The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- District of Columbia (1 member)
- Doctorblah (1 member)
- Documentation assistance templates (2 members)
- Documentation pages (7 members)
- Documentation see also templates (1 member)
- Documentation shared content templates (1 member)
- Documentation subpages without corresponding pages (8 members)
- Drawing (3 members)
- Editing (0 members)
- Editor Rank Images (62 members)
- Editor revision/Old images (0 members)
- Editor revision/Old information (0 members)
- Editor revision/Old text (0 members)
- En (0 members)
- En-N (0 members)
- Escape character templates (14 members)
- Examples (2 members)
- Expand template documentation (3 members)
- Florida (0 members)
- Formatting and function templates (1 member)
- Formatting templates (13 members)
- ForumLink using Community (37 members)
- Forum badges (9 members)
- Forum templates (2 members)
- Freeway (1 member)
- GR (0 members)
- Gas Station (5 members)
- Georgia (0 members)
- Global (2 members)
- Global image archive (6 members)
- Graphic templates (2 members)
- Graphics templates (1 member)
- Great Lakes (1 member)
- Guam (1 member)
- Guideline properties (16 members)
- Hatnote templates (5 members)
- Hatnote templates documentation (1 member)
- Hawaii (1 member)
- Hidden categories (3 members)
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- IPhone (1 member)
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- ISO date templates (1 member)
- Icons (14 members)
- Idaho (1 member)
- Illinois (3 members)
- Image required (9 members)
- Image templates (1 member)
- Images (2 members)
- Improper wiki style (0 members)
- Incomplete templates (19 members)
- Index (23 members)
- Indexed pages (2 members)
- Indiana (2 members)
- Indonesia (0 members)
- Info required (7 members)
- Infobox templates (3 members)
- Inline cleanup templates (1 member)
- Inline templates (5 members)
- Interface templates and forms (3 members)
- Internal link maintenance templates (2 members)
- Internal link templates (10 members)
- Iowa (1 member)
- JP (6 members)
- Junction (13 members)
- Kansas (1 member)
- Kentucky (1 member)
- Lang templates (0 members)
- Language Templates (0 members)
- Language templates (1 member)
- Line-handling templates (0 members)
- Linking templates (5 members)
- Live Map (1 member)
- Lock (2 members)
- Locking standards (2 members)
- Louisiana (1 member)
- Maine (3 members)
- Maintenance navigation (1 member)
- Maintenance templates (11 members)
- Major revision 1968-07-03 (1 member)
- Major revision 2000/12/29 (2 members)
- Major revision 2000/12/30 (2 members)
- Major revision 8/5/71 (1 member)
- Make Subpage (5 members)
- Mapraid (55 members)
- Mapraid Images (1 member)
- Mapraid JerseyShore images (12 members)
- Mapraid LA images (18 members)
- Mapraid Ohio Image (15 members)
- Mapraid SC Beachcomber (11 members)
- Mapraid images (4 members)
- Maryland (1 member)
- Mass Edits (1 member)
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- Mathematical function templates (1 member)
- Mbox templates (13 members)
- Mega map raid (7 members)
- Mentoring (10 members)
- Michigan (2 members)
- Mid Atlantic (5 members)