The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages using DynamicPageList3 parser tag (24 members)
- Pages using duplicate arguments in template calls (9 members)
- Pages using infobox YouTube personality with unknown parameters (3 members)
- Pages using infobox country with unknown parameters (2 members)
- Pages using infobox military person with unknown parameters (1 member)
- Pages using infobox organization with motto or pledge (1 member)
- Pages using infobox organization with unknown parameters (1 member)
- Pages using infobox person with unknown parameters (0 members)
- Pages using infobox revolutionary with unknown parameters (0 members)
- Pages using infoboxes with thumbnail images (2 members)
- Pages with TemplateStyles errors (4 members)
- Pages with broken file links (27 members)
- Pages with ideological conflicts (3 members)
- Pages with ideological deviations (1 member)
- Pages with reference errors (12 members)
- Pages with script errors (11 members)
- Pages with syntax highlighting errors (2 members)
- Pages with too many expensive parser function calls (1 member)
- Paintings (22 members)
- Palestine (2 members)
- Palestinian leaders (2 members)
- Palestinian political prisoners (3 members)
- Palestinian resistance fighters (1 member)
- Palestinian resistance reading list (0 members)
- Pan-Africanism (1 member)
- Pan-nationalism (1 member)
- Party for Socialism and Liberation (1 member)
- Party of Communists USA (1 member)
- Party of Labour of Albania (1 member)
- Patriotic socialism (3 members)
- Patriotic socialists (3 members)
- People (24 members)
- People's Republic of China (30 members)
- People assassinated by the CIA (3 members)
- People assassinated by the FBI (4 members)
- People by class (2 members)
- People by country (4 members)
- People by descent (4 members)
- People by political ideology (16 members)
- People by religion (1 member)
- People critiqued by Lenin (2 members)
- People critiqued by Marx (7 members)
- People from Klagenfurt (1 member)
- People in the United States (4 members)
- People murdered by police (1 member)
- People targeted by regime change operations (6 members)
- Peruvian socialists (2 members)
- Peruvian trade unionists (1 member)
- Philosophers (24 members)
- Philosophers by country (2 members)