The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Constitutions of the Soviet Union (2 members)
- Continents (8 members)
- Contribute to ProleWiki (6 members)
- Corporate media (1 member)
- Cosmonauts (1 member)
- Countergangs strategy (1 member)
- Counterpropaganda (1 member)
- Counterrevolution (2 members)
- Counterrevolutionaries (10 members)
- Countries (226 members)
- Countries by continent (4 members)
- Countries by ideology (3 members)
- Countries invaded by the United States (23 members)
- Countries sanctioned by the US (8 members)
- Countries targeted by CIA coups (19 members)
- Countries targeted by imperialist aggression (19 members)
- Country data templates of Greece (1 member)
- Country data templates of India (1 member)
- Country data templates of Iran (3 members)
- Country data templates of South Africa (1 member)