The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- A.I.M. (5 members)
- Administrators (3 members)
- Adults (8 members)
- Anti-villains (2 members)
- Armor (1 member)
- Armor Users (23 members)
- Armors (19 members)
- Article management templates (4 members)
- Article stubs (1 member)
- Artificial Intelligence (1 member)
- Avengers (1 member)
- BlogListingPage (0 members)
- Blog posts (13 members)
- Browse (38 members)
- Buildings (1 member)
- Candidates for deletion (12 members)
- Candidates for speedy deletion (0 members)
- Cartoons (1 member)
- Category templates (4 members)
- Characters (82 members)
- Characters of the cancelled season 3 (0 members)
- Chinese (12 members)
- Comics (1 member)
- Community (5 members)
- Companies (4 members)
- Concepts (2 members)
- Content (1 member)
- Copyright (0 members)
- Countries (2 members)
- Deceased Characters (20 members)
- Disambiguations (0 members)
- Doctor Doom Enemies (0 members)
- Enemies of other heroes (0 members)
- Episodes (54 members)
- Equipment (8 members)
- Extremis Users (1 member)
- Female Characters (5 members)
- Females (12 members)
- Files (2 members)
- Former Villains (6 members)
- Forums (6 members)
- General wiki templates (32 members)
- Geniuses (12 members)
- Guardians (0 members)
- Hammer Multinational (4 members)
- Help (5 members)
- Help desk (2 members)
- Heroes (15 members)
- Hidden categories (2 members)
- Hulk Villains (0 members)
- Image wiki templates (9 members)
- Images (7 members)
- Infobox portals (2 members)
- Infobox templates (11 members)
- Iron Man (1 member)
- Iron Man Alies (0 members)
- Iron Man Armor (17 members)
- Iron Man Enemies (49 members)
- Iron Man Villains (39 members)
- Items (15 members)
- Locations (8 members)
- Main Villains (3 members)
- Makluan Guardians (10 members)
- Makluan Rings (11 members)
- Male Characters (17 members)
- Males (48 members)
- Marvel Animation (1 member)
- Metals (3 members)
- Mutants (4 members)
- Neutral (4 members)
- New pages (0 members)
- Objects (30 members)
- Organisation (0 members)
- Organization (8 members)
- Organizations (12 members)
- Pages proposed for deletion (0 members)
- Pages with broken file links (11 members)
- Places (14 members)
- Policy (2 members)
- Project Pegasus (3 members)
- Robots (7 members)
- Rooney (1 member)
- Russians (3 members)
- S.H.I.E.L.D. (10 members)
- S.H.I.E.L.D. Equipment (1 member)
- S.H.I.E.L.D. personnel (1 member)
- S.H.I.E.L.D. scientists (1 member)
- Schools (1 member)
- Season 1 (3 members)
- Season 1 episodes (11 members)
- Season 2 (1 member)
- Season 2 episodes (14 members)
- Site administration (4 members)
- Site maintenance (4 members)
- Superhero (1 member)
- T (1 member)
- Teachers (1 member)
- Team Iron Man (4 members)
- Teambox templates (1 member)
- Teams (4 members)
- Technology (54 members)
- Teenagers (13 members)
- Template documentation (62 members)
- Templates (12 members)
- The Maggia (5 members)
- The Tong (5 members)
- Theme song (1 member)
- Tomorrow Academy Staff (2 members)
- Tomorrow Academy Students (8 members)
- Videos (3 members)
- Villains (52 members)
- Watercooler (2 members)
- Wealthy People (8 members)
- Weapons (4 members)
- Zombies (3 members)