First version •
Mister Mind (leader) – An alien worm with telepathic powers and a genius intellect. •
Dummy – A living ventriloquist dummy and enemy of
Vigilante. •
Mister Who – A crippled criminal mastermind and early enemy of
Doctor Fate. He created Solution Z, which grants him the abilities of shapeshifting, size-shifting, invisibility, regeneration, and intangibility. •
Nyola – A weather-controlling Aztec priestess who previously fought
Hawkman. •
Oom the Mighty – A magical living statue and early enemy of the
Spectre. •
Ramulus – A supervillain who can manipulate plants and is an early enemy of
Sandman and
Sandy the Golden Boy.
Second version •
Mister Mind (leader) •
Adolf Hitler – He and all the resources of
Nazi Germany have assisted the Monster Society of Evil. Adolf Hitler was the one who gave the orders to create Captain Nazi. •
Archibald – A
satyr and graduate of the Monster School who helped Mister Mind capture Billy Batson. • An army of
termites and
worms. •
Artificial Bodies - Artificial bodies Mister Mind could mentally inhabit and which were used to fool Captain Marvel as he searched for Mind on his asteroid base, •
Goat-Man – A humanoid goat creature who was the first recruit of the Monster Society of Evil. • A seemingly indestructible robot. • A giant purple
octopus with a grinning human face. • A circus
strongman with strength rivaling that of Captain Marvel himself. •
Benito Mussolini – He and all the resources of
Fascist Italy have assisted the Monster Society of Evil. •
Bonzo – A
hunchback human with large eyes and fangs. •
Captain Nazi – A Nazi
super soldier who assisted in the first plot. •
Crocodile-Men – A species of humanoid
crocodiles from the planetoid Punkus. •
Herkimer – A Crocodile-Man who is Mister Mind's second-in-command. He later reforms and begins working in a circus. •
Jorrk – A scientist and one of Mister Mind's lieutenants. •
Sylvester – A Crocodile-Man and one of Mister Mind's preferred gunners. •
Dobbin – Mister Mind's
seahorse steed. •
Dome Attendants – A group of creatures who tend to Mister Mind's undersea base. It consists of: • An unnamed
Pig Man. • An unnamed
Goblin. • An unnamed
Werewolf. • An unnamed
Ogre. • An unnamed
midget submarine captain. The midget was the last of Mister Mind's minions to leave him. •
Dr. Smashi – A short Japanese scientist and one of Mister Mind's three lieutenants, alongside Jorrk and Herr Phoul. •
Dr. Hashi – A spiky-haired Japanese scientist. •
Dr. Peeyu – A tall Japanese scientist. •
Doctor Sivana – The "world's wickedest scientist". •
Evil Eye – A green-skinned humanoid monster with hypnosis. •
Herr Phoul – A bald Nazi scientist with a monocle and one of Mister Mind's three lieutenants alongside Jorkk and Dr. Smashi. •
Hideki Tojo – He and all the resources of
Imperial Japan have assisted the Monster Society of Evil. •
Hydra – A serpentine monster created by Mister Mind. •
Ibac – A criminal who sold his soul to Lucifer for super-strength and durability, which he gets by saying the magic word "Ibac". •
Jeepers – The last of a race of bat monsters. •
Marmaduke – A criminal with big ears and a fat face. •
Monster Brigade – Oceanic monsters under Mister Mind's command consisting of: • A
sperm whale. • A
gigantic octopus. • A
hammerhead shark. • A huge
sea serpent. •
Monster School Professors – Teachers at Mister Mind's Monster School. It consists of: • An unnamed human. • An unnamed Crocodile-Man. • An unspecified fanged monster. • A humanoid with the head of a
hippopotamus. •
Monster School Students – Pupils at the Monster School that consist of: • Unnamed tough humans • Unnamed Crocodile-Men. • A horned black
demon. •
Mr. Banjo – A criminal and leaker of Allied secrets via coded music. •
Nippo – A master of disguise, master swordsman, and spy for the Japanese. •
Synthetic Animals – Fake animals created by Mister Mind. They consisted of •
Oscar - A giant lobster. •
Oliver - A gigantic octopus with human hands. •
Ophelius - A huge ram. •
Oliphant - A dragon. •
Tough Guys – Human enforcers of Mister Mind. • An unnamed Tommy-gun wielder. • An unnamed cloaked swordsman. • An unnamed beret-wearer. • An unnamed stereotypical "Goomba". • A Gatsby cap-wearer.
Third version •
Mister Mind (leader) •
Doctor Sivana •
Ibac •
Georgia Sivana – Sivana's youngest daughter. •
Thaddeus Sivana Jr. – Sivana's youngest son.
Fourth version •
Mister Mind (leader) •
Doctor Sivana •
Ibac •
Black Adam – A traitorous first of the Marvels with powers similar to the others, but from the Egyptian gods. •
King Kull – The last of the Beast-Men who ruled Earth before being overthrown. He has enormous strength and durability and a brilliant mind, along with bizarre technology. •
Mister Atom – An indestructible and super-strong genocidal robot who possesses the power of an atomic bomb. •
Oggar – An immortal sorcerer and former ally of the wizard Shazam. •
The inhabitants of 247 planets – Various alien species who the Society forced to work for them.
Fifth version •
Mister Mind (leader) - A worm from the Wildlands. He is revealed to be controlling C.C. Batson. •
Doctor Sivana - A mad scientist from the Earthlands. •
Crocodile-Men - A three-headed anthropomorphic crocodile from the Wildlands. •
Dummy - A man who was transformed into a living dummy and exiled to the Monsterlands following a fight with the "heroes of yesterday". •
Evil Eye - A tentacled monster from the Monsterlands. •
Jeepers - A bat monster from the Darklands. •
King Kull - The last of the Beast-Men from the Earthlands. •
Mister Atom - A giant robot from the Gamelands. •
Mister Merry-Go-Round - A villain from the Funlands. •
Red Queen - A queen in red from the Wozenderlands. •
Scapegoat - An anthropomorphic goat from the Wildlands. Killed by Superboy-Prime. •
Wicked Witch of the West - A witch from the Wozenderlands.
Sixth version •
Mister Mind (leader) - •
Beautia Sivana - The daughter of Doctor Sivana. •
Dr. Georgia Sivana - The scientific daughter of Doctor Sivana. •
Evil Eye II - A woman with bandages over her eyes that can bring her graffiti art to life. •
Gorilla Ted - A former Gorilla Militia member and astronaut from Gorilla City. •
Herkimer - A Crocodile-Man. •
Jeepers - • '''Jeepers' Race''' - •
King Kull - •
Submen - •
Mister Atom - This version is a series of robots controlled by a man named Charles Langley. •
Sabbac - A demonic manifestation that works for the Seven Deadly Enemies of Man. ==The Secret Code of the Monster Society==