The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Templates needing attention (6 members)
- Templates not transcluded as of 2016-08 (22 members)
- Templates using ParserFunctions (1 member)
- Templates using TemplateData (1 member)
- Templates with print versions (1 member)
- Temporal templates (1 member)
- Temporary (1 member)
- Tennessee (1 member)
- TestState (1 member)
- Texas (1 member)
- Text Formatting Templates (1 member)
- Text formatting templates (13 members)
- Time and date maintenance templates (2 members)
- Title review (1 member)
- Top Bar (3 members)
- Tracking templates (1 member)
- Traffic sign (5 members)
- Transcludable pages (15 members)
- Translation (3 members)
- Translation candidates (0 members)