- Paderewski, Ignacy Jan
- Padilla, José Mariano
- Paër, Ferdinando
- Paine, John Knowles
- Paisiello, Giovanni
- Paladilhe, Émile
- Palomino, José
- Palomo, Lorenzo
- Panizza, Ettore
- Panofka, Heinrich
- Panschenko, Semyon Viktorovich
- Paradies, Pietro Domenico
- Parisotti, Alessandro
- Parke, Dorothy
- Parker, Horatio William
- Parry, Charles Hubert Hastings
- Pasatieri, Thomas
- Pasquini, Bernardo
- Payne, John Howard
- Paz, Narciso
- Pedrell Sabaté, Felipe
- Peel, Graham
- Pepping, Ernst
- Pergolesi, Giovanni Battista
- Peri, Jacopo
- Persichetti, Vincent
- Perti, Giacomo Antonio
- Pessard, Émile
- Pfitzner, Hans Erich
- Phillips, Montague Fawcett
- Piccinni, Niccolò
- Pick-Mangiagalli, Riccardo
- Pierné, Gabriel
- Pignatta, Giuseppe
- Pilkington, Francis
- Pilz, Karl Philipp Emanuel
- Pinkham, Daniel Rogers
- Pinsuti, Ciro
- Pisádor, Diego
- Pizzetti, Ildebrando
- Pla, Manuel
- Platz, Wilhelm
- Poldowski, née Wieniawski, Irena Regina
- Ponce, Manuel M.
- Ponchielli, Amilcare
- Poniatowski, Count Giuseppe Luci
- Popper, David
- Porpora, Nicolo
- Poulenc, Francis
- Praetorius, Michael
- Prehl, Paul
- Pressel, Gustav
- Proch, Heinrich
- Provenzale, Francesco
- Puccini, Giacomo
- Puget, Loïsa
- Puget, Paul
- Purcell, Henry
