Encyclopedias, Almanacs, Transcripts, and Maps
- Political Parties in Independent Ireland
- Political System: Cabinet
- Political System: Constitution
- Political System: Parliament
- Political System: President
- Political System: Prime Minister
- Political Theory
- Politics: 1500 to 1690
- Politics: 1690 to 1800—A Protestant Kingdom
- Politics: 1800 to 1921—Challenges to the Union
- Politics: Impact of the Northern Ireland Crisis on Southern Politics
- Politics: Independent Ireland since 1922
- Politics: Nationalist Politics in Northern Ireland
- Poor Law Amendment Act of 1847 and the Gregory Clause
- Pope, Alexander (1688–1744)
- Popper, Karl (1902–1994)
- Population and Geography
- Population, Economy, and Society from 1750 to 1950
- Population, Gender Ratio of
- Pornography