The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2008 script (4 members)
- Antagonists (1 member)
- BTS (4 members)
- Blog posts (4 members)
- Cast (19 members)
- Characters (26 members)
- Community (3 members)
- Content (1 member)
- Dead (5 members)
- Expanded Universe (7 members)
- Fan fiction (7 members)
- Female (2 members)
- Forums (3 members)
- Help (3 members)
- Help desk (1 member)
- Heroes (1 member)
- Images (1 member)
- Interstellar (1 member)
- Interstellar 2016 (2 members)
- Interstellar Wiki (3 members)
- Lazarus Missions (5 members)
- Literature (1 member)
- Locations (11 members)
- Male (1 member)
- Miscellaneous (3 members)
- NASA (28 members)
- Other Info (15 members)
- Pages with broken file links (2 members)
- Planets (6 members)
- Policy (2 members)
- Production (7 members)
- Protagonists (2 members)
- Robots (5 members)
- Site administration (3 members)
- Spacecraft (9 members)
- Suicidal (1 member)
- Supplemental (1 member)
- Tars (1 member)
- Template documentation (11 members)
- Templates (12 members)
- To be deleted (3 members)
- Videos (20 members)
- Watercooler (1 member)
- Websites (2 members)