| Paul Popenoe | 1888–1979 | 1 |
| Samuel Pordage | 1633–1691 | 1 |
| Charlotte (Charlotte Endymion) Porter | 1857–1942 | 2 |
| Eleanor H. (Eleanor Hodgman) Porter | 1868–1920 | 12 |
| Jane Porter | 1776–1850 | 2 |
| Allen Wilson Porterfield | 1877–1952 | 2 |
| Charles Johnson Post | 1873–1956 | 1 |
| Emily Post | 1872–1960 | 2 |
| Melville Davisson Post | 1869–1930 | 1 |
| Charles D. (Charles Debrille) Poston | 1825–1902 | 1 |
| I. N. (Ignatii Nicholaevich) Potapenko | 1856–1929 | — |
| E. J. (Everhardus Johannes) Potgieter | 1808–1875 | 1 |
| Alfred Claghorn Potter | 1867–1940 | 1 |
| Austin Potter | 1842–1913 | 1 |
| Beatrix Potter | 1866–1943 | 22 |
| Harry Spafford Potter | 1873–1940 | 2 |
| John Hasloch Potter | 1847–1935 | 1 |
| Margaret Horton Potter | 1881–1911 | 1 |
| Eugenia Dunlap Potts | 1840–1912 | 2 |
| Potts, Thomas, active | 1612–1618 | 1 |
| William Sherman Potts | 1876–1930 | 1 |
| Emilie Poulsson | 1853–1939 | 1 |
| Ezra Pound | 1885–1972 | 2 |
| Francisco Nunes Pousão | born 1830 | 1 |
| Florence Powdermaker | 1894–1966 | 1 |
| Baden Powell | 1796–1860 | 1 |
| E. Alexander (Edward Alexander) Powell | 1879–1957 | 3 |
| John Wesley Powell | 1834–1902 | 7 |
| Effie Power | 1873–1969 | 1 |
| Eileen Power | 1889–1940 | 1 |
| P. (Patrick) Power | 1862–1951 | 3 |
| Philip Bennett Power | 1822–1899 | 1 |
| Tyrone Power | 1797–1841 | 2 |
| George Whitefield Powers | 1834–1903 | 1 |
| Leland Todd Powers | 1857–1920 | 1 |
| Melvin Powers | born 1922 | 1 |
| Paul S. (Paul Sylvester) Powers | 1905–1971 | 1 |
| John Cowper Powys | 1872–1963 | 2 |
| Ernesto Pozzi | 1843–1904 | 1 |
| Praed, Campbell, Mrs. | 1851–1935 | 1 |
| R. Lloyd (Robert Lloyd) Praeger | 1865–1953 | 1 |
| Emilio Praga | 1839–1875 | 1 |
| Marco Praga | 1862–1929 | 1 |
| Ella Farman Pratt | 1837–1907 | 1 |
| comte de Premio-Real | 1840–1888 | 1 |
| Maurice Prendergast | 1858–1924 | 1 |
| E. (Elizabeth) Prentiss | 1818–1878 | 2 |
| George Lewis Prentiss | 1816–1903 | 1 |
| William Hickling Prescott | 1796–1859 | 5 |
| John Presland | 1885–1975 | 1 |
| Thomas Peckett Prest | 1810–1859 | 1 |
| James M. Preston | 1873–1962 | 1 |
| Margaret Junkin Preston | 1820–1897 | 1 |
| May Wilson Preston | 1873–1949 | 4 |
| Frank Prewett | 1893–1962 | — |
| William T. Preyer | 1841–1897 | 1 |
| Edith Ballinger Price | 1897–1997 | 2 |
| George McCready Price | 1870–1963 | 1 |
| Edward Prime-Stevenson | 1858–1942 | 1 |
| Cyrus G. (Cyrus Guernsey) Pringle | 1838–1911 | 1 |
| Edwin John Prittie | 1879–1963 | 1 |
| Edmond Privat | 1889–1962 | 1 |
| Adelaide Anne Procter | 1825–1864 | 3 |
| Richard A. (Richard Anthony) Proctor | 1837–1888 | 3 |
| Raul Sangreman Proença | 1884–1941 | 1 |
| Prothero, Rowland E. (Rowland Edmund), Baron Ernle | 1851–1937 | 2 |
| P.-J. (Pierre-Joseph) Proudhon | 1809–1865 | 2 |
| Marcel Proust | 1871–1922 | 10 |
| Olive Higgins Prouty | 1882–1974 | 1 |
| Prudentius | born 348 | 1 |
| Bolesław Prus | 1847–1912 | 2 |
| abbé Prévost | 1697–1763 | 3 |
| Marcel Prévost | 1862–1941 | 3 |
| Joseph Adams Puffer | 1872–1958 | 1 |
| Mabel Pugh | 1891–1986 | 1 |
| Luigi Pulci | 1432–1484 | 1 |
| Leighton Pullan | 1865–1940 | 1 |
| Andrejs Pumpurs | 1841–1902 | 1 |
| E. R. (Ernest Robertson) Punshon | 1872–1956 | 1 |
| William Morley Punshon | 1824–1881 | 1 |