| Gattung | Titel | Komponist | Komponiert |
| Oper | Sadko [Садко] | Nikolai Andrejewitsch Rimski-Korsakow | 1893-96 |
| Oper | Salomé | Antoine Mariotte | 1908 |
| Oper | Samson and Delilah | Camille Saint-Saëns | 1868-77 |
| Oper | Samson et Dalila | Camille Saint-Saëns | 1868-77 |
| Oper | Samson und Dalila | Camille Saint-Saëns | 1868-77 |
| Oper | Sancha von Kastilien | Gaetano Donizetti | 1832 |
| Oper | Sancia di Castiglia | Gaetano Donizetti | 1832 |
| Oper | Sapho | Charles François Gounod | 1850-51, rev. 1884 |
| Oper | Sappho | Charles François Gounod | 1850-51, rev. 1884 |
| Oper | Sardakai oder Das kommt davon | Ernst Krenek | 1967-69, rev. 1971 |
| Oper | Sarema, die Rose vom Kaukasus | Alexander von Zemlinsky | 1894-95 |
| Oper | Sarema, la rose du Caucase | Alexander von Zemlinsky | 1894-95 |
| Oper | Šárka | Leoš Janáček | 1887/88, rev. 1918/19, rev. 1924/25 |
| Oper | Šarlatán | Pavel Haas | 1934-37 |
| Oper | Saul and David | Carl Nielsen | 1898-1901 |
| Oper | Saul et David | Carl Nielsen | 1898-1901 |
| Oper | Saul og David | Carl Nielsen | 1898-1901 |
| Oper | Saul und David | Carl Nielsen | 1898-1901 |
| Oper | Savitri | Gustav Holst | 1908-09 |
| Oper | Sāvitri | Gustav Holst | 1908-09 |
| Oper | Scharlatan | Pavel Haas | 1934-37 |
| Bühnenmusik | Schluck und Jau | Leoš Janáček | 1928 |
| Oper | Schneeflöckchen | Nikolai Andrejewitsch Rimski-Korsakow | 1880-81 |
| Oper | Schuld und Sühne | Emil Petrovics | 1967-68 |
| Oper | Schwanda, der Dudelsackpfeifer | Jaromír Weinberger | 1927 |
| Oper | Schwanda the Bagpiper | Jaromír Weinberger | 1927 |
| Operette | Schwarzwaldmädel | Leon Jessel | 1917 |
| Oper | Schwester Angelica | Giacomo Puccini | 1917, rev. 1918 |
| Oper | Scipio's Dream | Wolfgang Amadeus Mozart | 1772 |
| Oper | Scipios Traum | Wolfgang Amadeus Mozart | 1772 |
| Oper | Scylla et Glaucus | Jean-Marie Leclair d.Ä. | 1746, rev. 1755 |
| Oper | Seelewig | Sigmund Theophil Staden | 1644 |
| Oper | Šelma sedlák | Antonín Dvořák | 1877? |
| Oper | Semirama | Ottorino Respighi | 1908-10 |
| Oper | Semirâma | Ottorino Respighi | 1908-10 |
| Oper | Semiramide | Gioacchino Rossini | 1823 |
| Oper | Semiramis | Ottorino Respighi | 1908-10 |
| Oper | Sémiramis | Gioacchino Rossini | 1823 |
| Oper | Semjon Kotko [Семён Котко] | Sergei Sergejewitsch Prokofjew | 1938-39 |
| Oper | Semyon Kotko | Sergei Sergejewitsch Prokofjew | 1938-39 |
| Oper | Servilia | Nikolai Andrejewitsch Rimski-Korsakow | 1900-01 |
| Oper | Servilya | Nikolai Andrejewitsch Rimski-Korsakow | 1900-01 |
| Oper | Serwilija [Сервилия] | Nikolai Andrejewitsch Rimski-Korsakow | 1900-01 |
| Oper | Sesostri, re d'Egitto | Domingo Terradellas | 1751 |
| Oper | Sesostris, König von Ägypten | Domingo Terradellas | 1751 |
| Oper | Siberia | Umberto Giordano | 1901-03, rev. 1927 |
| Oper | Sibirien | Umberto Giordano | 1901-03, rev. 1927 |
| Oper | Siegesmund | Gioacchino Rossini | 1814 |
| Oper | Siegfried | Richard Wagner | 1851-71 |
| Oper | Sigismondo | Gioacchino Rossini | 1814 |
| Oper | Signor Bruschino, or The Accidental Son | Gioacchino Rossini | 1812 |
| Oper | Signor Bruschino oder Der Sohn aus Zufall | Gioacchino Rossini | 1812 |
| Oper | Signor Bruschino ou Le Fils par hasard | Gioacchino Rossini | 1812 |
| Oper | Sigurd | Ernest Reyer | 1883/84 |
| Bühnenmusik | Sigurd, der Kreuzfahrer | Edvard Grieg | 1872 |
| Bühnenmusik | Sigurd Jorsalfar | Edvard Grieg | 1872 |
| Oper | Si j'étais roi | Charles Adolphe Adam | 1852 |
| Oper | Simon Boccanegra | Giuseppe Verdi | 1857, rev. 18xx |
| Oper | Sim Tjong | Isang Yun | 1971-72 |
| Operette | Sissi | Fritz Kreisler | 1932 |
| Operette | Sissy | Fritz Kreisler | 1932 |
| Oper | Sister Angelica | Giacomo Puccini | 1917, rev. 1918 |
| Oper | Sizilianische Bauernehre | Pietro Mascagni | 1890 |
| Oper | Skasanije o newidimom grade Kitesche i dewe Fewronii [Сказание о невидимом граде Китеже и деве Февронии] | Nikolai Andrejewitsch Rimski-Korsakow | 1903-04 |
| Oper | Skaska o zare Saltane [Сказка о царе Салтане] | Nikolai Andrejewitsch Rimski-Korsakow | 1899-1900 |
| Oper | Smrt Hippodamie | Zdeněk Fibich | 1891 |
| Oper | Snegurotschka [Снегурочка] | Nikolai Andrejewitsch Rimski-Korsakow | 1880-81 |
| Oper | Sniegourotchka | Nikolai Andrejewitsch Rimski-Korsakow | 1880-81 |
| Oper | Snowmaiden | Nikolai Andrejewitsch Rimski-Korsakow | 1880-81 |
| Oper | Sœur Angelica | Giacomo Puccini | 1917, rev. 1918 |
| Oper | Sofonisba | Ferdinando Paër | 1805 |
| Oper | Sokol [Сокол] | Dmitri Stepanowitsch Bortnjanski | 1786 |
| Oper | Solotoi petuschok [Золотой петушок] | Nikolai Andrejewitsch Rimski-Korsakow | 1906-07 |
| Oper | Solowja [Соловья] | Igor Fjodorowitsch Strawinski | 1908-14 |
| Oper | So machen es alle Frauen | Wolfgang Amadeus Mozart | 1789/90 |
| Oper | Sonnenflammen | Siegfried Wagner | 1912 |
| Oper | Soraya von Granada | Gaetano Donizetti | 1821, rev. 1823 |
| Oper | Sorotschinskaja jarmarka [Сорочинская ярмарка] | Modest Petrowitsch Mussorgski | 1874-80 |
| Oper | Sosarme, König von Medien | Georg Friedrich Händel | 1731-32 |
| Oper | Sosarme, Re di Media | Georg Friedrich Händel | 1731-32 |
| Oper | Sosarme, Roi de Mèdes | Georg Friedrich Händel | 1731-32 |
| Oper | Sosarmes, King of Medes | Georg Friedrich Händel | 1731-32 |
| Musical | South Pacific | Richard Charles Rodgers | 1949 |
| Oper | Spartaco | Giuseppe Porsile | 1726 |
| Oper | Spartakus | Giuseppe Porsile | 1726 |
| Oper | Spinning Room | Zoltán Kodály | 1924-32 |
| Oper | Spring Night | Gerhard Rosenkrone Schjelderup | 1905 |
| Oper | Stella di Napoli | Giovanni Pacini | 1845 |
| Oper | Stiffelio | Giuseppe Verdi | ? |
| Oper | Strandrecht | Ethel Smyth | 1906 |
| Oper | Straßenalltag | Kurt Weill | 1946 |
| Oper | Straszny Dwór | Stanisław Moniuszko | 1861-64 |
| Oper | Stratonice | Étienne-Nicolas Méhul | 1790-92 |
| Oper | Stratonike | Étienne-Nicolas Méhul | 1790-92 |
| Oper | Street Scene | Kurt Weill | 1946 |
| Oper | Suor Angelica | Giacomo Puccini | 1917, rev. 1918 |
| Oper | Švanda dudák | Jaromír Weinberger | 1927 |
| Oper | Székely fonó | Zoltán Kodály | 1924-32 |