The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Poland (1 member)
- Self-published work (5 members)
- Snowshoe (1 member)
- Speculation (2 members)
- Stubs (21 members)
- Sv (1 member)
- Sv-N (1 member)
- Tabby cat (3 members)
- Tuxedo cat (1 member)
- United States (4 members)
- UploadWizard templates (1 member)
- Uploaded with UploadWizard (41 members)
- Vietnam (1 member)
- White (5 members)
- Wikimedia UI icons (2 members)