- Ice Ape
- Ice Cream Clown Man
- Ice Cream Man (Sweet Revenge)
- Ice Demons
- If you aren’t scared, you don’t know Jack
- Igor
- Ima Wiggles
- Immolated Victims
- Immortal Island
- Impatient Warden
- In Your Eyes Woman
- Incredible Hulk Coaster
- Incubus (Halloween Horror Nights 13)
- Incubus (The Fallen)
- Indian
- Indiana Jones
- Inez Reyes
- Infantata
- Inferno
- Inferno Girl
- Infestation
- Infinite Fear
- Influencers
- Injured/Dead Rangers
- Injured Kid
- Ink Blots
- Inner Sanctum
- Insane
- Insane Macey
- Insanity
- Inside the Mind
- Insidious: Beyond the Further
- Insidious: Into the Further
- Insidious: Return to the Further
- Insidious: The Last Key
- Insidious (Franchise)
- Insidious (Haunted House)
- Instig8or
- International Food Bazaar
- Internet Troll
- Interstellar Terror
- Interview with the Director
- Invasion!
- Invisible Man
- Io
- Ioticle
- Iris
- Iron Belly
- Iron Bone Gorge
- Iron Man Stiltwalker
- Ishmael Polk
- Island Under Siege
- Island of Evil Souls
- It's A Wicked Good Time For Universal's `Undead'
- It's a bloody, scary, Mary Halloween
- Ito Oume
- It’s back! Halloween Horror Nights returns to terrorize
- It’s the unkindest cut of all
- Ivy
- J-Horror
- J. Michael Roddy
- JAWS
- JAWS Queue
- JP Extinction
- Jabbawockeez
- Jack
- Jack'd Up Experience
- Jack's 3-Dementia
- Jack's Blender
- Jack's Captives
- Jack's Carnival of Carnage
- Jack's Funhouse in Clown-O-Vision
- Jack's Maniac
- Jack's Maniacs (Clowns)
- Jack's Maniacs (Prisoners)
- Jack's Maniacs (Rednecks)
- Jack's Nightmare Circus
- Jack's Recurring Nightmare Circus
- Jack (American Werewolf in London)
- Jack Bauer
- Jack Frost
- Jack O' Lantern
- Jack Presents: 25 Years of Monsters & Mayhem
- Jack Sparrow
- Jack Sprat
- Jack Torrance
- Jack be Nimble (Wee Willie Winkie)
- Jack the Clown
- Jack the Clown Minions
- Jack the Ripper
- Jack “The Clown” Schmidt The First Original Halloween Horror Nights Icon
- Jacked Up
- Jacks pack is the sum of our fears
- Jacksonville
- Jaguar Creature
- James Franco
- James Franco's House
- James March
- James Westhorne
- Jamie Lloyd
- Janet
- Janine Melnitz
- Janitor
- Janitor El Cucuy
- Japanese Schoolgirl
- Jason's Bloody Diner
- Jason Carver
- Jason Segel
- Jason Voorhees
- Jason’s Shrine Room
- Jawbone Girl
- Jay Baruchel
- Jed Potter
- Jeff
- Jeff Denlon
- Jeff Ridenhour
- Jeffrey Dietze
- Jem
- Jeremiah
- Jeremy
- Jerrica Benton
- Jerry
- Jerry Goldsmith
- Jerry Springer
- Jersey Devil
- Jersey T-Shirt Zombie
- Jessica Felton
- Jessie the Dancing Clown Girl
- Jester (Toyz)
- Jester Clown
- Jester Doll
- Jester Inmate
- Jester Zombie
- Jether Polk
- Jigsaw
- Jigsaw Johnny
- Jill
- Jill Tuck
- Jill Valentine
- Jillian Holtzmann
- Jim Hopper
- Jim Udenberg
- Jimmy Neutron's Nicktoon Blast
- Jing
- Jing's Revenge
- Joan
- Joe the Clown
- Joel Miller
- Jogging Zombie
- John
- John Deedle
- John Kramer
- John Michaels
- John Murdy
- John Reynolds
- John Travolta
- Jojo's Ice Cream
- Jojo's Ice Cream Truck
- Jolene the Clown Girl
- Jolly Ghost
- Jonah Hill
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