- Pacini, Émilien
- Pacory, Henry
- Paderewski, Ignacy Jan
- Padilla, José Mariano
- Paër, Ferdinando
- Pagans, Lorenzo
- Pagliara, Rocco Emanuele
- Pailleron, Édouard Jules Henri
- Paine, John Knowles
- Paisiello, Giovanni
- Palacio, Manuel del
- Palacios, Miguel de
- Paladilhe, Émile
- Palazzi, Giovanni
- Palomba, Giuseppe
- Palomino, José
- Palomo, Lorenzo
- Pamphilj (Pamphili), Benedetto
- Panizza, Ettore
- Panofka, Heinrich
- Panschenko, Semyon Viktorovich
- Panzacchi, Enrico
- Paradies, Pietro Domenico
- Pariati, Pietro
- Parini, Giuseppe
- Parisotti, Alessandro
- Parke, Dorothy
- Parker, Horatio William
- Parnasso, Felice
- Parny, Évariste de
- Parry, Charles Hubert Hastings
- Pasatieri, Thomas
- Pascoli, Giovanni
- Pascual Frutos, Luís
- Paso y Cano, Antonio
- Pasquini, Bernardo
- Paté, Lucien
- Payne, John Howard
- Paz, Narciso
- Pears, Peter
- Pedrell Sabaté, Felipe
- Peel, Graham
- Pellegrin, Simon-Joseph
- Penmarch, Gustave de
- Pepoli, Carlo
- Pepping, Ernst
- Peral, Juan del
- Pérez Escrich, Enrique
- Pérez y González, Felipe
- Pergolesi, Giovanni Battista
- Peri, Jacopo
- Periquet Zuaznábar, Fernando
- Perrín, Guillermo
- Persichetti, Vincent
- Perti, Giacomo Antonio
- Pesci, Ugo
- Pessard, Émile
- Petrarca, Francesco
- Petrosellini, Giuseppe
- Peyre, Louis de
- Pfarrius, Gustav
- Pfeil, Heinrich
- Pfitzner, Hans Erich
- Phillips, Montague Fawcett
- Phillips, Norah
- Piave, Francesco Maria
- Picander (Christian Friedrich Henrici)
- Piccinni, Joseph Marie
- Piccinni, Niccolò
- Pick-Mangiagalli, Riccardo
- Pierné, Gabriel
- Pignatta, Giuseppe
- Pilkington, Francis
- Pilz, Karl Philipp Emanuel
- Pina Domínguez, Mariano
- Pindemonte, Ippolito
- Pinkham, Daniel Rogers
- Pinsuti, Ciro
- Piovene, Agostino
- Pisádor, Diego
- Pistoia, Cino da
- Pizzetti, Ildebrando
- Pla, Manuel
- Platen-Hallermünde, August von
- Plattner, Anton
- Platz, Wilhelm
- Poe, Edgar Allan
- Poldowski, née Wieniawski, Irena Regina
- Pollack, Aaron
- Polo de Medina, Salvador Jacinto
- Pomey, Louis
- Pompilj, Vittoria Aganoor
- Ponce, Juan
- Ponce, Manuel M.
- Ponchielli, Amilcare
- Poniatowski, Count Giuseppe Luci
- Pope, Alexander
- Popper, David
- Porpora, Nicolo
- Poulenc, Francis
