The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- ARAM (5 members)
- Abathur images (6 members)
- Abathur portraits (8 members)
- Abathur skill and talent icons (29 members)
- Abathur skin images (20 members)
- Abathur skin templates (5 members)
- Abilities (8 members)
- Abilities icons (3 members)
- Achievement Portraits (6 members)
- Administration (4 members)
- Alarak images (1 member)
- Alarak skin templates (4 members)
- Alexstrasza images (1 member)
- Alexstrasza skin templates (3 members)
- Aliens (58 members)
- Alterac Pass (6 members)
- Alterac Valley (0 members)
- American teams (35 members)
- Ana images (1 member)
- Ana skin templates (3 members)
- Andorthi (1 member)
- Androthi (0 members)
- Anduin skin templates (3 members)
- Angels (7 members)
- Angiris Council (4 members)
- Announcer (21 members)
- Anub'arak (20 members)
- Anub'arak models (12 members)
- Anub'arak skills and talents icons (24 members)
- Anub'arak skin templates (6 members)
- April Fools (1 member)
- Arakkoa (1 member)
- Arenas (2 members)
- Artanis (1 member)
- Artanis skin templates (6 members)
- Arthas (1 member)
- Arthas skill and talent icons (2 members)
- Arthas skin templates (8 members)
- Article management tags (3 members)
- Articles marked for cleanup (0 members)
- Articles marked for deletion (0 members)
- Articles marked for discussion (4 members)
- Articles that need images (0 members)
- Artists (7 members)
- Asian teams (1 member)
- Aspects (18 members)
- Assassins (8 members)
- Auriel images (1 member)
- Auriel skin templates (4 members)
- Azmodan (2 members)