The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Article management templates (4 members)
- Article stubs (0 members)
- BlogListingPage (0 members)
- Blog posts (2 members)
- Browse (9 members)
- Candidates for deletion (0 members)
- Candidates for speedy deletion (0 members)
- Category templates (3 members)
- Clownettes (9 members)
- Clowns (104 members)
- Community (6 members)
- Content (1 member)
- Copyright (0 members)
- Disambiguations (0 members)
- Evil Clowns (172 members)
- Files (2 members)
- Films (9 members)
- Forums (6 members)
- General wiki templates (34 members)
- Help (5 members)
- Help desk (2 members)
- Hidden categories (3 members)
- Image wiki templates (9 members)
- Images (4 members)
- Infobox templates (10 members)
- Jesters (26 members)
- Minor clowns (0 members)
- New pages (0 members)
- Objects (2 members)
- Organisation (0 members)
- Organization (9 members)
- Pages proposed for deletion (0 members)
- Pages using ISBN magic links (1 member)
- Pages with broken file link (0 members)
- Pages with broken file links (5 members)
- Policy (2 members)
- Site administration (4 members)
- Site maintenance (5 members)
- Template documentation (60 members)
- Templates (11 members)
- Users (5 members)
- Videos (1 member)
- Watercooler (2 members)
- Weapons (12 members)