| Charles Felton Pidgin | 1844–1923 | 2 |
| F. F. (Filippus Fourie) Pienaar | 1877–1948 | 1 |
| Arthur Stanwood Pier | 1874–1966 | 1 |
| Franklin Pierce | 1804–1869 | 1 |
| H. Winthrop (Herman Winthrop) Pierce | born 1850 | — |
| Henry Niles Pierce | 1820–1899 | 1 |
| Ray Vaughn Pierce | 1840–1914 | 1 |
| Charles W. (Charles Wheeler) Pierson | 1864–1934 | 1 |
| G. W. Septimus (George William Septimus) Piesse | 1820–1882 | 1 |
| Harold Piffard | 1867–1938 | 4 |
| Albert Pike | 1809–1891 | 1 |
| H. Lee M. (Henry Lee Mitchell) Pike | born 1865 | 1 |
| James Constantine Pilling | 1846–1895 | 1 |
| Boris Pilniak | 1894–1937 | 1 |
| Alberto Pimentel | 1849–1925 | 1 |
| Rui de Pina | 1440–1521 | 7 |
| Theophilus G. (Theophilus Goldridge) Pinches | 1856–1934 | 1 |
| Gifford Pinchot | 1865–1946 | 1 |
| Frank Woodworth Pine | born 1869 | 1 |
| Bartolomeo Pinelli | 1781–1835 | 1 |
| Arthur Wing Pinero | 1855–1934 | 5 |
| Allan Pinkerton | 1819–1884 | 3 |
| John Pinkerton | 1758–1826 | 1 |
| Percy Pinkerton | 1855–1946 | 2 |
| lieutenant-colonel (Ninian) Pinkney | 1776–1825 | 1 |
| William Pinnock | 1782–1843 | 1 |
| Alexandre Alberto da Rocha de Serpa Pinto | 1846–1900 | 2 |
| José Nicolau de Massuelos Pinto | 1770–1825 | 1 |
| Hester Lynch Piozzi | 1741–1821 | 3 |
| H. Beam Piper | 1904–1964 | 36 |
| Andres Piquer | 1711–1772 | 1 |
| Luigi Pirandello | 1867–1936 | 2 |
| Ernesto Pires | 1857–1884 | 1 |
| Tommaso Piroli | 1752–1824 | 6 |
| James Hall Pitman | born 1896 | 1 |
| Norman Hinsdale Pitman | 1876–1925 | 1 |
| Olga de Pitray | 1835–1920 | 2 |
| Lemuel Arthur Pittenger | 1873–1953 | 1 |
| William Pittenger | 1840–1904 | 3 |
| John Linwood Pitts | 1836–1917 | 1 |
| Sol. T. (Solomon Tshekisho) Plaatje | 1876–1932 | 1 |
| Pierre-Paul Plan | 1870–1951 | 1 |
| Claudi Planas i Font | 1869–1931 | 1 |
| Joseph Planta | 1744–1827 | 1 |
| Rutherford Hayes Platt | 1894–1975 | 1 |
| William Playfair | 1759–1823 | 1 |
| Henry R. (Henry Robert) Plomer | 1856–1928 | 1 |
| Simon Plouffe | born 1956 | 5 |
| Plunkett, Horace Curzon, Sir | 1854–1932 | 1 |
| George Washington Plunkitt | 1842–1924 | 1 |
| Pascual Hicaro Poblete | 1857–1921 | 2 |
| Jerome Podwil | born 1938 | 1 |
| Edgar Allan Poe | 1809–1849 | 21 |
| Willy Pogány | 1882–1955 | 3 |
| Frederik Pohl | 1919–2013 | 1 |
| Rudolf Pohl | born 1879 | 1 |
| Henri Poincaré | 1854–1912 | 1 |
| Lucien Poincaré | 1862–1920 | 1 |
| John William Polidori | 1795–1821 | 1 |
| James K. (James Knox) Polk | 1795–1849 | 1 |
| Elise Polko | 1823–1899 | 1 |
| A. F. (Albert Frederick) Pollard | 1869–1948 | 3 |
| Alfred W. (Alfred William) Pollard | 1859–1944 | 4 |
| Walter Herries Pollock | 1850–1926 | 1 |
| Marco Polo | 1254–1324 | 2 |
| Rietrik Polén | 1823–1884 | 1 |
| John Pomfret | 1667–1702 | 1 |
| Edouard de Pompery | 1812–1895 | 1 |
| Pompignan, Jean-Jacques Lefranc, marquis de | 1709–1784 | 1 |
| A. J. Pons | 1829–1884 | 1 |
| Ponson du Terrail | 1829–1871 | 5 |
| Bertram W. H. (Bertram William Henry) Poole | 1880–1957 | 1 |
| Ernest Poole | 1880–1950 | 2 |
| Reginald Lane Poole | 1857–1939 | 2 |
| William Frederick Poole | 1821–1894 | 1 |
| Benjamin Perley Poore | 1820–1887 | 1 |
| Alexander Pope | 1688–1744 | 9 |
| Hugh Pope | 1869–1946 | 1 |
| R. Martin (Robert Martin) Pope | 1865–1944 | 1 |
| Saxton T. (Saxton Temple) Pope | 1875–1926 | 1 |