The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Templates (37 members)
- Templates based on the String Lua module (2 members)
- Templates for redirects from a modification of the target name (1 member)
- Templates for redirects from alternative names (1 member)
- Templates for redirects resulting from merges or moves (1 member)
- Templates generating microformats (1 member)
- Templates that add a tracking category (1 member)
- Templates that are not mobile friendly (1 member)
- Templates using ParserFunctions (4 members)
- Templates using TemplateData (37 members)
- Templates using TemplateStyles (4 members)
- Templates with no visible output (1 member)
- Templates with partial table wikitext (1 member)
- Text color templates (7 members)
- The Murder of Sonic the Hedgehog (2 members)
- Thieves (3 members)
- Toy companies (8 members)
- Transformations (1 member)
- Transwiki guide (4 members)
- Typing-aid templates (5 members)
- Unified table cell templates (7 members)
- Unknown namespace redirect templates (1 member)
- VHS (1 member)
- Video game companies (7 members)
- Villains (3 members)
- Wii U games (2 members)
- Wii Virtual Console games (4 members)
- Wii games (7 members)
- WikiProject Redirect templates (2 members)
- Wikidata modules (1 member)
- Wikipedia-specific image insertion templates (1 member)
- Wikipedia XHTML tag-replacing templates (5 members)
- Wikipedia archived wrapper templates (2 members)
- Wikipedia formatting templates (1 member)
- Wikipedia fully protected templates (1 member)
- Wikipedia help templates (1 member)
- Wikipedia how-to (1 member)
- Wikipedia metatemplates (3 members)
- Wikipedia modules (1 member)
- Wikipedia page-section templates (1 member)
- Wikipedia redirecting (1 member)
- Wikipedia section templates (1 member)
- Wikipedia template help (1 member)
- Wikipedia utility modules (1 member)
- Wikitext processing templates (1 member)
- Wikitext typing-aid templates (6 members)
- Xbox 360 games (6 members)
- Xbox LIVE Arcade games (5 members)
- Xbox One games (9 members)
- Xbox games (3 members)