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 (9 members)
- Album covers (2 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 (1 member)
- Archive Videos (1 member)
- Archive pages (30 members)
- Articles with hAudio microformats (96 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 (494 members)
- CC license tags (1 member)
- CS1: long volume value (1 member)
- CS1 errors: archive-url (30 members)
- CS1 errors: empty citation (2 members)
- CS1 errors: external links (2 members)
- CS1 français-language sources (fr) (2 members)
- CS1 maint: others (0 members)
- CS1 maint: unfit URL (2 members)
- CS1 maint: url-status (7 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)
- Duration with input error (2 members)
- Duration without hAudio microformat (8 members)
- EP art (3 members)
- Early Song Snippets (9 members)
- Embeddable templates (5 members)
- Endless Summer (15 members)
- Explanatory footnote templates (1 member)
- External link templates using Wikidata (1 member)
- Facebook Archive (1 member)
- Fall 2018 Tour Photos (38 members)
- Fall 2019 Tour Photos (58 members)
- Fall 2021 and Spring 2022 Tour Photos (83 members)
- Fall 2023 North American Tour Photos (130 members)
- File copyright tags (2 members)
- File message boxes (102 members)
- File namespace templates (3 members)
- Film templates (2 members)
- Finland templates (1 member)
- Floppy Disk Articles (9 members)
- Function templates (1 member)
- Graphic novel pop (1 member)
- Graphics templates (1 member)
- Hatnote templates (1 member)
- Heavily used templates (3 members)
- Heroes (14 members)
- Hidden categories (8 members)
- Horror Show (8 members)
- Imported vocabulary (7 members)
- Infobox modules (1 member)
- Infobox templates (10 members)
- Infobox templates using Wikidata (1 member)
- Infobox templates with module parameter (4 members)
- Interface Icons (3 members)
- Internationalization templates (1 member)
- Intricate templates (3 members)
- Kids (10 members)
- Layout templates (4 members)
- License tags attribution (1 member)
- License tags share-alike (1 member)
- List formatting and function templates (2 members)
- Listen template using plain parameter (2 members)
- Logo (1 member)
- Logos (3 members)
- Lore (4 members)
- Lua-based templates (36 members)
- Marriage templates (1 member)
- Microformat (uF) message templates (5 members)
- Microsoft-related templates (1 member)
- Modules for general use (1 member)
- Modules in beta (2 members)
- Modules subject to page protection (15 members)
- Modules that add a tracking category (3 members)
- Modules that check for strip markers (1 member)
- Modules tracking Wikidata (1 member)
- Modules using data from Wikidata (1 member)
- Monsters (17 members)
- Mozilla-related templates (1 member)
- Multi-column templates (6 members)
- Music Videos (1 member)
- Music infobox templates (14 members)
- Music infoboxes with malformed table placement (7 members)
- Music templates (1 member)
- Music videos (7 members)
- Musician templates (2 members)
- Namespace manipulation templates (1 member)
- Navboxes using background colours (4 members)
- Navigational box wrapper templates (2 members)
- Navigational boxes (1 member)
- Navigational boxes without horizontal lists (4 members)
- Needs fixing (1 member)
- New Zealand copyright tags (2 members)
- Nocturnal (8 members)
- Noindexed pages (1 member)
- Non-free posters (23 members)
- Non-free use rationale templates (0 members)
- Official website not in Wikidata (1 member)
- Organization infobox templates (1 member)
- Pages used in system messages needing protection (3 members)
- Pages using DynamicPageList3 parser tag (16 members)
- Pages using Tabber parser tag (18 members)
- Pages using div col with small parameter (3 members)
- Pages using duplicate arguments in template calls (2 members)
- Pages using infobox templates with ignored data cells (2 members)
- Pages using track listing with unknown parameters (3 members)
- Pages with YouTube Embeds (0 members)
- Pages with broken file links (603 members)
- Pages with reference errors (1 member)
- Pages with script errors (660 members)
- Pages with short description (121 members)
- Paralympics task force (1 member)
- People (25 members)
- People and person infobox templates (5 members)
- Polaroids (554 members)
- Positioning templates (1 member)
- Protection templates (1 member)
- Public domain copyright templates (1 member)
- Public domain images (3 members)
- Public domain images ineligible for copyright (shape) (1 member)
- Red, White and Bruised: The Midnight Live (1 member)
- Related-topic templates (1 member)
- Releases (12 members)
- Remixes (20 members)
- Restriction tags (1 member)
- Scribunto modules with errors (15 members)
- Self-published work (275 members)
- Semantic markup templates (2 members)
- Sidebars with styles needing conversion (1 member)
- Singles (23 members)
- Site (1 member)
- Software media templates (2 members)
- Software templates (2 members)
- Somecat (2 members)
- Somecat1 (2 members)
- Somecat2 (2 members)
- Somecat3 (2 members)
- Song articles with both composer and songwriter (87 members)
- Song articles with both lyricist and songwriter (87 members)
- Songs (87 members)
- Spring 2019 Tour Photos (30 members)
- Structured Data on Commons templates (1 member)
- TV Videos (58 members)
- Table templates (1 member)
- Talk message boxes (1 member)
- Television templates (2 members)
- TemplateData documentation (1 member)
- TemplateStyles stylesheets with errors (1 member)
- Template documentation pages (91 members)
- Template namespace templates (2 members)
- Templates based on the Citation/CS1 Lua module (1 member)
- Templates based on the Infobox Lua module (1 member)
- Templates generating COinS (3 members)
- Templates generating hAudio microformats (5 members)
- Templates generating hCalendars (4 members)
- Templates generating hCards (6 members)
- Templates generating microformats (1 member)
- Templates not safe for use in citation templates (1 member)
- Templates that add a tracking category (22 members)
- Templates that generate named references (1 member)
- Templates that generate short descriptions (5 members)
- Templates tracking Wikidata (1 member)
- Templates used by AutoWikiBrowser (1 member)
- Templates used by Twinkle (1 member)
- Templates using TemplateData (43 members)
- Templates using TemplateStyles (10 members)
- Templates using an unknown approach for internationalisation (1 member)
- Templates using data from Wikidata (3 members)
- Templates using the Wikipedia license migration system (3 members)
- Test cases using output parameter (2 members)
- Text-specific formatting and function templates (2 members)
- The Midnight Accessories (33 members)
- The Midnight Apparel (76 members)
- The Midnight Merchandise (149 members)
- The Midnight Outerwear (16 members)
- The Midnight Physical Releases (2 members)
- The Midnight Posters (22 members)
- The Midnight Prints (5 members)
- The Midnight Shadows (22 members)
- The Midnight Shirts (56 members)
- The Midnight Tour Posters (16 members)
- Ticker symbol templates (1 member)
- Top icon protection templates (3 members)
- Topic-specific metatemplates (2 members)
- Tour posters (1 member)
- Tours (12 members)
- Track listings with input errors (1 member)
- Transwiki guide (2 members)
- Typing-aid templates (3 members)
- Video game media templates (2 members)
- Videos (59 members)
- Websites templates (1 member)
- WikiProject Albums templates (3 members)
- WikiProject Musicians templates (5 members)
- WikiProject Olympics (2 members)
- WikiProject Scouting templates (1 member)
- WikiProject Short descriptions (1 member)
- WikiProject Songs templates (2 members)
- Wikidata templates (1 member)
- Wikipedia administration templates (1 member)
- Wikipedia citation administration (1 member)
- Wikipedia editor help (1 member)
- Wikipedia file copyright templates (1 member)
- Wikipedia files tagged as own work (276 members)
- Wikipedia fully protected files (4 members)
- Wikipedia indefinitely move-protected pages (4 members)
- Wikipedia infoboxes (1 member)
- Wikipedia license migration templates (3 members)
- Wikipedia metatemplates (1 member)
- Wikipedia multilingual support templates (1 member)
- Wikipedia non-free file copyright templates (94 members)
- Wikipedia non-free files with NFUR stated (1 member)
- Wikipedia pages with incorrect protection templates (50 members)
- Wikipedia template categories (1 member)
- Wikipedia transclusionless templates (4 members)
- Wikipedia utility templates (1 member)