Encyclopedias, Almanacs, Transcripts, and Maps
- Professions: Lawyers
- Professions: Physicians
- Progressive Era
- Progressive Party Documents
- Progressivism Reaches the White House
- Progressivism Sweeps the Nation
- Prohibition of the Slave Trade (1807)
- Prohibitions
- Prokofiev, Sergei (1891–1953)
- Proletkult
- Propaganda and Public Relations, Government
- Propaganda in the American Revolution
- Property
- Proportional Tax
- Propp, Vladimir Iakovlevich
- Proprietary Schools and Academies
- Proslavery Thought
- Prospect Hill
- Prostitutes and Prostitution
- Prostitution