| Zegalski, Jerzy | Jerzy Zegalski | Director | 1959 - 1989 | 3 | |
| Zeiser, Hanskarl | Hanskarl Zeiser | Director | 1964 - 1967 | 2 | |
| Zieme, Bruno | Bruno Zieme | Director | 1970 - 1972 | 2 | |
| Zimmerman, Vivian | Vivian Zimmerman | Director | 1976 | 1 | |
| Zurmühle, Mark | Mark Zurmühle | Director | 1987 - 2010 | 7 | 1 |
| Zucchero, William H. | William H. Zucchero | Director | 1965 - 1968 | 2 | |
| Zuloeta, Julio | Julio Zuloeta | Director | 1979 - 1999 | 4 | |
| Zeiß, Dr. Karl | Karl Zeiß (Dr. Karl Zeiß) | Director | 1910 - 1915 | 2 | |
| Zvíkovský, František | František Zvíkovský | Director | 1903 | 1 | |
| Zsámbéki, Gábor | Gábor Zsámbéki | Director | 2002 - 2013 | 4 | 1 |
| Zajíc, Jan | Jan Zajíc | Director | 1973 | 1 | |
| Ziems, Kathleen | Kathleen Ziems | Director | 1975 | 1 | |
| Zankl, Horst | Horst Zankl | Director | 1974 - 1976 | 2 | |
| Zyromski, Robert | Robert Zyromski | Director | 1972 | 1 | 1 |
| Zervoulakos, Sarantos | Sarantos Zervoulakos | Director | 2009 - 2014 | 4 | |
| Zupančič, Matjaž | Matjaž Zupančič | Director | 1981 | 1 | |
| Zikova, Elena | Elena Zikova | Director | 1981 | 1 | |
| Zajączkowski, Stanisław | Stanisław Zajączkowski | Director | 1983 | 1 | |
| Zoth, Milt | Milt Zoth | Director | 2010 | 1 | |
| Zinger, Arie | Arie Zinger | Director | 1984 - 1999 | 4 | 1 |
| Zucchi, Augusto | Augusto Zucchi | Director | 1990 | 1 | |
| Zuckerman, Stephen | Stephen Zuckerman | Director | 1982 | 1 | 1 |
| Zajíc, Ondřej | Ondřej Zajíc | Director | 1995 | 1 | |
| Zayas, Jose | Jose Zayas | Director | 2002 | 1 | |
| Zsótér, Sándor | Sándor Zsótér | Director | 2005 - 2016 | 9 | 1 |
| Zinder, David | David Zinder | Director | 2008 | 1 | 1 |
| Zéda, Miroslav | Miroslav Zéda | Director | 1957 | 1 | 1 |
| Zioło, Rudolf | Rudolf Zioło | Director | 1986 - 1989 | 2 | |
| Ziemiańska, Jolanta | Jolanta Ziemiańska | Director | 1958 | 1 | |
| Zamkow, Lidia | Lidia Zamkow | Director | 1963 | 1 | |
| Zielinski, Sandi | Sandi Zielinski | Director | 2008 - 2015 | 2 | |
| Zadeh, Farzad, Ostovar | Farzad Ostovar Zadeh | Director | 2010 | 1 | |
| Zivot, Eric | Eric Zivot | Director | 2012 | 1 | 1 |
| Zoeckler, Charles | Charles Zoeckler | Director | 1961 | 1 | |
| Zandwijk, Alize | Alize Zandwijk | Director | 2017 | 1 | 1 |
| Zerwes, Dietmar | Dietmar Zerwes | Director | 1999 | 1 | |
| Zecha, Fritz | Fritz Zecha | Director | 1970 | 1 | 1 |
| Zanette, Mia | Mia Zanette | Director | 2016 | 1 | |
| Zogopoulos, Kostas | Kostas Zogopoulos | Director | 1977 | 1 | |
| Zakrzewski, Andrzej | Andrzej Zakrzewski | Director | 1977 | 1 | |
| Ziegler, Jakob | Jakob Ziegler | Director | 1921 | 1 | |
| Zazzali, Peter | Peter Zazzali | Director | 2015 | 1 | |
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