The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Articles with hCards (134 members)
- Arts and culture templates (1 member)
- Biographical templates usable as a module (2 members)
- Business infobox templates (1 member)
- CS1: Julian–Gregorian uncertainty (1 member)
- CS1: long volume value (2 members)
- CS1 français-language sources (fr) (1 member)
- CS1 location test (1 member)
- CS1 maint: unfit URL (1 member)
- CS1 Ελληνικά-language sources (el) (1 member)
- Catalog lookup templates (1 member)
- Company infobox templates (1 member)
- Documentation assistance templates (3 members)
- Documentation see also templates (1 member)
- Editnotice templates (2 members)
- Embeddable templates (1 member)
- Fascism templates (2 members)
- Hatnote modules (1 member)
- Hatnote templates with errors (1 member)
- Infobox dox using numbered parameter (1 member)
- Infobox modules (2 members)
- Infobox person using numbered parameter (1 member)
- Infobox templates (6 members)
- Infobox templates using Wikidata (1 member)
- Infobox templates with module parameter (3 members)
- Lua-based infobox templates (1 member)
- Lua-based templates (6 members)
- Lua metamodules (2 members)
- Marriage templates (1 member)
- Medicine external link templates (1 member)
- Microformat (uF) message templates (3 members)
- Modules for image handling (1 member)
- Modules subject to page protection (14 members)
- Modules that add a tracking category (7 members)
- Modules using data from Wikidata (1 member)
- Nationalism templates (1 member)
- Navigational boxes without horizontal lists (1 member)
- No local image but image on Wikidata (6 members)
- Organization infobox templates (2 members)
- Pages used in system messages needing protection (8 members)
- Pages using duplicate arguments in template calls (133 members)
- Pages using infobox dox with unknown empty parameters (16 members)
- Pages using infobox dox with unknown parameters (16 members)
- Pages using infobox officeholder with ambassador from or minister from (3 members)
- Pages using infobox organization with motto or pledge (1 member)
- Pages using infobox person with unknown empty parameters (22 members)
- Pages using infobox person with unknown parameters (18 members)
- Pages which use infobox templates with ignored data cells (2 members)
- Pages with broken file links (429 members)
- Pages with script errors (20 members)
- Pages with too many expensive parser function calls (2 members)
- People and person infobox templates (2 members)
- Placeholder templates (1 member)
- Political ideology sidebar templates (1 member)
- Political ideology templates (2 members)
- Politics and government infobox templates (1 member)
- Politics series sidebar templates (1 member)
- Portal-inline template with redlinked portals (2 members)
- Portal templates with all redlinked portals (2 members)
- Programming typing-aid templates (1 member)
- Rcat template documentation pages (1 member)
- Redirect templates (2 members)
- Redirects for convenience (4 members)
- Redirects from high-use templates (3 members)
- Redirects from merges (5 members)
- Redirects from modifications (6 members)
- Redirects from moves (30 members)
- Redirects from short names (3 members)
- Redirects from shortcuts (1 member)
- Redirects from template shortcuts (25 members)
- Redirects to redirect templates (6 members)
- Resizing templates (1 member)
- Sidebar meta-templates (1 member)
- Sidebars with styles needing conversion (2 members)
- Skinhead (1 member)
- Society and social science infobox templates (1 member)
- Talk message boxes (2 members)
- Television table cell templates (1 member)
- TemplateStyles stylesheets with errors (1 member)
- Template documentation (2 members)
- Template documentation pages (30 members)
- Template namespace templates (1 member)
- Template shell templates (1 member)
- Templates for discussion templates (1 member)
- Templates for redirects resulting from merges or moves (1 member)
- Templates generating COinS (3 members)
- Templates generating hCards (6 members)
- Templates generating microformats (1 member)
- Templates that add a tracking category (5 members)
- Templates tracking Wikidata (1 member)
- Templates used by Twinkle (1 member)
- Templates using TemplateData (13 members)
- Templates using data from Wikidata (2 members)
- Text-specific formatting and function templates (1 member)
- Top icon protection templates (1 member)
- White nationalism (1 member)
- WikiProject Redirect templates (1 member)
- Wikidata templates (1 member)
- Wikipedia administration templates (1 member)
- Wikipedia editnotices (1 member)
- Wikipedia formatting and function templates (1 member)
- Wikipedia infoboxes (1 member)
- Wikipedia metatemplates (1 member)
- Wikipedia pages with incorrect protection templates (23 members)
- Wikipedia templates currently being merged or deleted (2 members)
- Wikipedia utility templates (1 member)