The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 19th Century (9 members)
- 19th Century Characters (5 members)
- 19th Century Places (2 members)
- All (2 members)
- Alternate Content (11 members)
- American Medias (24 members)
- Animals (5 members)
- Animated Medias (2 members)
- Artists (3 members)
- Authors (4 members)
- Book Series (2 members)
- Books (5 members)
- Books Characters (12 members)
- British Medias (7 members)
- Candidates for deletion (1 member)
- Cartoons Characters (4 members)
- Characters (103 members)
- Characters Galleries (2 members)
- Characters Portrayers (8 members)
- Comics (2 members)
- Contemporaries Medias (6 members)
- Content (14 members)
- Content including real-life elements (48 members)
- Continents (6 members)
- Days Templates (1 member)
- Days templates (9 members)
- Deceased Characters (13 members)
- Directors (3 members)
- Elementary (11 members)
- Elementary Characters (2 members)
- Elementary Portrayers (2 members)
- Enola Holmes Movies Portrayers (4 members)
- Episodes (9 members)
- Female Characters (27 members)
- Females Characters (2 members)
- Files (600 members)
- Film Series (4 members)
- French Medias (1 member)
- Galleries (3 members)
- Holmes & Watson Portrayers (4 members)
- Homonymies (21 members)
- House M.D. Characters (1 member)
- House M.D. Portrayers (2 members)
- Ian Richardson Duology Portrayers (2 members)
- Infoboxes (17 members)
- Irene Adler Portrayers (3 members)
- James Moriarty Portrayers (8 members)
- Japanese Medias (3 members)
- John Watson Portrayers (8 members)
- Lands and cities (12 members)