The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- ''The Intertidal Zone'' series (1 member)
- APM articles in need of formatting (1 member)
- A SquarePants Family Vacation shorts (1 member)
- A SquarePants Family Vacation shorts galleries (1 member)
- A SquarePants Family Vacation shorts transcripts (1 member)
- A whole lot of other crap stubs (1 member)
- Administration (29 members)
- Administrative templates (0 members)
- Administrators (8 members)
- Adminship requests archive (303 members)
- Aggressive Enders (57 members)
- Albums (29 members)
- Aliens (26 members)
- Alternate-universe characters (50 members)
- Amusement ride galleries (6 members)
- Amusement ride transcripts (5 members)
- Amusement rides (31 members)
- Anchovies (54 members)
- Announcements (310 members)
- Announcements templates (3 members)
- Antagonists (1 member)
- App games (38 members)
- Appearance templates (26 members)
- Appearances (3 members)
- Arcade machines (10 members)
- Archive templates (3 members)
- Archived categories (10 members)
- Archived discussions (3 members)
- Archived pages (3 members)
- Archived petitions (93 members)
- Archived projects (2 members)
- Archived proposals (2,259 members)
- Archived templates (0 members)
- Archived user rights review discussions (41 members)
- Archives (110 members)
- Archives by type (4 members)
- Art (9 members)
- Article of the Month (4 members)
- Article of the Month nominations archive (103 members)
- Article of the Month templates (7 members)
- Articles containing speculation (4 members)
- Articles containing spoilers (78 members)
- Articles in need of a proper infobox (6 members)
- Articles in need of an infobox (15 members)
- Articles in need of appearance references (0 members)
- Articles in need of better images (328 members)
- Articles in need of better videos (70 members)
- Articles in need of cleanup (173 members)
- Articles in need of expansion (329 members)
- Articles in need of formatting (3 members)