| Schwarz, Carl, | Carl Schwarz | Director | 1917 | 1 | |
| Stockton Rand, Richard | Richard Stockton Rand | Director | 1999 | 1 | |
| Stopford, Clare | Clare Stopford | Director | 1990 | 1 | |
| Siegerstetter, Charlotte | Charlotte Siegerstetter | Director | 2010 | 5 | |
| Stengel, Kal Freiherr von, | Karl Freiherr von Stengel | Director | 1881 | 1 | |
| Sargent, Franklin, | Franklin Sargent | Director | 1891 | 1 | |
| Seifert, Jakub, | Jakub Seifert | Director | 1897 - 1899 | 2 | |
| Seidl, Hr., | Hr. Seidl | Director | 1879 | 1 | |
| Stollberg, J. G., | J. G. Stollberg | Director | 1900 - 1912 | 4 | |
| Stern, Kurt, | Kurt Stern | Director | 1905 - 1908 | 2 | |
| Simchowitz, Sascha, | Sascha Simchowitz | Director | 1916 | 1 | |
| Senger, Heinz, | Heinz Senger | Director | 1918 | 1 | |
| Schroeder, Hermann Albert, | Hermann Albert Schroeder | Director | 1925 | 1 | |
| Schneider, Carl, | Carl Schneider | Director | 1926 - 1940 | 4 | |
| 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 (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 (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 | |
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