The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2014 Comic Series (10 members)
- 2017 Comic Series (48 members)
- A to Z (2,328 members)
- Adults (21 members)
- Advertising (10 members)
- Agates (4 members)
- Alter Ego (6 members)
- Amethyst fans (1 member)
- Amethyst images (14 members)
- Amethysts (5 members)
- Animals (15 members)
- Animation Directors (19 members)
- Antagonists (98 members)
- Aquamarines (3 members)
- Arcade Games (11 members)
- Art Directors (6 members)
- Article management templates (8 members)
- Article stubs (101 members)
- Articles lacking sources (21 members)
- Attack the Light (34 members)
- Background Artists (21 members)
- Backgrounds (1,093 members)
- Badge images (93 members)
- Beach City Citizens (0 members)
- Beach City Locations (39 members)
- Beverages (1 member)
- Bismuths (3 members)
- BlogListingPage (1 member)
- Blog posts (4,563 members)
- Blu-Ray (7 members)
- Books (8 members)
- Bots (3 members)
- Bronze badges (32 members)
- Browser Games (11 members)
- Bubbled (3 members)
- Buck Dewey images (17 members)
- Businesses (16 members)
- Candidates for deletion (86 members)
- Candidates for moving (0 members)
- Candidates for renaming (0 members)
- Cars (6 members)
- Cast and crew images (315 members)
- Category templates (1 member)
- Character Designers (5 members)
- Character galleries (255 members)
- Character histories (12 members)
- Characters (293 members)
- Chat emoticons (174 members)
- Citizens of Beach City (44 members)
- Classroom Gem Shorts (3 members)