The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- Presidents of the United States (22 members)
- Professors (2 members)
- Progressives (2 members)
- ProleWiki Finances (3 members)
- ProleWiki Funding Required (1 member)
- ProleWiki administrators (2 members)
- ProleWiki comrades (6 members)
- ProleWiki news (essays) (2 members)
- ProleWiki official pages (12 members)
- ProleWiki policies and guidelines (1 member)
- ProleWiki technical contributor (1 member)
- Proletariat (3 members)
- Propaganda (9 members)
- Propaganda posters (17 members)
- Protest tactics (2 members)
- Protests (8 members)
- Province-level administrative divisions (4 members)
- Provinces of China (9 members)
- Proxy wars (1 member)
- Prussian Army personnel (1 member)
- Pseudo-intellectuals (2 members)
- Pseudoscience (3 members)
- Psychiatry (4 members)
- Publisher Organizations (2 members)
- Publishing companies (1 member)
- Puppet states (2 members)
- Quotes (15 members)
- Race (3 members)
- Racism (15 members)
- Racist propaganda (7 members)
- Racists (9 members)
- Rallies (1 member)
- Reactionaries (31 members)
- Reactionary slogans (1 member)
- Reading lists (9 members)
- Rebellions in the United States (1 member)
- Recipients of the Imperial Order of the Iron Crown (3rd Class) (1 member)
- Recipients of the Iron Cross (1939), 1st class (1 member)
- Recipients of the Iron Cross (1939), 2nd class (1 member)
- Recipients of the Knight's Cross of the Iron Cross (2 members)
- Recipients of the Knight's Cross of the Iron Cross with Oak Leaves (1 member)
- Recipients of the Knight's Cross of the Iron Cross with Oak Leaves, Swords, and Diamonds (1 member)
- Recipients of the Knight's Cross of the Iron Cross with Oak Leaves and Swords (1 member)
- Recipients of the Pour le Mérite (military class) (1 member)
- Recipients of the Silver Medal for Bravery (Austria), 1st class (1 member)
- Red Army officers (1 member)
- Red Army soldiers (6 members)
- Red Clarion article (1 member)
- Redirect pages (1 member)
- Redirects connected to a Wikibase item (4 members)
- Regions of the Russian Federation (1 member)
- Regions of the UK (4 members)
- Relation of production (1 member)
- Religion (7 members)
- Religions (5 members)
- Republic of Korea (1 member)
- Republics of the Soviet Union (8 members)
- Restaurant chains (1 member)
- Retired comrades (3 members)
- Revisionism (14 members)
- Revisionists (14 members)
- Revolution (1 member)
- Revolutionaries (26 members)
- Revolutionaries by nationality (4 members)
- Revolutionary Base Area (1 member)
- Revolutionary tactics (1 member)
- Revolutions (9 members)
- Right-wing ideologies (22 members)
- Right wing political parties (4 members)
- Rockefeller family (1 member)
- Rodney family of Delaware (1 member)
- Rulers of England (1 member)
- Russian Marxists (10 members)
- Russian agronomists (1 member)
- Russian state media (2 members)
- Russians (6 members)
- Russians by descent (3 members)
- Russians of Ukrainian descent (4 members)
- SACP comrades (0 members)
- STFU imperialist memes (2 members)
- STFU memes (1 member)
- Sarawak templates (1 member)
- Science (6 members)
- Scientists (3 members)
- Scribunto modules with errors (5 members)
- Search engines (1 member)
- Segregationists (1 member)
- Separatist states (6 members)
- Settler-colonial states (7 members)
- Settler colonialism (7 members)
- Settler colonialism (essays) (1 member)
- Sexism (2 members)
- Sign languages (1 member)
- Sino-Soviet split (1 member)
- Slave owners (5 members)
- Slavery (7 members)
- Slogans (11 members)
- Slogans in China (1 member)
- Slogans in the USSR (1 member)
- Slogans of the Communist Party of China (1 member)
- Slums (3 members)
- Social class (8 members)
- Social democracy (1 member)
- Social democratic parties (4 members)
- Social democrats (3 members)
- Social indicators (1 member)
- Social issues (10 members)
- Social media (7 members)
- Socialism (15 members)
- Socialism by country (11 members)
- Socialism in Albania (1 member)
- Socialism in Chile (1 member)
- Socialism in Germany (3 members)
- Socialism in India (2 members)
- Socialism in Ireland (1 member)
- Socialism in Japan (1 member)
- Socialism in Norway (1 member)
- Socialism in Poland (1 member)
- Socialism in the Netherlands (1 member)
- Socialism in the United States (7 members)
- Socialist Space Programs (1 member)
- Socialist art (2 members)
- Socialist intelligence agencies (4 members)
- Socialist leaders (2 members)
- Socialist media outlets (17 members)
- Socialist newspapers (22 members)
- Socialist podcasts (17 members)
- Socialist political parties (10 members)
- Socialist realism (3 members)
- Socialist rulers (8 members)
- Socialist states (7 members)
- Socialists (18 members)
- Socialists by nationality (3 members)
- Sociology (2 members)
- Software (4 members)
- Soldiers (2 members)
- Solzhenitsyn family (1 member)
- Song lyrics (30 members)
- South Korea (0 members)
- Soviet Union (4 members)
- Soviet Union navigational boxes (1 member)
- Soviet Union portal (3 members)
- Soviet agronomists (1 member)
- Soviet anti-USA posters (6 members)
- Soviet anti-fascist posters (1 member)
- Soviet military personnel of the Russian Civil War (1 member)
- Soviet military personnel of the Spanish Civil War (1 member)
- Soviet politicians (17 members)
- Soviet propaganda posters (37 members)
- Space Programs (1 member)
- Speeches (14 members)
- Speeches by Enver Hoxha (1 member)
- Speeches by Fidel Castro (1 member)
- Speeches by Mao Zedong (1 member)
- Spies (1 member)
- Sports (2 members)
- State bodies (2 members)
- State emblems (2 members)
- State ideologies (3 members)
- State media (6 members)
- State media of anti-imperialist countries (4 members)
- State media of imperialist countries (0 members)
- State media of socialist countries (1 member)
- States (4 members)
- States of India (1 member)
- Statesian Marxists (5 members)
- Statesian anti-communists (1 member)
- Statesian communist parties (14 members)
- Statesian communists (33 members)
- Statesian historians (1 member)
- Statesian journalists (6 members)
- Statesian political prisoners (16 members)
- Statesian politicians (9 members)
- Statesian slave owners (9 members)
- Statesians by descent (9 members)
- Statesians of Belarusian descent (1 member)
- Statesians of Canadian descent (1 member)
- Statesians of English descent (7 members)
- Statesians of French descent (3 members)
- Statesians of German descent (3 members)
- Statesians of Irish descent (4 members)
- Statesians of Italian descent (4 members)
- Statesians of Polish descent (2 members)