The Lethal Legion is a team of fictional characters that appear in comic books published by Marvel Comics.

The first version of the Legion appears in The Avengers #78 (Jul. 1970); the second version in Avengers #164 (Oct. 1977); the third version in West Coast Avengers vol. 2, #1 (Oct. 1985); the fourth version in Avengers West Coast #98 (Sep. 1993), and the final version in the limited series Dark Reign: Lethal Legion #1 (Aug. 2009). The teams were created by Roy Thomas and John Buscema; Jim Shooter and various artists; Steve Englehart and Al Milgrom; Roy Thomas and Tim Dzon; and Frank Tieri and various artists respectively.

Grim Reaper's Lethal Legion Avengers #78–79 (Jul.–Aug. 1970)

Grim Reaper: Madman with a hand replaced by a scythe that harbours powerful technology. Living Laser: An inventor of highly advanced lasers. Man-Ape: One of Wakanda's greatest warriors who performed a forbidden ritual that gave him superhuman strength. Power Man (Erik Josten): Gained superhuman strength and durability due to an ionic ray. Swordsman (Jacques Duquesne): A master swordsman with different weapons in his sword.

Count Nefaria's Lethal Legion Avengers #164–166 (Oct.–Dec. 1977)

Count Nefaria: A crime lord and one of the world's wealthiest men. Living Laser Power Man (Erik Josten) Whirlwind: A mutant who can rotate his body at superhuman speed.

Grim Reaper's second Lethal Legion West Coast Avengers vol. 2, #1–2 (Oct.–Nov. 1985)

Grim Reaper Black Talon: A voodoo sorcerer who can create and control zombies. Goliath (Erik Josten): A man who can grow up to 60 ft. Man-Ape Nekra: A death-spirit. Ultron: A powerful and intelligent robot.

Porcupine's Lethal Legion Marvel Age Annual #1 (1985)

Attuma: An Atlantean barbarian. Batroc the Leaper: A skilled French combatant. Beetle: An engineer who invented a battle suit that enables flight and has other functions. Black Tiger Kurr'fri: A member of the Saurians that Ms. Marvel had encountered. Gorilla-Man Piledriver Porcupine: A criminal with a battle suit based on a porcupine. Sabretooth: A beast-like mutant. Thundra: A super-strong woman. Trapster: A criminal skilled with adhesives. Unicorn Whirlwind Wrecker: A criminal with an enchanted crowbar giving him superhuman strength.

Satannish's Lethal Legion Avengers West Coast #98–100 (Sep.–Nov. 1993)

Hangman (Jason Roland) Axe of Violence: A demonically-enhanced Lizzie Borden with an axe replacing one hand. Coldsteel: A demonically-enhanced Josef Stalin, now an 8 ft. giant with superhuman strength. Cyana: A demonically-enhanced Lucrezia Borgia with poisoned claws. Zyklon: A demonically-enhanced Heinrich Himmler who can belch deadly gas fumes from his mouth.

Grim Reaper's third Lethal Legion Dark Reign: Lethal Legion #1–3 (June–Aug. 2009)

Grim Reaper Nekra Absorbing Man: A thug who was given a potion enabling him to absorb the properties of whatever he touched. Grey Gargoyle: A French chemist who can turn people to stone for an hour by touching them. Tiger Shark: A criminal with the DNA of a shark. Mister Hyde: A scientist who developed a formula that gives him superhuman strength. Wonder Man: Given superhuman strength and durability by an ionic ray.

Grandmaster's Lethal Legion Avengers #676 (Jan. 2018)

Blood Brothers: Two Roclites. Captain Glory: A Kree who was a captain in the Kree Armada. Drall: An Endrionic gladiator. Mentacle: A Rigellian with four tentacles for legs who has psychic abilities. Metal Master: An Astran who admired the works of his predecessor. The Other: An unspecified alien.

Count Nefaria's second Lethal Legion Amazing Spider-Man Vol. 5 #41 (March 2020)

Count Nefaria: Leader Grey Gargoyle Living Laser Whirlwind

Hank Pym's Lethal Legion Avengers Inc. #4-5 (December 2023-February 2024)

Hank Pym: Leader Black Ant: A Life Model Decoy of Eric O'Grady. Ultron-12: He possessed the "Victor Shade" persona that was implanted into Whirlwind's body. Blizzard (Donnie Gill): A NuHuman with a suit that emit a freeze ray. Bullet: A covert agent of the United States government and mercenary. Cobra (Piet Voorhees): The nephew of King Cobra who has the same powers as him. Lodestone: A magnetic supervillain. Mortar: A former member of the Bastards of Evil with a liquid-stone body who is the alleged daughter of Grey Gargoyle. Oddball (Orville Bock): A supervillain with enhanced juggling and street-fighting skills. Piecemeal (Cyborg version): A cyborg created by scientists working for Red Skull. Speed Demon: A former Squadron Sinister member with super-speed. Sunstroke: A supervillain with solar-energy absorption. Supercharger: A supervillain who can absorb, store, and release great amounts of electrical energy.

Other media The Super Hero Squad Show version The following are members of the Lethal Legion in The Super Hero Squad Show and its related media:

Doctor Doom (leader) Abomination Absorbing Man AIM agents Baron Mordo Batroc the Leaper Blob Crimson Dynamo Doctor Octopus Doombots Dormammu Egghead Enchantress Fin Fang Foom Grogg Groot Impossible Man Juggernaut Klaw Loki Magneto Manoo Megataur Melter MODOK Mole Man Molecule Man Moloids Mystique Plantman Pyro Quasimodo Red Skull Ringmaster Sabertooth Screaming Mimi Sentinels Stilt-Man Super-Skrull Skurge Tiger Shark Titanium Man Toad Trapster Tricephalous Volcana Whiplash Whirlwind Wrecking Crew Bulldozer Piledriver Thunderball The Wrecker X the Unknowable Ymir Zzzax