The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• About the World Federalists Party of Kodiak‏‎ (0 members)
• Active Laws‏‎ (5 members)
• Algonquian multilingual support templates‏‎ (1 member)
• Archival templates‏‎ (4 members)
• Article message templates‏‎ (1 member)
• Articles with hatnote templates targeting a nonexistent page‏‎ (1 member)
• Balto-Slavic multilingual support templates‏‎ (1 member)
• Biographical templates usable as a module‏‎ (1 member)
• Blog posts‏‎ (0 members)
• Candidates for deletion‏‎ (0 members)
• Character-substitution templates‏‎ (2 members)
• Character templates‏‎ (4 members)
• Checkmark insertion templates‏‎ (1 member)
• Chess‏‎ (1 member)
• Collapse templates‏‎ (6 members)
• Community‏‎ (1 member)
• Conscription‏‎ (1 member)
• Constituency infobox templates‏‎ (1 member)
• Conversion templates‏‎ (1 member)
• Coordinates conversion templates‏‎ (1 member)
• Coordinates templates‏‎ (1 member)
• Country templates‏‎ (1 member)
• Cross-reference templates‏‎ (1 member)
• Data retrieval templates‏‎ (1 member)
• Date-computing templates‏‎ (2 members)
• Date mathematics templates‏‎ (14 members)
• Definition list templates‏‎ (4 members)
• Diplomatic Correspondence‏‎ (1 member)
• Disambiguation and redirection templates‏‎ (5 members)
• Disambiguations‏‎ (0 members)
• Documentation assistance templates‏‎ (6 members)
• Documentation header templates‏‎ (5 members)
• Documentation see also templates‏‎ (2 members)
• Documentation shared content templates‏‎ (7 members)
• Documentation templates‏‎ (1 member)
• Election and referendum infobox templates‏‎ (1 member)
• Embeddable templates‏‎ (2 members)
• Enhanced quote templates‏‎ (1 member)
• Error-handling modules‏‎ (3 members)
• Error-message templates‏‎ (1 member)
• Example-formatting templates‏‎ (1 member)
• Explanatory footnote templates‏‎ (1 member)
• External link templates‏‎ (3 members)
• Foreign Affairs‏‎ (1 member)
• Forum Archive‏‎ (1 member)
• General wiki templates‏‎ (9 members)
• Germanic multilingual support templates‏‎ (1 member)
• Glossary templates‏‎ (4 members)
• Graphics templates‏‎ (1 member)
• HTML typing-aid templates‏‎ (1 member)