- Nevin, George Balch
- Nicholl, Horace Wadham
- Nicolai, Otto
- Niedermeyer, Louis
- Nieto, Manuel
- Niles, John Jacob
- Nin y Castellanos, Joaquín
- Nin-Culmell, Joaquín
- Nodnagel, Ernst Otto
- Nössler, Eduard
- Núñez-Robres, Lázaro
- Nürnberg, Hermann
- O’Hara, Geoffrey
- Obiols-Tramullas, Mariano
- Obradors, Fernando J.
- Ochs, Siegfried
- Offenbach, Jacques
- Orff, Carl
- Orlandini, Giuseppe Maria
- Orr, Charles Wilfred
- Ortega, Francisco
- Orthel, Léon
- Osma, Julio de
- Otterström, Thorvald
- Oudrid y Segura, Cristóbal
- 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
- Quagliati, Paolo
- Quilter, Roger
- Radecke, Albert Maria Robert
- Raff, Joseph Joachim
- Rameau, Jean-Philippe
- Rauzzini, Venanzio
- Ravel, Maurice
- Reber, Henri
- Reger, Max
- Reichardt, Johann Friedrich
- Reichardt, Luise
- Reimann, Aribert
- Reimann, Heinrich
- Reinecke, Karl Heinrich Carsten
- Reisenauer, Alfred
- Reissiger, Karl Gottlieb
- Reparaz, Antonio
