| Charles Jackson Paine | August 26, 1833 - August 12, 1916 |
| Eleazer Arthur Paine | September 10, 1815 - December 16, 1882 |
| Halbert Eleazer Paine | February 4, 1826 - April 14, 1905 |
| Innis Newton Palmer | March 30, 1824 - September 9, 1900 |
| John McCauley Palmer | September 13, 1817 - September 25, 1900 |
| John Grubb Parke | September 22, 1827 - December 16, 1900 |
| Lewis Baldwin Parsons | April 5, 1818 - March 16, 1907 |
| Marsena Rudolph Patrick | March 11, 1811 - July 27, 1888 |
| Francis Engle Patterson | May 7, 1821 - November 22, 1862 |
| Gabriel Rene Paul | March 22, 1813 - May 5, 1886 |
| John James Peck | January 4, 1821 - April 21, 1878 |
| Galusha Pennypacker | June 1, 1844 - October 1, 1916 |
| William Henry Penrose | March 10, 1832 - August 29, 1903 |
| John Smith Phelps | December 22, 1814 - November 20, 1886 |
| John Wolcott Phelps | November 13, 1813 - February 2, 1885 |
| Abram Sanders Piatt | May 2, 1821 - March 16, 1908 |
| Byron Root Pierce | September 20, 1829 - July 10, 1924 |
| William Anderson Pile | February 11, 1829 - July 7, 1889 |
| William Anderson Pitcher | October 23, 1824 - October 21, 1895 |
| Alfred Pleasonton | July 7, 1824 - February 17, 1897 |
| Joseph Bennett Plummer | November 15, 1816 - August 9, 1862 |
| Orlando Metcalfe Poe | March 7, 1832 - October 2, 1895 |
| John Pope | March 16, 1822 - September 23, 1892 |
| Andrew Porder | July 10, 1820 - January 3, 1872 |
| Fitz John Porter | August 31, 1822 - May 21, 1901 |
| Edward Elmer Potter | June 21, 1823 - June 1, 1889 |
| Joseph Haydn Potter | October 12, 1822 - December 1, 1892 |
| Robert Brown Potter | July 16, 1829 - February 19, 1887 |
| Benjamin Franklin Potts | January 29, 1836 - June 17, 1887 |
| William Henry Powell | May 10, 1825 - December 26, 1904 |
| Calvin Edward Pratt | January 23, 1828 - August 3, 1896 |
| Benjamin Mayberry Prentiss | November 23, 1819 - February 8, 1901 |
| Henry Prince | June 19, 1811 - August 19, 1892 |
