The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- AnarWiki (792 members)
- Anarcha-Feminism (5 members)
- Anarcha-Feminist Groups (2 members)
- Anarcha-Feminists (2 members)
- Anarchism (112 members)
- Anarchisms (4 members)
- Anarchist (1 member)
- Anarchist Books (3 members)
- Anarchist Media (1 member)
- Anarchist Organizations (12 members)
- Anarchist Societies (36 members)
- Anarchist schools of thought (7 members)
- Anarchists (64 members)
- Anarcho-Capitalism (1 member)
- Anarcho-Collectivists (1 member)
- Anarcho-Communism (29 members)
- Anarcho-Communist Groups (1 member)
- Anarcho-Communists (10 members)
- Anarcho-Naturists (1 member)
- Anarcho-Syndicalism (39 members)
- Anarcho-Syndicalist Groups (16 members)
- Anarcho-Syndicalists (15 members)
- Anarchopedia Import (2 members)
- Anarchy In Action Import (1 member)
- Animal Liberation Front (1 member)
- Animal Rights (1 member)
- Animal rights and politics (1 member)
- Animal rights movement (1 member)
- Animal welfare (1 member)
- Anthropology (4 members)
- Anti-Colonial Uprising (2 members)
- Anti-Colonialism (10 members)
- Anti-Colonialists (1 member)
- Anti-Conscription (1 member)
- Anti-Corruption Activists (1 member)
- Anti-Dam Actions (1 member)
- Anti-Eviction Actions (3 members)
- Anti-Fascism (17 members)
- Anti-Fascists (6 members)
- Anti-Imperialism (5 members)
- Anti-Leninism (5 members)
- Anti-Militarism (1 member)
- Anti-Racism (4 members)
- Anti-Racists (2 members)
- Anti-Roads Campaigns (2 members)
- Anti-Semitism (1 member)
- Anti-War Movements (1 member)
- Arab Spring (6 members)
- Argentina (4 members)
- Arguments (2 members)