The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Rulers of England (1 member)
- Russian Marxists (10 members)
- Russian agronomists (1 member)
- Russian state media (2 members)
- Russians (6 members)
- Russians by descent (3 members)
- Russians of Ukrainian descent (4 members)
- SACP comrades (0 members)
- STFU imperialist memes (2 members)
- STFU memes (1 member)
- Sarawak templates (1 member)
- Science (6 members)
- Scientists (3 members)
- Scribunto modules with errors (5 members)
- Search engines (1 member)
- Segregationists (1 member)
- Separatist states (6 members)
- Settler-colonial states (7 members)
- Settler colonialism (7 members)
- Settler colonialism (essays) (1 member)