The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Incomplete templates (8 members)
- Index (18 members)
- India (0 members)
- Indiana (0 members)
- Indonesia (0 members)
- Info required (6 members)
- Infobox templates (2 members)
- Inline cleanup templates (2 members)
- Inline templates (1 member)
- Internal link maintenance templates (2 members)
- Internal link templates (8 members)
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- Italia (5 members)
- Italy-Italia (1 member)
- JP (19 members)
- JP-EditorInterface (1 member)
- JP-Menu (7 members)
- JP-lmMenu (1 member)
- JP-mpMenu (3 members)
- Junction (13 members)
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- Lang templates (3 members)
- Language Templates (1 member)
- Latvia (1 member)
- Latvijas Veidnes (15 members)
- Linking templates (3 members)
- List formatting templates (2 members)
- List templates (1 member)
- Live Map (0 members)
- Lock (2 members)
- Locking standards (16 members)
- Louisiana (0 members)
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- Maine (0 members)
- Maintenance navigation (2 members)
- Maintenance templates (14 members)
- Major revision 1/14/15 (1 member)
- Major revision 1968-07-03 (1 member)
- Major revision 2014/12/29 (2 members)
- Major revision 2014/12/30 (2 members)
- Major revision 8/5/71 (1 member)
- Make Subpage (0 members)
- Malaysia (2 members)
- Map Raid (1 member)
- Mapraid (29 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)
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- Mathematical function templates (1 member)
- Mbox templates (14 members)
- Mega map raid (1 member)
- Mentoring (3 members)
- Michigan (0 members)
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- Missing Documentation (0 members)
- Missing Template Documentation (80 members)
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- Move to new Mbox format (2 members)
- Místa (0 members)
- Namespace manipulation templates (1 member)
- Navbox (1 member)
- Navbox (navigational) templates (1 member)
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- Need to move to Main NS (3 members)
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- New Road Layer (36 members)
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- Node (4 members)
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- Norway (1 member)
- Notable revision 2005/3/21 (2 members)
- Notable revision 2015/2/4 (1 member)
- Notable revision 9/13/90 (1 member)
- Nuevo (2 members)
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- Obsolete (2 members)
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- Page-section templates (1 member)