Special
 * Release: July.


 * Captain Confederacy
 * Release: November by Epic Comics.


 * Car Warriors
 * Release: June by Epic Comics.


 * Damage Control v3
 * Release: June.


 * Deadly Foes of Spider-Man
 * ''Release: May.


 * Deathlok Special (reprint of Deathlok v1)
 * Release: May.


 * The Infinity Gauntlet
 * Release: July.


 * Legion of Night
 * Release: September.


 * The Pirates of Dark Water
 * Release: November.


 * Samurai Cat
 * Release: June by Epic Comics.


 * Spider-Man Saga
 * Release: November.


 * Terminator 2
 * Release: September.


 * The Transmutation of Ike Garuda
 * Release: July by Epic Comics.


 * Weaveworld
 * Release: December by Epic Comics.

DC Comics

 * Abattoir in Detective Comics #625
 * Alexandre LeRoi in Batman: Master of the Future
 * Atomic Skull II in Adventures of Superman #483
 * Bloody Mary in Hawk and Dove vol. 2 #21 (February )
 * Donna Cavanaugh in The Sandman #32 (November )
 * Chantinelle in Hellblazer #43 (July )
 * Destruction of the Endless in The Sandman Special #1 (November )
 * Electrocutioner II in Detective Comics #626 (February )
 * General Glory I in Justice League America # 46 (January )
 * King Snake in Robin #2 (February )
 * Linear Men in Adventures of Superman #476 (March )
 * Lynx II in Robin v1 #1 (January )
 * Mirage II in The New Titans #79
 * Monarch I in Armageddon 2001 #2 (October )
 * Nightrider in New Titans Annual #7
 * Pantha in New Titans #73 (February )
 * Speed Queen in Hawk and Dove vol. 2 #21 (February )
 * Terra II in New Titans #79 (September )
 * Ron Troupe in Adventures of Superman #480 (July )
 * Malice Vundabar in Hawk and Dove vol. 2 #21 (February )
 * Waverider in Armageddon 2001 #1 (May)
 * Paul Westfield in Superman Vol. 2, #58 (August )

Marvel Comics

 * 8-Ball in Sleepwalker #1 (June )
 * Helmut in Incredible Hulk #379 (March )
 * Lucas Bishop in Uncanny X-Men #282 (November )
 * G.W. Bridge in X-Force v1 #1 (August )
 * Copycat in New Mutants #98 (February )
 * Abraham Cornelius in Marvel Comics Presents #73 (March )
 * Fabian Cortez in X-Men vol. 2, #1 (October )
 * Cyber in Marvel Comics Presents #85 (September )
 * Darkhawk in Darkhawk #1 (March )
 * Deadpool in The New Mutants #98 (February )
 * Devos the Devastator in Fantastic Four #359 (December )
 * Marco Delgado in X-Men v. 2, #1 (October )
 * Wyndell Dichinson in Web of Spider-Man #81 (October )
 * Feral in New Mutants vol. 1, #99 (March )
 * Firebrand II in Web of Spider-Man vol. 1, #77 (June )
 * Trevor Fitzroy in Uncanny X-Men #281 (October )
 * Muriel Frost in Doctor Who Magazine #169
 * Gauntlet I in X-Factor v. 1, #65 (April )
 * Gideon in New Mutants (vol. 1) #98 (February )
 * Impala in Captain America #388 (July )
 * Krugarr in Guardians of the Galaxy Annual #1
 * Lodestone in Darkhawk #7 (September )
 * Fabian Marechal-Julbin in New Warriors #9 (March )
 * Nox in Doctor Strange, Sorcerer Supreme #31 (July )
 * Paibok in Fantastic Four Vol. 1, #358 (November )
 * Phobos I in Dr. Strange, Sorcerer Supreme #32 (August )
 * Phoenix (Giraud) in Guardians of the Galaxy #11 (April )
 * Protégé in Guardians of the Galaxy #15 (August )
 * Psynapse in X-Factor #65 (April )
 * Rancor in Guardians of the Galaxy #8 (January )
 * Replica in Guardians of the Galaxy #9 (February )
 * Shatterstar in New Mutants vol. 1, #99 (March )
 * Shinobi Shaw in X-Factor #67 (June )
 * Sleepwalker in Sleepwalker #1
 * Speedfreek in Incredible Hulk #388 (December )
 * Squirrel Girl in Marvel Super-Heroes Special vol. 2, #8 (Winter)
 * Jeremy Stevens in Uncanny X-Men #283 (December )
 * Carl Stricklan in Daredevil Annual #9
 * Talon in Guardians of the Galaxy #18 (November )
 * Tusk in X-Factor #65 (April )
 * Nathan Taylor in Incredible Hulk #379 (December )
 * Weapon X II in X-Force v. 1, #2 (September )
 * Buford Wilson in New Warriors vol. 1, #9 (March )
 * John Wraith in Wolverine (vol. 2) #48 (November )
 * Zodiak in Ghost Rider Vol. 3, #10 (February )

Other publishers

 * Detective-Judge Armitage in Judge Dredd Megazine v.1, #9 (Fleetway, June)
 * Lady Death in Evil Ernie #1 (Chaos! Comics, December )
 * Erica Pierce in Solar, Man of the Atom v. 2, #1 (Valiant Comics, September )