The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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 (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 (10 members)
- Function templates (1 member)
- Graphic novel pop (1 member)
- Graphics templates (1 member)
- Hatnote templates (1 member)
- Heavily used templates (3 members)
- Heroes (15 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)