| Name | Nationality | Period | Tunes |
|---|
| Pacheco, José |  | 1784–1865 | 1 |
| Pachelbel, Johann |  | 1653–1706 | 3 |
| Paddon, John |  | 1775–1846 | 1 |
| Paganini, Niccolò |  | 1782–1840 | 9 |
| Paisiello, Giovanni | | 1740–1816 | 3 |
| Paradisi, Pietro Domenico | | 1707–1791 | 1 |
| Parisotti, Alessandro | | 1853–1913 | 1 |
| Parry, Hubert |  | 1848–1918 | 1 |
| Perfect, Albert | | 1873–1945 | 1 |
| Pergolesi, Giovanni Battista | | 1710–1736 | 5 |
| Pessard, Emile |  | 1843–1917 | 2 |
| Peters, Brian | | ?— | 1 |
| Petrie, Henry W. | | 1857–1925 | 1 |
| Pettit, Mildred Tanner | | 1895–1977 | 1 |
| Petzold, Christian | | 1677–1733 | 2 |
| Phile, Philip | | 1734–1793 | 1 |
| Phillips, Thomas | | 1774–1841 | 1 |
| Piefke, Johann Gottfried | | 1817–1884 | 1 |
| Pierpont, James Lord | | 1822–1893 | 1 |
| Pietrasanta, Gian Marco | | ?— | 1 |
| Platti, Giovanni | | 1690–1763 | 5 |
| Ponchielli, Amilcare | | 1834–1886 | 1 |
| Pope, Peter |  | 1944— | 9 |
| Popp, Wilhelm | | 1828–1903 | 3 |
| Popper, David |  | 1843–1913 | 1 |
| Poulton, George R. | | 1828–1876 | 1 |
| Praetorius, Michael | | 1571–1621 | 5 |
| Presley, Elvis | | 1935–1977 | 1 |
| Prichard, Rowland | | 1811–1887 | 1 |
| Prill, Emil | | 1867–1940 | 79 |
| Pryor, Arthur | | 1869–1942 | 1 |
| Puccini, Giacomo | | 1858–1924 | 5 |
| Purcell, Henry | | 1659–1695 | 12 |
| Purdy, William T. | | 1882–1918 | 1 |