- Saariaho, Kaija
- Safir, Rachid
- Sahl, Michael
- Sainct Laurens
- Saint-Amand, Pierre
- Saint-Denis, Anne
- Saint-Denis, Patrick
- Saint-Denys Garneau, Hector de
- Saint-Gelais, Hughes
- Saint-Gelais, Joseph
- Saint-Saëns, Camille
- Sallafranque, Yan
- Salonen, Esa-Pekka
- Salus, Hugo
- Salvador, Matilde
- Sánchez-Gutiérrez, Carlos
- Sarreau, Barbara
- Sarvig, Ole
- Sas, Ewa
- Satie, Érik
- Saunders, Shari
- Sauvage, Danielle
- Sauvé, Martial
- Savage, Danielle
- Savoie, Geneviève
- Savouret, Alain
- Sæther, Harald
- Scelsi, Giacinto
- Schafer, R Murray
- Scherchen, Tona
- Schikaneder, Emanuel
- Schmithüsen, Ingrid
- Schmitt, Markus
- Schnarr, Jasmine
- Schneider, Jean-Fabien
- Schneller, Oliver
- Schnittke, Alfred
- Schoenberg, Arnold
- Schrey, Michiel
- Schuback, Peter
- Schubert, Franz Peter
- Schubert, Peter
- Schubring, Julius
- Schulich Ensemble
- Schulich Saxophone Ensemble
- Schulich School Singers
- Schulich String Quartet
- Schuller, Gunther
- Schumacher, Marlon
- Schumann, Robert
- Schweizer, Manuel
- Schwitters, Kurt
- Sciarrino, Salvatore
- Scott, Ryan
- Scriabine, Alexandre
- Sebastián, Maitane
- Séguin, Caroline
- Selmi, Jean-Christophe
- Serraz, David
- Seta, Michal
- Seter, Mordechai
- Settel, Zack
- Sévigny, Annik
- Shakespeare, William
- Shalabi, Sam
- Shanghai Symphony Orchestra
- Sharifi, Jamshied
- Sharkya’, Vergil
- Sharman, Rodney
- Sheets, Zach
- Shelley, Alexander
- Sheppard, Meg
- Shi, Fuhong
- Shinohara, Makoto
- Shooner, Anik
- Shostakovich, Dmitri
- Sibelius, Jean
- Siddall, Jon
- Sigal, Rodrigo
- Sigesmund, Darren
- Sikora, Elżbieta
- Simard, Guillaume
- Simard, Marie Josée
- Simard, Matthieu
- Simard, Pierre
- Simard-Galdès, Magali
- Simonis, Jean-Marie
- Simons, Mark
- Šimurdová, Zuzana
- Sinti, I Wayan
- Siot, Jérémie
- Sirois, Carole
- Six voix solistes
- Sixtrum
- Skull, Colleen
- Slapcoff, Robert
- Slean, Sarah
- Sloat, Kathryn
- Smalley, Denis
- Smetana, Bedřich
- Smith, Linda Catlin
- Smith, Michel A
- Smythe, Cory
- Société de musique contemporaine du Québec (SMCQ)
- Sodeika, Gintaras
- Söderström, Elin
- Sohal, Naresh
- Sokolović, Ana
- Solal, Gaëlle
- Soli-Tutti
- Solistes de Lyon
- solistes des chœurs de l’ORTF, Les
- Soly, Geneviève
- Somers, Harry
- Sondheim, Stephen
- Song, Wonny
- Sonstevold, Gunnar
- Sosa, Raoul
- Souster, Tim
- Southam, Ann
- Sørensen, Bent
- Sørlie, Stine
- Sparnaay, Harry
- Spicer, Virginia
- Spiteri, Vivienne
- St John, Lara
- St-Arnaud, Francis
- St-Hilaire, Frédéric
- St-Jean, François
- St-Onge, Alexandre
- St-Onge, Antoine
- St-Pierre, Aude
- Stahnke, Manfred
- Staier, Andreas
- Stalvey, Dorrance
- Standing Wave
- Staniland, Andrew
- Stark, Bruce
- Stec, Andrzej
- Steen-Andersen, Simon
- Steenhuisen, Paul
- Steeves, Tim
- Steffler, Paul
- Stenhammar, Wilhelm
- Steven, Donald
- Stevenson, Robert W
- Stewart, D Andrew
- Stibilj, Milan
- Stockhausen, Karlheinz
- Stoll, Magali
- Stonehouse, Jeffrey
- Straesser, Joep
- Straffelini, Nicola
- Strauss, Axel
- Strauss, Richard
- Stravinsky, Igor Fyodorovich
- Streatfeild, Simon
- Strizich, Robert
- Studio de musique ancienne de Montréal (SMAM)
- Studio voor Experimentele Muziek
- Subirana, Émile
- Sueyoshi, Yasuo
- Suparta, I Dewa Made
- SuperNova String Quartet
- Sura, Alexandru
- Sutton, Benjamin
- Swift, Daniel
- Swinnen, Peter
- Sylvestre, Alexandre
- Sylvestre, Daniel
- Sylvestre, Gaston
- Sylvestrov, Valentin
- Szabó, Krisztina
- Szlavnics, Chiyoko
