- Saar, Louis Victor Franz
- Sachs, Curt
- Saint-Saëns, Charles Camille
- Salas, Francisco
- Salieri, Antonio
- Salter, Mary Elizabeth Turner
- Sanderson, Winfred
- Sanz, Manuel
- Sarro / Sarri, Domenico
- Sarti, Giuseppe
- Sartorio, Antonio
- Satie, Erik
- Savioni, Mario
- Scarlatti, Alessandro
- Scarlatti, Domenico
- Schäffer, Julius
- Scherzer, Otto
- Schlesinger, Sebastian Benson
- Schlösser, Adolphe
- Schmid, J.
- Schmitt, Florent
- Schoeck, Othmar
- Schoenberg, Arnold Franz Walter
- Schreker, Franz
- Schröter, Corona
- Schubert, Franz Peter
- Schuman, William Howard
- Schumann, Clara Wieck
- Schumann, Robert Alexander
- Schwarz-Schilling, Reinhard
- Schweizer, Richard
- Scott, Cyril Meir
- Scott, John Prindle
- Seckendorff, Karl Sigmund
- Seelig, Paul
- Senfl, Ludwig
- Serrano y Ruiz, Emilio
- Serrano, José
- Sgambati, Giovanni
- Shapleigh, Bertram
- Shaw, Martin Edward Fallas
- Shield, William
- Sibelius, Jean
- Siebert, Ferdinand
- Siegmeister, Elie
- Silcher, Philipp Friedrich
- Sinding, Christian
- Sjögren, Johan Gustaf Emil
- Smalley, Roger
- Smith, John Christopher
- Smith, John Stafford
- Smith, Wilson George
- Sobejano y Ayala, José
- Sokolov, Nikolay Aleksandrovich
- Somervell, Sir Arthur
- Sommer, Hans
- Sor, Fernando
- Sorabji, Kaikhosru
- Soriano Fuertes, Mariano
- Soriano, Agustín Pérez
- Sousa, John Philip
- Speaks, Oley
- Spiering, Theodor
- Spohr, Louis (Ludwig)
- Spontini, Gaspare
- Squire, William Henry
- Stainer, John
- Stanford, Sir Charles Villiers
- Stange, Max
- Starcke, O.
- Steele, Douglas
- Steffani, Agostino
- Stephens, Ward
- Stevens, Halsey
- Stevens, R. J. S.
- Stevenson, John Andrew
- Stickles, William
- Still, Robert
- Stolz, Adolf
- Stölzel, Gottfried Heinrich
- Storace, Stephen
- Stradella, Alessandro
- Straus, Oscar Nathan
- Strauss II, Johann
- Strauss, Richard
- Stravinsky, Igor
- Streicher, Theodor
- Streitmann, Carl
- Strickland, Lily
- Strozzi, Barbara
- Stucken, Frank Valentine van der
- Sullivan, Sir Arthur
- Supriani, Francesco
- Szulc, Jósef
