The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2017 DNA Lounge Show Photos (43 members)
- Album art (8 members)
- Album articles lacking alt text for covers (11 members)
- Album covers (3 members)
- Album infoboxes lacking a cover (0 members)
- Album track list templates (1 member)
- All free media (3 members)
- All non-free logos (1 member)
- All non-free media (2 members)
- Archive Videos (1 member)
- Archive pages (30 members)
- Articles with hAudio microformats (100 members)
- Articles with hCards (9 members)
- Articles with short description (0 members)
- Arts and culture templates (2 members)
- Audio templates (1 member)
- Biographical templates usable as a module (3 members)
- Branded product covers (1 member)
- Business infobox templates (1 member)
- CC-BY-SA-4.0 (508 members)
- CC license tags (1 member)
- CS1: long volume value (1 member)
- CS1 errors: archive-url (17 members)
- CS1 errors: empty citation (2 members)
- CS1 errors: external links (1 member)
- CS1 errors: invisible characters (1 member)
- CS1 français-language sources (fr) (2 members)
- CS1 maint: others (0 members)
- CS1 maint: unfit URL (2 members)
- CS1 maint: url-status (8 members)
- CS1 Ελληνικά-language sources (el) (2 members)
- Change Your Heart Tour Photos (134 members)
- Citation Style 1 templates (1 member)
- Comic book infobox templates (1 member)
- Comics image templates (1 member)
- Comics infobox image less caption (1 member)
- Company infobox templates (1 member)
- Copyright (3 members)
- Correct title templates (2 members)
- Cover art (11 members)
- Creative Commons Attribution-ShareAlike 3.0 files (2 members)
- Creative Commons copyright templates (2 members)
- Currency copyright tags (8 members)
- Days Of Thunder (0 members)
- Days of Thunder (7 members)
- Disambiguation and redirection templates (1 member)
- Documentation assistance templates (4 members)
- Documentation see also templates (1 member)
- Documentation shared content templates (3 members)
- Documentation subpages without corresponding pages (1 member)