The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Duration without hAudio microformat (8 members)
- EP art (3 members)
- Early Song Snippets (9 members)
- Embeddable templates (5 members)
- Endless Summer (16 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 templates (1 member)
- Music videos (7 members)
- Musician templates (2 members)
- Namespace manipulation templates (1 member)
- Navboxes using background colours (5 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 (9 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 (19 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 (5 members)
- Pages with YouTube Embeds (0 members)
- Pages with broken file links (602 members)
- Pages with reference errors (2 members)
- Pages with script errors (635 members)
- Pages with short description (122 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 (21 members)