The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Television series (24 members)
- Template documentation (23 members)
- Templates (68 members)
- Tie-Ins (25 members)
- Timeline (100 members)
- Titanosaurus (4 members)
- Toy Lines (70 members)
- TriStar series (186 members)
- TriStar series - Characters (13 members)
- TriStar series - Episodes (41 members)
- TriStar series - Films (1 member)
- TriStar series - Games (6 members)
- TriStar series - Godzilla films (0 members)
- TriStar series - Image galleries (5 members)
- TriStar series - Images (691 members)
- TriStar series - Kaiju (49 members)
- TriStar series - Locations (14 members)
- TriStar series - Objects (0 members)
- TriStar series - Organizations (1 member)
- TriStar series - Printed media (2 members)
- TriStar series - Races (1 member)
- TriStar series - Soundtracks (3 members)
- TriStar series - Staff (7 members)
- TriStar series - TV series (1 member)
- TriStar series - Tracks (0 members)
- TriStar series - Unmade films (2 members)
- TriStar series - Unmade kaiju (4 members)
- TriStar series - Vehicles (14 members)
- TriStar series - Video galleries (1 member)
- TriStar series - Weapons (0 members)
- Unsourced quotes (0 members)
- User groups (2 members)
- User images (2,839 members)
- Users (362 members)
- Utility templates (25 members)
- Vehicles (156 members)
- Video galleries (8 members)
- Video games (145 members)
- Video games - Characters (2 members)
- Video games - Images (5 members)
- Video games - Kaiju (34 members)
- Video games - Races (1 member)
- Video games - Unmade kaiju (4 members)
- Video games - Vehicles (1 member)
- Videos (709 members)
- Watercooler (24 members)
- Weapons (37 members)
- Websites (1 member)
- Wiki files (87 members)
- Zone Fighter episodes (6 members)