The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Aliens (10 members)
- Article management templates (4 members)
- Article stubs (2 members)
- BlogListingPage (0 members)
- Blog posts (1 member)
- Browse (7 members)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Category templates (3 members)
- Characters (18 members)
- Community (6 members)
- Content (1 member)
- Copyright (0 members)
- Disambiguations (0 members)
- Episodes (26 members)
- Fair use (20 members)
- Files (2 members)
- Forums (6 members)
- General wiki templates (32 members)
- Help (5 members)
- Help desk (2 members)
- Hidden categories (3 members)
- Humans (1 member)
- Image wiki templates (8 members)
- Images (4 members)
- Infobox templates (0 members)
- Infoboxes (1 member)
- Main Page Headers (19 members)
- New pages (0 members)
- Organisation (0 members)
- Organization (9 members)
- Pages proposed for deletion (0 members)
- Pages with broken file link (0 members)
- Pages with broken file links (1 member)
- Policy (2 members)
- Site administration (4 members)
- Site maintenance (5 members)
- Template documentation (50 members)
- Templates (10 members)
- Utility templates (1 member)
- Videos (3 members)
- Watercooler (2 members)
- Wiki Images (6 members)