The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Caribbean (12 members)
- Central Africa (9 members)
- Central African Republic (1 member)
- Central America (18 members)
- Chad (1 member)
- Characters (14 members)
- Chemistry (1 member)
- Chile (5 members)
- China (15 members)
- Chris Pallis (9 members)
- Christian Anarchism (1 member)
- Christian Anarchists (1 member)
- Christian anarchism (1 member)
- Christianity (3 members)
- Christianity and political ideologies (1 member)
- Civil Rights Movement (4 members)
- Civil Wars (1 member)
- Cold War (1 member)
- Colombia (1 member)
- Colonial States (22 members)
- Colonialism (1 member)
- Commons (4 members)
- Communalism (5 members)
- Communism (3 members)
- Communists (4 members)
- Community Organizing (5 members)
- Concepts (103 members)
- Congo (2 members)
- Conservatism (1 member)
- Conspiracy Theories (9 members)
- Consumer Cooperatives (1 member)
- Cooperatives (9 members)
- Costa Rica (2 members)
- Council Communism (3 members)
- Council Communists (2 members)
- Coups (1 member)
- Crimes Against Humanity (3 members)
- Criminal Justice (1 member)
- Cuba (5 members)
- Current Anarchist Societies (12 members)
- Czechia (4 members)
- David Graeber (3 members)
- Decolonisation (1 member)
- Deforestation (3 members)
- Democracy (7 members)
- Democratic Confederalism (4 members)
- Democratic Militias (1 member)
- Democratic Republic of the Congo (1 member)
- Democratic Socialism (1 member)
- Denmark (3 members)