The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Recurring Guest Characters (RDM) (98 members)
- Recurring Guest Characters (TOS) (25 members)
- Recurring Guest Characters (TRS) (10 members)
- Reins of a Waterfall (63 members)
- Requested Pages (83 members)
- Resistance (34 members)
- Resistance (episode) (49 members)
- Resources (17 members)
- Resurrection Ship (2 members)
- Resurrection Ship, Part I (46 members)
- Resurrection Ship, Part II (54 members)
- Retribution (36 members)
- Revelations (41 members)
- Revival Efforts (13 members)
- SDS (11 members)
- SE (1 member)
- Sacrifice (40 members)
- Saga of a Star World (186 members)
- Sagittaron (8 members)
- Scar (78 members)
- Scattered (119 members)
- Season 1 (1 member)
- Secured Article Candidate (3 members)
- Secured Articles (1 member)
- Separate continuity (1,037 members)
- Separate continuity (1980) (42 members)
- Separate continuity (Original Series) (2 members)
- Separate continuity (RDM) (232 members)
- Separate continuity (TOS) (367 members)
- Series Templates (19 members)
- Series in the Re-Imagined Continuity (8 members)
- Ships (334 members)
- Ships (1880) (6 members)
- Ships (1980) (13 members)
- Ships (2003 Video Game) (16 members)
- Ships (BAC) (10 members)
- Ships (Deadlock) (55 members)
- Ships (RDM) (210 members)
- Ships (TOS) (82 members)
- Ships (TRS) (10 members)
- Ships (Video Game) (17 members)
- Sidebar Templates (5 members)
- Silly Pages (32 members)
- Silly Templates (2 members)
- Sine Qua Non (45 members)
- Six Degrees of Separation (30 members)
- Six of One (53 members)
- Soldiers of the One (19 members)
- Someone To Watch Over Me (2 members)
- Someone to Watch Over Me (42 members)