The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Action templates (341 members)
- Adepta Sororitas (4 members)
- Adepta Sororitas units (21 members)
- Adeptus Mechanicus (3 members)
- Adeptus Mechanicus units (22 members)
- Astra Militarum (8 members)
- Astra Militarum buildings (15 members)
- Astra Militarum fortifications (1 member)
- Astra Militarum tech tree (0 members)
- Astra Militarum units (25 members)
- Attribute templates (39 members)
- Building icons (51 members)
- Building trait templates (21 members)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- ChaosSpaceMarines (1 member)
- Chaos Space Marine units (24 members)
- Chaos Space Marines (2 members)
- Citation needed (0 members)
- Cleanup (6 members)
- Community (5 members)
- Construct templates (2 members)
- Copyright templates (12 members)
- CraftworldAeldari (1 member)
- Craftworld Aeldari (2 members)
- Craftworld Aeldari units (24 members)
- Disambiguations (0 members)
- Documentation templates (3 members)
- Drukhari (3 members)
- Drukhari units (21 members)
- Faction navbox templates (13 members)
- Factions (23 members)
- Formatting templates (22 members)
- Front page sections (4 members)
- Game data templates (16 members)
- Game updates (35 members)
- Hidden categories (0 members)
- Icons (154 members)
- Images (10 members)
- Images needing improvement (0 members)
- Infobox templates (8 members)
- Legal notices (3 members)
- Media (2 members)
- Modding (11 members)
- Modding images (33 members)
- Navigation templates (3 members)
- Necron buildings (12 members)
- Necron fortifications (0 members)
- Necron heroes (0 members)
- Necron tech tree (1 member)