The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- + (1 member)
- 100th Episodes (4 members)
- Acrobats (1 member)
- Actors (8 members)
- Adventures of Superman (1 member)
- Adventures of Superman Characters (1 member)
- Agender Characters (0 members)
- Airports (1 member)
- Alleyways (1 member)
- Alternate Realities (1 member)
- Amazons (6 members)
- Angels (2 members)
- Aquaman and the Lost Kingdom Special (3 members)
- Archais (1 member)
- Archers (11 members)
- Arcs (34 members)
- Arkham Asylum (1 member)
- Arkham Asylum Seasons (1 member)
- Arrow (6 members)
- Arrow (Comic Series) (3 members)
- Arrow Characters (124 members)
- Arrow Episodes (41 members)
- Arrow Seasons (16 members)
- Arrow Soundtracks (4 members)
- Arrowverse (45 members)
- Article Stubs (706 members)
- Articles with Conjectural Titles (112 members)
- Artificial Intelligences (7 members)
- Artists (2 members)
- Asgardians (1 member)
- Assassins (12 members)
- Assistants (12 members)
- Athletes (16 members)
- Atlanteans (3 members)
- Authors (5 members)
- Avenues (1 member)
- Baristas (2 members)
- Bartenders (7 members)
- Base of Operations (35 members)
- BatVerse (7 members)
- BatVerse Characters (6 members)
- Batman: Classic TV Series (11 members)
- Batman: Classic TV Series Characters (21 members)
- Batman: Classic TV Series Episodes (5 members)
- Batman: Classic TV Series Seasons (4 members)
- Batman: Classic TV Series Shorts (1 member)
- Batman: The Motion Picture Anthology (4 members)
- Batman: The Motion Picture Anthology Characters (7 members)
- Batman '66 (1 member)
- Batman '66 Meets Wonder Woman '77 (1 member)