Dudeism - based on principles espoused by the character of "The Dude" in the Coen Brothers' 1998 film "The Big Lebowski."
E
Earthseed – Parable of the Sower and its sequel, Parable of the Talents, see Octavia Butler
Enigma Babylon One World Faith – Left Behind series
Esoteric Order of Dagon – Cthulhu Mythos
F
Foundationism – Babylon 5
Fordism – Brave New World
J
Jashin - Naruto
Jedi – Star Wars
K
Khala – StarCraft
Kinda – Doctor Who
Klingon religion – Star Trek
Los Illuminados – Resident Evil 4
M
Mercerism – Do Androids Dream of Electric Sheep?
Meyerism – The Path
Movementarianism – The Simpsons
N
The Necromonger Way – The Chronicles of Riddick
Nugganism – Terry Pratchett's Discworld
O
Omnianism – Terry Pratchett's Discworld
Order of Wen the Eternally Surprised – Discworld
Origin – The religion of the Ori race in the television series Stargate SG-1.
R
Rao (comics) worship – Superman mythos. Rao refers to the red sun that Krypton orbited before its destruction, and a related sun god deity. However, in Super Friends #47 (August 1981), Superman states that "Rao" is simply the Kryptonian word for God
Robotology – Futurama (Religion in Futurama)
S
the Silence – Doctor Who religious order who infiltrate the minds of their enemies
Sith – Star Wars
Snakedance – Doctor Who
Super Adventure Club – Cult that is parody Scientology from South Park