Historic figures: P
- Emmeline Pankhurst (1858 - 1928) - leader of the suffragette campaign to win the vote
- Charles Parnell (1846 - 1891) - 19th century Irish nationalist leader
- Louis Pasteur (1822 - 1895) - French chemist, biologist, proved the germ theory of disease
- St Patrick (5th century AD) - patron saint of Ireland
- Joseph Paxton (1803 - 1865) - Victorian architect, creator of the Crystal Palace
- Sir Robert Peel (1788 - 1850) - Victorian Tory prime minister, created the Metropolitan Police
- Samuel Pepys (1633 - 1703) - 17th century diarist
- Philippe Pétain (1856 - 1951) - French general, leader of the Vichy collaborationist government
- - Duke of Edinburgh, husband of Queen Elizabeth II
- Pablo Picasso (1881-1973) - 20th Century Spanish artist
- Pitt the Younger (1759 - 1806) - prime minister during the Napoleonic Wars
- Pliny the Younger (c.61 AD - c.112 AD) - ancient Roman administrator, writer
- Marco Polo (c.1254 - 1324) - 13th century Venetian explorer of China
- Pol Pot (1925-1998) - 20th century Cambodian communist leader, architect of genocide
- The Princes in the Tower - sons of Edward IV, probably murdered
- Pythagoras (c.580 BC - c.500 BC) - ancient Greek scientist, mathematician