The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages with broken file links (20 members)
- Pages with reference errors (2 members)
- Pages with script errors (22 members)
- Pages with template loops (2 members)
- Philosophy external link templates (1 member)
- Redirect category shell without parameters (16 members)
- Redirect formatting templates (1 member)
- Redirect tracking categories (3 members)
- Redirects from alternative names (3 members)
- Redirects from high-use templates (3 members)
- Redirects from incorrect names (1 member)
- Redirects from long names (2 members)
- Redirects from merges (3 members)
- Redirects from modifications (4 members)
- Redirects from moves (38 members)
- Redirects to embedded anchors (2 members)
- Redirects to redirect templates (6 members)
- Redirects to templates (1 member)
- Semantic markup templates (0 members)
- Short description with empty Wikidata description (4 members)