U.S./Canadian Comics

Clockwise from top-left: The DCU, Archie Comics, Scott Pilgrim, Nelvana of the Northern Lights

It should come as no surprise that a whole lot of comics are American. Also included here are Canadian comics, as they are for the most part pretty similar to their southern counterparts due to the large amount of intermingling between the two cultures, businesses and talents, and often see distribution in both regions regardless of origin.

Companies prolific enough to have their own pages:

12-Gauge

Sherwood, Texas

Aardvark-Vanaheim

Abrams ComicArts

Abstract Studio

AC Comics

Femforce

ACC Studios

Liberality for All

Ace Comics (1940-1956)

Ace McCoy
All Love
All Romances
Andy Comics
Atomic War
Baffling Mysteries
Banner Comics
Beyond
Buckskin: America's Defender of Liberty
The Black Spider
Captain Courageous Comics
Captain Victory
Challenge of the Unknown
Complete Love Magazine
Crime Must Pay The Penalty
Dotty
Ernie Comics
Four Favorites
Four Teeners
Fun Time
Glamorous Romances
The Hand of Fate
Hap Hazard Comics
Heroes of the Wild Frontier
Indian Braves
Lightning Comics
The Lone Warrior
Love At First Sight
Love Experiences
Magno The Magnetic Man
Men Against Crime
Monkeyshines Comics
Mr. Risk
Our Flag Comics
Penalty!
Real-Life Secrets
Real Love
Real Secrets
Revealing Romances
Science Comics
Scream Comics
Space Action
Super-Mystery Comics
Sure Fire Comics
Ten-Story Love
Trapped!
Vicky
War Heroes
Web of Mystery
Western Adventures Comics
Western Love Trails
World War III

Adventure Press

Jimmy Tornado

AfterShock Comics

Ahoy Comics

Aircel Comics

Men in Black

AiT/Planet Lar

Ajax-Farrell Publications (1951-1958)^note

All True Romance
Apache Trail
Battle Report
Billy Bunny
Black Cobra
Brenda Starr
Bride's Diary
Bride's Secrets
Bruce Gentry
Bughouse
Captain Flight Comics
Captain Jet
Daffy Tunes Comics
Dark Shadows
Dear Heart
Eva the Imp
Fantastic
Fantastic Fears
The Fighting Man
The Flame
Frisky Animals on Parade
Frontier Trail
Full of Fun
Funny Fables
G-I in Battle
Great Exploits
Gunsmoke Trail
Happy Jack
Haunted Thrills
High Adventure
Hi-Ho Comics
Kiddie Kapers
Linda
Lone Eagle
Lone Rider
Lonely Heart
Madhouse
Men In Action
Midnight
Mighty Bear
Mighty Ghost
My Personal Problem (1955-1957)
Oklahoma Kid
Phantom Lady
The Rider
Rocketman
Samson
Secret Love
Spunky the Smiling Spook
Strange
Strange Fantasy
Strange Journey
Super Cat
Super Spook
Sweetie Pie
Swift Arrow
Swift Arrow's Gunfighters
Terrific Comics/Wonder Boy
Today's Brides
True Life Romances
Vooda
Voodoo
War Report
War Stories
Wild Western Roundup

Albatross Exploding Funny Books

American Comics Group/ ACG (1943-1967)

Adventures into the Unknown
Blazing West
The Clutching Hand
Commander Battle and the Atomic Sub
Dizzy Dames
Forbidden Worlds
Funnybone
Funny Films
Giggle Comics
- Superkatt
Ha Ha Comics
Herbie
Hi-Jinx
The Hooded Horseman
The Kilroys
Lovelorn / Confessions of the Lovelorn
Milt Gross Funnies
Moon Mullins
Operation Peril
Out of the Night
Romantic Adventures
Search For Love
Skeleton Hand
Soldiers of Fortune
Spencer Spook
Spy and Counterspy
Spy-Hunters
Teepee Tim
Young Heroes

Amulet Books

Ape Entertainment

Arcana Studio

Ardden Entertainment

Casper and the Spectrals

Aspen MLT

Aviation Press

Phantom Flyer

Avon Publications

Robotmen of the Lost Planet
Avon Periodicals

Big Dog Ink

Critter

Black Bull Entertainment

Just a Pilgrim

Black Mask Studios

Boy Scouts of America

Norby

Broadsword Comics

Tarot: Witch of the Black Rose
School Bites (now a webcomic)

Broadway Books

The Cartoon History of the Universe

Caliber Comics

Centaur Publishing

Comico

Comics Interview

Southern Knights

Comix Tribe

Continuity Comics

Bucky O'Hare and the Toad Wars!

Covenant Comics

Burlap

Dark Circle Comics (an imprint of Archie Comics formerly known as Red Circle Comics)

Department of the Army

PS Magazine

Del Rey Books (an imprint of Random House)

Odd Thomas

Desperado Publishing

Necessary Evil

Devil's Due Publishing

Different Mousetrap Press

Disney

Dork Storm Press

Drawn and Quarterly

Dreamwave Productions

Eastern Color Printing Company (1933-1955)

Famous Funnies: The series that is generally considered to be the first true comic book. It mainly published reprints of newspaper comics, but it eventually added original material. It also had a oneshot precursor called "Famous Funnies - A Carnival Of Comics".
Big Chief Wahoo
Buck Rogers
Buster Crabbe
Century of Comics
Club "16"
Dickie Dare
Mickey Finn
Movie Love
Personal Love
Daisy Comics
Heroic Comics
Jingle Jangle Comics
Juke Box Comics
New Heroic Comics
Reg'lar Fellers Heroic Comics
Steve Roper
Sugar Bowl Comics
Tales From The Great Book

Eclipse Comics

Adolescent Radioactive Black Belt Hamsters
Destroyer Duck
The DNAgents
The Heap
Ms. Tree
Tales of the Beanworld (published by Dark Horse Comics after its revival)
Zot!

Elliot Publications

Kismet: Man of Fate

Eros Comix

Event Comics

Painkiller Jane

Evil Twin Comics

Action Philosophers!

Evil Scum Comics

Duster (2015)

Fantagraphics

Fiction House

First Comics

Fishwrap Productions

Fox Feature Syndicate

Graphic Universe

My Boyfriend Is a Monster

Hannagram

Once Upon a Caper

HarperCollins

Anne: An Adaptation (under Quill Tree Books)
Jo: An Adaptation (under Quill Tree Books)
Warrior Cats (originally had volumes published as OEL Manga by Tokyopop; later republished and new editions rebranded as "graphic novels" by HarperCollins)