Encyclopedias, Almanacs, Transcripts, and Maps
- Pierre Elliott Trudeau Mountain
- Pig-Nose Turtles (Carettochelyidae)
- Pigeons and Doves (Columbidae)
- Pigs (Suidae)
- Pikas (Ochotonidae)
- Pilgrimage: An Overview
- Pilgrimage: Buddhist Pilgrimage in East Asia
- Pilgrimage: Buddhist Pilgrimage in South and Southeast Asia
- Pilgrimage: Contemporary Jewish Pilgrimage
- Pilgrimage: Eastern Christian Pilgrimage
- Pilgrimage: Hindu Pilgrimage
- Pilgrimage: Muslim Pilgrimage
- Pilgrimage: Roman Catholic Pilgrimage in Europe
- Pilgrimage: Roman Catholic Pilgrimage in the New World
- Pilgrimage: Tibetan Pilgrimage
- Piḷḷai Lokācārya
- pilot fish
- pimpernel
- Pinard de la Boullaye, Henri
- Pinchot, Gifford (1865 – 1946) American Conservationist and Forester