| Polycarp | Christian bishop of Smyrna | 69–155 |
| Carl Pomerance | American mathematician | 1944 |
| John Pomeroy | animator | 1951 |
| John Pomfret | English poet | 1667–1702 |
| Madame de Pompadour | chief mistress of Louis XV of… | 1721–1764 |
| Mike Pompeo | 70th United States Secretary … | 1963 |
| Pompey | Roman general | -106–-48 BC |
| Enrique Jardiel Poncela | Spanish dramatist | 1902–1952 |
| Catherine Ponder | American priest | 1927 |
| Arthur Ponsonby | British Liberal and later Lab… | 1871–1946 |
| John du Pont | American heir to the Du Pont … | 1938–2010 |
| Marcos Pontes | Brazilian astronaut | 1963 |
| Evagrius Ponticus | Christian monk | 345–399 |
| Chris Pontius | American actor | 1974 |
| Ithiel de Sola Pool | American social scientist | 1917–1984 |
| Christopher Poole | American Internet entrepreneu… | 1988 |
| John Poole | | |
| William Poole | | |
| Iggy Pop | American rock singer-songwrit… | 1947 |
| Alexander Pope | eighteenth century English po… | 1688–1744 |
| John Pople | Nobel prize winning British c… | 1925–2004 |
| Lyubov Popova | Russian artist | 1889–1924 |
| Mary Poppendieck | | |
| Frank Popper | French art historian | 1918 |
| Karl Popper | Austrian-British philosopher … | 1902–1994 |
| Antonio Porchia | Italian Argentinian poet | 1885–1968 |
| Petro Poroshenko | Ukrainian businessman and pol… | 1965 |
| Jerry I. Porras | American writer | 1938 |
| Genesis P-Orridge | British musician and writer | 1950 |
| Ferdinand Porsche | German automobile designer | 1875–1951 |
| Richard Porson | British classical scholar | 1759–1808 |
| Anna Porter | | |
| Cole Porter | American composer and songwri… | 1891–1964 |
| David Dixon Porter | United States Navy admiral | 1813–1891 |
| Eleanor H. Porter | American novelist | 1868–1920 |
| George Porter | British chemist | 1920–2002 |
| Jane Porter | Scottish historical novelist,… | 1776–1850 |
| Katherine Anne Porter | American journalist, essayist… | 1890–1980 |
| MacKenzie Porter | Canadian actress, singer and … | 1990 |
| Michael E. Porter | American engineer and economi… | 1947 |
| Noah Porter | American academic | 1811–1892 |
| Peter Porter | British poet | 1929–2010 |
| Roy Porter | British historian | 1946–2002 |
| Beilby Porteus | Bishop of Chester; Bishop of … | 1731–1809 |
| Michael Portillo | British politician turned tel… | 1953 |
| Estela Portillo-Trambley | American writer | 1936–1998 |
| Charles Portis | American actor | 1933 |
| Frank Portman | American musician | 1964 |
| Natalie Portman | Israeli-American actress | 1981 |
| J. Posadas | Argentine Trotskyist (1912-19… | 1912–1981 |
| Posidonius | ancient greek philosopher | -135–-51 BC |
| Richard A. Posner | United States federal judge | 1939 |
| Emily Post | American etiquette expert | 1872–1960 |
| Laurens van der Post | South African writer | 1906–1996 |
| Jon Postel | American computer scientist | 1943–1998 |
| Nate Postlethwait | | |
| Neil Postman | American writer and academic | 1931–2003 |
| Pol Pot | former General Secretary of t… | 1925–1998 |
| Franka Potente | German actress and singer | 1974 |
| Chaim Potok | American rabbi | 1929–2002 |
| Beatrix Potter | English children's writer and… | 1866–1943 |
| Dennis Potter | English television dramatist,… | 1935–1994 |
| Henry Codman Potter | Bishop of the Episcopal Dioce… | 1835–1908 |
| Louis de Potter | pamphleteer, politician (1786… | 1786–1859 |
| Stephen Potter | British writer | 1900–1969 |
| Will Potter | American journalist | 1980 |
| Eugène Edine Pottier | French politician | 1816–1887 |
| Robert Potts | | |
| Rolf Potts | American writer | 1970 |
| Luis Lacalle Pou | 42nd and current president of… | 1973 |
| Ezra Pound | American Imagist poet and cri… | 1885–1972 |
| Paula Poundstone | American comedian | 1959 |
| William Poundstone | American writer | 1955 |
| Mostafa Pour-Mohammadi | Iranian politician | 1960 |
| Jerry Pournelle | American science fiction writ… | 1933–2017 |
| Dan Povenmire | American television director,… | 1963 |
| Terence V. Powderly | American mayor | 1849–1924 |
| B. W. Powe | Canadian writer | 1955 |
| Elizabeth Willing Powel | American socialite and women … | 1743–1830 |
| Anthony Powell | English novelist | 1905–2000 |
| Colin Powell | Former U.S. Secretary of Stat… | 1937 |
| Dawn Powell | American writer | 1896–1965 |
| Enoch Powell | British politician | 1912–1998 |
| Frederick York Powell | British historian | 1850–1904 |
| George Henry Powell | songwriter | 1880–1951 |
| Jena Powell | American politician | 1993 |
| John Powell | American Jesuit priest | 1645–1713 |
| Julie Powell | American blogger | 1973 |
| Michael Powell | English film director | 1905–1990 |
| Robert Powell | English television and film a… | 1944 |
| Walter W. Powell | American sociologist | 1948 |
| Cat Power | American singer-songwriter an… | 1972 |
| Samantha Power | Irish-American academic, auth… | 1970 |
| Harold Powers | American academic | 1928–2007 |
| J. F. Powers | American writer | 1917–1999 |
| Richard Powers | novelist | 1957 |
| Tim Powers | American writer | 1952 |
| John Cowper Powys | British writer, lecturer and … | 1872–1963 |
| John Henry Poynting | physicist | 1852–1914 |
| Stanislav Pozdniakov | Russian fencer | 1973 |
