The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Podcasts (Season 1) (28 members)
- Podcasts (Season 2) (21 members)
- Podcasts (Season 3) (20 members)
- Podcasts (Season 4) (12 members)
- Podcasts needing verification (15 members)
- Policy Templates (5 members)
- Politics (The Caprican) (17 members)
- Poll Templates (9 members)
- Portal Templates (6 members)
- Portals (13 members)
- Positions (9 members)
- Possible Copyright Infringements (0 members)
- Possible copyright violations (0 members)
- Precipice (49 members)
- Previous featured article candidate(s) (37 members)
- Previous featured picture candidate(s) (37 members)
- Producers (46 members)
- Producers (1980) (3 members)
- Producers (Caprica) (6 members)
- Producers (RDM) (18 members)
- Producers (TOS) (3 members)
- Producers (TRS) (1 member)
- Production Companies (5 members)
- Production Companies (RDM) (4 members)
- Profanity (8 members)
- Professional Pyramid Players (5 members)
- Project Page (0 members)
- Project Page/sv:Kategori:Projektsida (0 members)
- Props (2 members)
- Protected Items (2 members)
- Pyramid teams (1 member)
- Quality Templates (3 members)
- Quality article (16 members)
- Quality article candidate (25 members)
- Quality article discussion (28 members)
- Quality article talk archives (9 members)
- Quantum Mechanix (3 members)
- Quick Nav Templates (4 members)
- RDM (2,490 members)
- RDM Broadcast Date Templates (159 members)
- RDM Release Date Templates (82 members)
- Raptors (17 members)
- Rapture (53 members)
- Razor (98 members)
- Razor Flashbacks (21 members)
- Realm Press Comics (50 members)
- Rebirth (80 members)
- Recurring Characters (1980) (8 members)
- Recurring Guest Characters (1980) (4 members)
- Recurring Guest Characters (Caprica) (12 members)