Encyclopedias, Almanacs, Transcripts, and Maps
- Picon, Molly
- Piedmont-Savoy
- Piedras Negras, Guatemala
- Piel, Gerard
- Piemontese
- Piemontese Sinti
- Piero Della Francesca ca. 1412–1492 Italian Painter and Mathematician
- Piérola, Nicolás de (1839–1913)
- Pike, James Albert, Jr.
- Pilcomayo River
- Pima Bajo
- Pima-Papago
- Pimería Alta
- Pinal, Silvia (1931–)
- Pincay, Laffit Alegando, Jr.
- Pindling, Lynden Oscar (1930–2000)
- Pineda-Duque, Roberto (1910–1977)
- Pinedo, Federico (1895–1971)
- Piñera, Virgilio (1912–1979)
- Pingret, Édouard Henri Théophile (1788–1875)