| Reucker, Alfred, | Alfred Reucker | Director | 1901 - 1906 | 3 | |
| Rémond, Fritz, | Fritz Rémond | Director | 1911 | 1 | |
| Röbbeling, Hermann, | Hermann Röbbeling | Director | 1915 | 1 | |
| Rampelmann, Adolph, | Adolph Rampelmann | Director | 1920 | 1 | |
| Reich, Bernhard, | Bernhard Reich | Director | 1922 | 1 | |
| Rausse, Dr. Hubert, | Hubert Rausse (Dr. Hubert Rausse) | Director | 1928 | 1 | |
| Robert, Josef, | Josef Robert | Director | 1928 | 1 | |
| Rose, Paul, | Paul Rose | Director | 1933 - 1942 | 3 | |
| Rott, Adolf, | Adolf Rott | Director | 1934 - 1965 | 4 | |
| Reichert, Franz, | Franz Reichert | Director | 1946 - 1965 | 2 | |
| Raeck, Kurt, | Kurt Raeck | Director | 1949 | 1 | |
| Rommen, Ann-Christin, | Ann-Christin Rommen | Director | 2005 - 2006 | 3 | |
| Roziskey, Miss, | Miss Roziskey | Director | 1916 | 1 | |
| Rakitin, Jurij Ljvovič, | Jurij Ljvovič Rakitin | Director | 1921 - 1951 | 4 | |
| Rýdl, Antonín, | Antonín Rýdl | Director | 1922 | 1 | |
| Russell, Thomas | Thomas Russell | Director | 1926 | 1 | |
| Richter, Eberhard | Eberhard Richter | Director | 1974 | 1 | |
| Ribell, Frederik | Frederik Ribell | Director | 1974 - 1980 | 3 | |
| Rădulescu, V. | V. Rădulescu | Director | 1928 | 1 | |
| Ritzén, Linda | Linda Ritzén | Director | 2010 | 5 | |
| Roos, Staffan | Staffan Roos | Director | 1974 - 1975 | 2 | |
| Rogall, Hugo | Hugo Rogall | Director | 1900 | 2 | |
| Rahn, Hans, Julius | Hans Julius Rahn | Director | 1889 | 1 | |
| Röder, Michael | Michael Röder | Director | 1975 | 1 | |
| Rallis, Stelios | Stelios Rallis | Director | 1979 | 1 | |
| Rakovský, Tibor | Tibor Rakovský | Director | 1979 | 1 | |
| Richardson, Tony | Tony Richardson | Director | 1976 | 1 | |
| Richards, Lloyd | Lloyd Richards | Director | 1965 - 1981 | 2 | |
| Riha, Carl | Carl Riha | Director | 1981 | 1 | |
| Roland, Karl Heinz | Karl Heinz Roland | Director | 1983 | 1 | |
| Retallack, John | John Retallack | Director | 1985 | 20 | |
| Reig, Josefina, Molina | Josefina Molina Reig | Director | 1962 | 1 | |
| Ryg, Eli | Eli Ryg | Director | 1983 | 1 | |
| Rintoul, Brian | Brian Rintoul | Director | 1987 | 1 | |
| Ruiz, Mariá | Mariá Ruiz | Director | 2001 | 5 | |
| Richards, Peter | Peter Richards | Director | 2009 | 2 | |
| Reidel, Leslie | Leslie Reidel | Director | 2009 | 1 | |
| Ruello, Catherine | Catherine Ruello | Director | 1978 | 1 | |
| Randel, Melissa, R. | Melissa R. Randel | Director | 2012 | 1 | |
| Röntz, Wilhelm | Wilhelm Röntz | Director | 1907 | 1 | |
| Robertson , Robert | Robert Robertson | Director | 1985 | 1 | |
| Reible , Dieter | Dieter Reible | Director | 1987 | 1 | |
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