The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- A Choice with No Regrets (Visual Novel) images (1 member)
- Ackerman clan (11 members)
- Ackerman family (Lost Girls) (4 members)
- Ackermann family (Anime) (11 members)
- Action Images (0 members)
- Active discussions (4 members)
- Administration (19 members)
- Affiliate wordmarks (26 members)
- Albums (17 members)
- Alpha Squad (10 members)
- Animals (0 members)
- Animated GIF (21 members)
- Anime (189 members)
- Anonymous characters (46 members)
- Anthology (60 members)
- Anti-Marleyan Volunteers (9 members)
- Anti-Marleyan Volunteers (Anime) (11 members)
- Anti-Personnel Control Squad (7 members)
- Anti-Personnel Control Squad (Anime) (3 members)
- Arcs (31 members)
- Arlelt family (Anime) (3 members)
- Arlert family (5 members)
- Armin Arlet (1 member)
- Article management templates (2 members)
- Article notice templates (21 members)
- Articles that should be split (2 members)
- Articles with conflicting canon information (2 members)
- Articles without official name (89 members)
- Asian clan (0 members)
- Asian clan (Lost Girls) (3 members)
- Attack on Avengers (7 members)
- Attack on Avengers Chapter Covers (1 member)
- Attack on Avengers images (8 members)
- Attack on School Castes images (25 members)
- Attack on Titan: Before the Fall manga images (445 members)
- Attack on Titan: Before the Fall novel (1 member)
- Attack on Titan: Before the Fall novel images (3 members)
- Attack on Titan: Counter Rockets (1 member)
- Attack on Titan: Counter Rockets images (0 members)
- Attack on Titan: End of the World (Novel) images (1 member)
- Attack on Titan: Hangeki No Noroshi - Episode 1 images (1 member)
- Attack on Titan: Hangeki No Noroshi - Episode 2 images (1 member)
- Attack on Titan: Hangeki No Noroshi - Episode 3 images (1 member)
- Attack on Titan: Hangeki No Noroshi images (4 members)
- Attack on Titan: Hangeki no Noroshi (Novel) images (1 member)
- Attack on Titan: High School images (28 members)
- Attack on Titan: Junior High anime images (196 members)
- Attack on Titan: Junior High manga images (339 members)
- Attack on Titan: Lost Girls manga images (88 members)
- Attack on Titan: Lost Girls novel (1 member)