The Ravencroft Institute for the Criminally Insane, also called the Ravencroft Sanitarium, is an institution for those too dangerous to live among normal society.
Cletus Kasady was later arrested and was also put in Ravencroft.
The head psychologist was Dr. Ashley Kafka and she treated both Eddie Brock and Cletus Kasady.
Dr. Kafka didn't believe Brock's story about being Venom and tried to convince him that it was all in his head.
Baron Mordo later re-bonded Brock to the symbiote turning him into Venom again. Venom then escaped Ravencroft. Mordo also gave Kasady another symbiote which turned him into Carnage. Carnage also escaped Ravencroft.
Brock later decided that he didn't want to be bonded to the symbiote anymore so he kidnapped Dr. Kafka and brought her to Ravencroft. While there Brock asked Dr. Kafka to help him separate from the symbiote.
- Ashley Kafka: Psychologist
In the comics
The Ravencroft Institute for the Criminally Insane was founded by Dr. Ashley Kafka.
The supervillain, Vermin, was Dr. Kafka's assistant.
When Dr. Kafka's success rate was brought into question she was replaced by Dr. Leonard Sampson. However, Dr. Sampson ended up leaving Ravencroft.
J. Jonah Jameson's son, John Jameson, use to work at Ravencroft as it's head of security.
Known patients at Ravencroft include Blackhole, Bushman, Carnage, Carrion, Chameleon, D.K., Doctor Octopus, Electro, Foolkiller, Gale, Great Wall, Herman the German, Jackal, Massacre, Mayhem, Mindworm, Morpheus, Mysterio, Nelson Cragg, Prism, Pyromania, Ramon Grant, Razorwire, Shriek, Sir, Vulture, Webber, Wild Whip, and Wolverina.
- In the episode, The Final Nightmare, Dr. Farley Stillwell was shown to be a patient at an unnamed asylum. It is possible this asylum was Ravencroft. However, this is never confirmed in Spider-Man: The Animated Series.
- In the 1995 Spider-Man video game, the Norman Osborn version of Green Goblin, Doctor Octopus, Alistair Smythe, Jack O'Lantern, and the Alien Spider Slayer were inmates at Ravencroft.