The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Sidebars with styles needing conversion (1 member)
- SilkWings (12 members)
- SkyWings (14 members)
- Sloths (3 members)
- Soft redirect templates (1 member)
- Stubs (244 members)
- Template documentation (1 member)
- Template documentation pages (20 members)
- Template namespace templates (2 members)
- Templates (3 members)
- Templates based on the Infobox Lua module (1 member)
- Templates based on the String Lua module (1 member)
- Templates generating microformats (1 member)
- Templates needing substitution checking (1 member)
- Templates that add a tracking category (1 member)
- Templates used by Twinkle (1 member)
- Templates using TemplateData (12 members)
- Tribe (0 members)
- Tribes (11 members)
- Uncategorized pages (9 members)
- Warning templates (2 members)
- WikiProject link templates (1 member)
- Wikipedia metatemplates (2 members)
- Wikipedia modules (1 member)
- Wikipedia never-substituted templates (3 members)
- Wikipedia non-free file copyright templates (1 member)
- Wikipedia non-free images (198 members)
- Wikipedia page-section templates (1 member)
- Wikipedia section templates (3 members)
- Wikipedia templates by order (1 member)
- Winglets (4 members)
- Wrapper templates (1 member)