The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Ideologies (7 members)
- Imperialism (3 members)
- Imperialist historians (1 member)
- Imperialist propaganda (1 member)
- Imperialists (2 members)
- InfraHaz streams (1 member)
- InfraWiki (1 member)
- Infrared Collective (2 members)
- Infrared Operations (1 member)
- Infrared memes (2 members)
- Infrared showrunners (1 member)
- Intelligence agencies (2 members)
- Intelligence front groups (1 member)
- International organizations (1 member)
- Journalists (9 members)
- Killed journalists (2 members)
- Lacanian School (1 member)
- Lacanianism (1 member)
- Leaders (1 member)
- Leaders by nationality (1 member)
- Leftists (1 member)
- Libertarianism (2 members)
- Library (2 members)
- Library works by Alexandra Kollontai (1 member)
- Library works by Frederick Engels (1 member)
- Library works by Huey Long (1 member)
- Library works by Joseph Stalin (1 member)
- Library works by Karl Marx (1 member)
- Library works by Mao Zedong (2 members)
- Library works by author (6 members)
- List of videos (1 member)
- Lists (1 member)
- Literacy (1 member)
- Logos (1 member)
- Lyndon LaRouche (4 members)
- Lysenkoism (1 member)
- MAGA (3 members)
- Main (1 member)
- Main Pages (1 member)
- Maintenance pages (7 members)
- Mao Zedong (1 member)
- Maoism (1 member)
- Marxism (4 members)
- Marxism-Leninism (2 members)
- Marxist-Leninists (1 member)
- Marxists (1 member)
- Media (1 member)
- Media analysis (0 members)
- Media outlets (4 members)
- Memes (7 members)