The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Alert templates (1 member)
- Alert templates/en (1 member)
- Article message templates (2 members)
- Categorizing templates (1 member)
- Categorizing templates/en (1 member)
- Constellation (1 member)
- Documentation templates (1 member)
- Formatting templates (1 member)
- Formatting templates/en (1 member)
- Gadget:TabbedWindow (1 member)
- Header templates (2 members)
- Header templates/en (2 members)
- Icons (1 member)
- Image with comment templates (1 member)
- Images (1 member)
- Infobox templates (1 member)
- Internationalization templates (3 members)
- Internationalization templates/en (2 members)
- Languages pages (1 member)
- Languages pages without translations (1 member)
- Lua-based templates (6 members)
- Lua-based templates/en (1 member)
- Lua String-based templates (2 members)
- Lua metamodules (1 member)
- Mbox templates (1 member)
- Module documentation pages (2 members)
- Modules subject to page protection (4 members)
- Navigation templates (2 members)
- Navigation templates/en (2 members)
- Notice templates (4 members)
- Notice templates/en (1 member)
- Outdated pages (1 member)
- Outdated pages/en (1 member)
- Pages used in system messages needing protection (4 members)
- Pages using deprecated source tags (2 members)
- Pages using the JsonConfig extension (30 members)
- Pages with TemplateStyles errors (2 members)
- Pages with broken file links (1 member)
- Pages with non-numeric formatnum arguments (6 members)
- Pages with script errors (6 members)
- Pages with syntax highlighting errors (1 member)
- Quotation templates (1 member)
- Reference (1 member)
- Talk message boxes (1 member)
- TemplateData documentation (2 members)
- Template documentation (1 member)
- Template documentation/en (1 member)
- Template documentation pages (38 members)
- Template documentation pages/en (20 members)
- Templates (9 members)