The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages using Tabber parser tag (259 members)
- Pages using duplicate arguments in template calls (3 members)
- Pages with Hulu Content (33 members)
- Pages with broken file links (48 members)
- Pages with deletion discussions (18 members)
- Pages with iFrames (143 members)
- Pages with ignored display titles (8 members)
- Pages with non-numeric formatnum arguments (51 members)
- Pages with reference errors (4 members)
- ParserFunctions (1 member)
- Pegasus (15 members)
- Pegasus (Extended Version) (15 members)
- Pegasus (episode) (72 members)
- People from Aerilon (5 members)
- People from Aquaria (0 members)
- People from Canceron (1 member)
- People from Caprica (16 members)
- People from Earth (63 members)
- People from Gemenon (7 members)
- People from Kobol (4 members)
- People from Leonis (0 members)
- People from Libra (0 members)
- People from Picon (1 member)
- People from Sagittaron (12 members)
- People from Scorpia (1 member)
- People from Tauron (16 members)
- People from Virgon (1 member)
- Pictures of the Day (12 members)
- Pilot (19 members)
- Pilot (Caprica) (110 members)
- Places (174 members)
- Places (1880) (4 members)
- Places (1980) (15 members)
- Places (RDM) (49 members)
- Places (TOS) (51 members)
- Places (TRS) (3 members)
- Places on Caprica (32 members)
- Places on Libran (1 member)
- Places on Sagittaron (3 members)
- Planets (76 members)
- Planets (1880) (5 members)
- Planets (1980) (4 members)
- Planets (BAC) (1 member)
- Planets (RDM) (21 members)
- Planets (TOS) (37 members)
- Planets (TOS-DE alternate) (3 members)
- Planets (TRS) (3 members)
- Podcasts (90 members)
- Podcasts (Episodes) (85 members)
- Podcasts (Other) (1 member)