The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- New Mexico (1 member)
- New Road Layer (35 members)
- New York (8 members)
- Node (4 members)
- Noindexed pages (13 members)
- North Carolina (4 members)
- North Dakota (1 member)
- Northern Mariana Islands (1 member)
- Notable revision 2000/3/21 (2 members)
- Notable revision 2015/2/4 (1 member)
- Notable revision 9/13/90 (1 member)
- Obsolete (90 members)
- Ohio (0 members)
- Oklahoma (1 member)
- Oregon (2 members)
- Page-section templates (1 member)
- Page formatting templates (6 members)
- Page message templates (2 members)
- Pages Needing Attention (45 members)
- Pages using deprecated source tags (1 member)
- Pages using duplicate arguments in template calls (13 members)
- Pages where expansion depth is exceeded (484 members)
- Pages which use = as a template (78 members)
- Pages with TemplateStyles errors (4 members)
- Pages with broken file links (56 members)
- Pages with ignored display titles (3 members)
- Pages with incorrect protection templates (4 members)
- Pages with template loops (5 members)
- Parking Lot (1 member)
- Parking Lot Road (3 members)
- Pennsylvania (3 members)
- PesachZ (1 member)
- Place (7 members)
- Place templates (0 members)
- Placeholder templates (0 members)
- Portal (3 members)
- Portal templates (2 members)
- Positioning templates (1 member)
- Potentially outdated (1 member)
- Programming typing-aid templates (1 member)
- Protected templates (3 members)
- Puerto Rico (0 members)
- Ramp (1 member)
- Red Links (1 member)
- Regional Coordinator template (3 members)
- Request for deletion (0 members)
- Request for global cleanup (0 members)
- Request for global merge (0 members)
- Review For Subpages (0 members)
- Review Purpose (1 member)