| Schwarz, Otto | Otto Schwarz | Director | 1927 - 1928 | 3 | |
| Schwitzky, Ernst Bernhard | Ernst Bernhard Schwitzky | Director | 1927 | 1 | |
| Schmith, Iwan | Iwan Schmith | Director | 1932 | 1 | |
| Sax, Sergius | Sergius Sax | Director | 1933 | 9 | |
| Schmitt, Saladin | Saladin Schmitt | Director | 1933 - 1934 | 2 | |
| Schmiedhammer, Dr. | Dr. Schmiedhammer | Director | 1937 | 1 | |
| Scherler, Gerhart | Gerhart Scherler | Director | 1937 | 1 | |
| Schnyder, Franz | Franz Schnyder | Director | 1940 | 1 | |
| Schuckel, Gert | Gert Schuckel | Director | 1945 | 1 | |
| Sanin, A. | A. Sanin | Director | 1901 | 1 | |
| Schmaha, Josef | Josef Schmaha | Director | 1907 - 1909 | 4 | |
| Sørlie, Kirsten | Kirsten Sørlie | Director | 1980 - 1995 | 4 | |
| Sjenovatsj, Sergej | Sergej Sjenovatsj | Director | 1996 | 1 | |
| Sandven, Wilhelm | Wilhelm Sandven | Director | 1997 | 1 | |
| Simensen, Knut | Knut Simensen | Director | 2006 | 2 | |
| Sæther, Anne Mali | Anne Mali Sæther | Director | 2006 - 2007 | 2 | |
| Steigum, Jorid Bakken | Jorid Bakken Steigum | Director | 2009 | 2 | |
| Skjønnberg, Jo | Jo Skjønnberg | Director | 2009 | 4 | |
| Stranger, Marianne | Marianne Stranger | Director | 2012 | 1 | |
| Stuedal, Merete M. | Merete M. Stuedal | Director | 2013 | 2 | |
| Sekiguchi, Tsugio | Tsugio Sekiguchi | Director | 1918 | 1 | |
| Sergiev, E. | E. Sergiev | Director | 1923 | 1 | |
| Stojtschev, P. K. | P. K. Stojtschev | Director | 1923 | 1 | |
| Szinetár, Miklós | Miklós Szinetár | Director | 1974 - 1978 | 2 | |
| Sturzenegger, Yvonne | Yvonne Sturzenegger | Director | 1974 | 1 | |
| Skála, Jaroslav | Jaroslav Skála | Director | 1928 | 1 | |
| Stelzer, Peter A. | Peter A. Stelzer | Director | 1973 | 1 | |
| Siddons, Bruce | Bruce Siddons | Director | 1979 | 1 | |
| Saraiva, Hamilton | Hamilton Saraiva | Director | 1978 | 1 | |
| Shelton, Brian | Brian Shelton | Director | 1972 | 1 | |
| Szűcs, János | János Szűcs | Director | 1978 | 1 | |
| Sherrin, Robert | Robert Sherrin | Director | 1973 | 1 | |
| Schönerstädt, Emil | Emil Schönerstädt | Director | 1889 | 1 | |
| Schröder, Karl | Karl Schröder | Director | 1889 | 1 | |
| Scherenberg, Gustav | Gustav Otto Scherenberg | Director | 1892 | 1 | |
| Shapiro, Leonardo | Leonardo Shapiro | Director | 1975 | 1 | |
| Shapiro, Bruce G. | Bruce G. Shapiro | Director | 1979 | 1 | |
| Shoctor, Joseph | Joseph Shoctor | Director | 1972 | 1 | |
| Schumacher, Erich | Erich Schumacher | Director | 1972 | 1 | |
| Savadove, Lane | Lane Savadove | Director | 2014 | 1 | |
| Sokolovský, Evžen | Evžen Sokolovský | Director | 1972 - 1994 | 6 | |
| Szikora, János | János Szikora | Director | 1979 | 1 | |
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