The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages to be protected (20 members)
- Pages using DynamicPageList3 parser function (73 members)
- Pages using DynamicPageList3 parser tag (24 members)
- Pages using duplicate arguments in template calls (10 members)
- Pages using infobox YouTube personality with unknown parameters (3 members)
- Pages using infobox country with unknown parameters (3 members)
- 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 (1 member)
- 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 (11 members)
- Pages with script errors (10 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 political prisoners (3 members)
- Palestinian resistance reading list (1 member)
- 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 (22 members)
- Philosophers by country (2 members)
- Philosophers by nationality (0 members)
- Philosophy (15 members)
- Photos of the DPRK (0 members)
- Pictures of bus stops in the DPRK (18 members)
- Pictures of the DPRK (15 members)
- Pictures of the DPRK at night (7 members)
- Pie charts (2 members)
- Pipelines (1 member)
- Places (4 members)
- Plagiarists (1 member)
- Podcasters (2 members)
- Podcasts (16 members)
- Poems (7 members)
- Poems by Langston Hughes (2 members)
- Poems by author (1 member)
- Poets (1 member)
- Pol Pot Atrocities (1 member)
- Police (3 members)
- Police (essays) (1 member)
- Political candidates (3 members)
- Political economists (4 members)
- Political economy (13 members)
- Political ideology (10 members)
- Political movements (2 members)
- Political organizations (3 members)
- Political parties (27 members)
- Political parties by country (0 members)
- Political parties by ideology (3 members)
- Political prisoners (2 members)
- Political prisoners in the United States (0 members)
- Political symbolism (1 member)
- Political terminology (10 members)
- Political theorists (13 members)
- Politicians (39 members)
- Politicians by country (3 members)
- Politicians in Canada (1 member)
- Politicians in the United States (24 members)
- Politics (14 members)
- Politics by country (3 members)
- Politics of Japan (1 member)
- Politics of Russia (1 member)
- Politics of the Soviet Union (1 member)
- Politics of the United States of America (7 members)
- Portals with no named maintainer (2 members)
- Portals with short description (2 members)
- Portraits of leaders (3 members)
- Portraits of people (2 members)
- Posters (0 members)
- Postmodernists (1 member)
- Poverty (3 members)
- Prefectures of Japan (1 member)