The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Battlestar Wiki matrix templates (9 members)
- Battlestar Wiki policies (62 members)
- Battlestar Wiki proposed policies (12 members)
- Battlestar Wiki reference templates (2 members)
- Battlestar Wiki tutorial (14 members)
- Battlestars (33 members)
- Battlestars (RDM) (14 members)
- Battlestars (TOS) (13 members)
- Behind the Scenes (306 members)
- Beings of Light (1 member)
- Black Market (115 members)
- Black is the Color of My True Love's Hair (1 member)
- Blocked Battlestar Wiki users (1 member)
- Blood & Chrome (2 members)
- Blood and Chrome (85 members)
- Blood on the Scales (46 members)
- Blowback (26 members)
- Blu-rays (12 members)
- Blu-rays (RDM) (8 members)
- Blu-rays (Region 1) (3 members)
- Blu-rays (Region 2) (5 members)
- Books (64 members)
- Books (Richard Hatch) (28 members)
- Boomer (TOS) (1 member)
- Borellian Nomen (7 members)
- Bots (4 members)
- CAP (1 member)
- Cain (TOS) (1 member)
- Candidates for deletion (25 members)
- Candidates for protection (0 members)
- Candidates for speedy deletion (1 member)
- Caprica (71 members)
- Caprica (RDM) (31 members)
- Caprica (TOS) (1 member)
- Caprica (series) (455 members)
- Caprica Buccaneers (1 member)
- Caprica pilot (3 members)
- Card Game (3 members)
- Cast (652 members)
- Cast (1980) (68 members)
- Cast (2003 Video Game) (8 members)
- Cast (BAC) (7 members)
- Cast (Caprica) (123 members)
- Cast (Deadlock) (10 members)
- Cast (RDM) (430 members)
- Cast (TOS) (140 members)
- Cast (TRS) (14 members)
- Cast (TSC) (4 members)
- Categories to be Cleaned Up (0 members)
- Characters (1,152 members)
- Characters (1880) (17 members)
- Characters (1980) (129 members)
- Characters (2003 Video Game) (18 members)
- Characters (BAC) (17 members)
- Characters (Caprica) (94 members)
- Characters (Deadlock) (10 members)
- Characters (RDM) (615 members)
- Characters (Richard Hatch) (4 members)
- Characters (TOS) (157 members)
- Characters (TOS-DE) (5 members)
- Characters (TOS-RH) (27 members)
- Characters (TRS) (40 members)
- Characters (TSC) (1 member)
- Characters (Video Game) (19 members)
- Characters (jp) (4 members)
- Characters Portrayed by Multiple Actors (33 members)
- Citation templates (19 members)
- Cite Book templates (4 members)
- Cite Episode templates (1 member)
- Classic Battlestar Galactica Vol. 1 (46 members)
- Classic Battlestar Galactica Vol. 2 (118 members)
- Classic Battlestar Galactica Vol. 3 (40 members)
- Collaborators (40 members)
- Collision Course! (1 member)
- Colonial (750 members)
- Colonial (RDM) (6 members)
- Colonial Arts (15 members)
- Colonial Battles (103 members)
- Colonial Battles (1980) (8 members)
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- Colonial Battles (RDM) (3 members)
- Colonial Battles (TOS) (46 members)
- Colonial Battles (TRS) (38 members)
- Colonial Craft (236 members)
- Colonial Craft (1980) (5 members)
- Colonial Craft (BAC) (10 members)
- Colonial Craft (Deadlock) (32 members)
- Colonial Craft (RDM) (173 members)
- Colonial Craft (TOS) (45 members)
- Colonial Craft (TRS) (7 members)
- Colonial Day (64 members)
- Colonial Government (27 members)
- Colonial Government (RDM) (17 members)
- Colonial Government (TOS) (9 members)
- Colonial History (99 members)
- Colonial History (Deadlock) (1 member)
- Colonial History (RDM) (60 members)
- Colonial History (TOS) (21 members)
- Colonial History (TRS) (2 members)
- Colonial Military (224 members)