The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 1-800-Magic (6 members)
- A.I. (10 members)
- Achievement Haunter (1 member)
- Achievement Hunter (732 members)
- Achievement Hunter Crew (25 members)
- Achievement Hunter Expansion (3 members)
- Achievement Hunter Members (8 members)
- Achievement Hunter Shows (304 members)
- Achievement Hunter Teams (1 member)
- Achievement Hunter Trivia (13 members)
- Achievement Hunter aliases (3 members)
- Admin (2 members)
- Administrative Tools (1 member)
- Animation (18 members)
- Animator (89 members)
- Antagonists (8 members)
- April Birthday (20 members)
- Archives (1 member)
- Article management templates (6 members)
- Article stubs (830 members)
- Articles Needing Fact Cleanup (6 members)
- Articles needing completion (26 members)
- Artificial Intelligence (3 members)
- Artist (73 members)
- August Birthday (23 members)
- Barotrauma Wiki (1 member)
- Birthdays (12 members)
- Blog posts (84 members)
- Blood Fest Cast and Crew (7 members)
- Blue Team (16 members)
- Broadcast Team (2 members)
- Browse (5 members)
- Camp Camp (88 members)
- Camp Camp Cast (31 members)
- Candidates for deletion (26 members)
- Candidates for speedy deletion (1 member)
- Category templates (4 members)
- Characters (51 members)
- Citations needed (5 members)
- Comedy (18 members)
- Community (16 members)
- Community Voting (1 member)
- Competitions (90 members)
- Completed Series (52 members)
- Content (7 members)
- Contract (21 members)
- Copyright (0 members)
- Countdown (68 members)
- Cow Chop (31 members)
- Credits (1 member)