| Oberthür, Charles | Charles Oberthür | Composer | 1880 | 1 | |
| Ostendorf, Nils | Nils Ostendorf | Composer | 2008 - 2014 | 54 | 1 |
| O'Neill, Norman | Norman O'Neill | Composer | 1913 | 1 | |
| O'Connor, Thom | Thom O'Connor | Composer | 2013 | 1 | |
| Oliver, Stephen | Stephen Oliver | Composer | 1977 - 1983 | 9 | |
| Ostaszewski, Jakub | Jakub Ostaszewski | Composer | 1995 | 1 | |
| Orbán, György | György Orbán | Composer | 1972 - 2002 | 2 | 1 |
| O’Brien, Scott | Scott O’Brien | Composer | 2001 | 1 | |
| Olsen, Leif | Leif Olsen | Composer | 2009 | 1 | |
| O'Riada, Sean | Sean O'Riada | Composer | 1961 | 1 | |
| Ostermeier, Bettina | Bettina Ostermeier | Composer | 2011 | 1 | |
| Ortman, Anders | Anders Ortman | Composer | 2020 | 5 | |
| Odland, Bruce | Bruce Odland | Composer | 2013 | 1 | |
| Omar, Sulekha Ali | Sulekha Ali Omar | Choreographer, Dancer | 2008 - 2010 | 4 | |
| Orlovsky, Claudia | Claudia Orlovsky | Choreographer | 1998 | 1 | |
| O'Kelly, Geri | Geri O'Kelly | Choreographer | 1993 | 1 | |
| Oscar, - | - Oscar | Choreographer | 2006 | 1 | |
| Owen, Sally | Sally Owen | Choreographer | 2010 | 1 | |
| Oehlschläger, Margarethe | Margarethe Oehlschläger | Choreographer | 1921 | 1 | |
| Ornelli, Otto | Otto Ornelli | Choreographer | 1938 | 1 | |
| Ousdal, Bodil | Bodil Ousdal | Choreographer | 1985 - 1991 | 6 | |
| Osuldsen, Johan | Johan Osuldsen | Choreographer | 1998 - 2000 | 3 | |
| Ogoun, Luboš | Luboš Ogoun | Choreographer | 1986 | 1 | |
| O'Neill, Katherine | Katherine O'Neill | Choreographer | 2004 | 1 | |
| Obradović, Vera | Vera Obradović | Choreographer | 2005 | 1 | |
| Oščepkov, Artur | Artur Oščepkov | Choreographer | 2013 | 1 | |
| O’Rourke, Rylee | Rylee O’Rourke | Assistant Director, Producer | 2020 - 2022 | 2 | |
| Olsoni, Kristin | Kristin Olsoni | Assistant Director | 1991 - 2006 | 2 | |
| Oestereich, Tilman | Tilman Oestereich | Assistant Director | 2013 | 1 | |
| Odağ, Efsane | Efsane Odağ | Assistant Director | 2019 | 1 | |
| Oberhäußer, Frank | Frank Oberhäußer | Assistant Director | 2006 | 1 | |
| Otton, Steve | Steve Otton | Assistant Director | 1984 | 1 | |
| Orlando, Carlo | Carlo Orlando | Assistant Director | 2021 | 3 | |
| O'Malley, Cathleen | Cathleen O'Malley | Assistant Director | 2022 | 1 | |
| Orlandelli, Paolo | Paolo Orlandelli | Assistant Director | 2019 | 1 | |
| Orsini, Luca | Luca Orsini | Assistant Director | 2015 | 1 | |
| Olsen, Ragnar | Ragnar Olsen | Adaptation, Translator | 1994 - 2018 | 58 | 1 |
| Osborne, John | John Osborne | Adaptation, Translator | 1972 - 2011 | 8 | 1 |
| Oldenhof, Bouke | Bouke Oldenhof | Adaptation, Translator | 1999 | 2 | |
| Ostermeier, Thomas | Thomas Ostermeier | Adaptation, Director, Translator | 2002 - 2024 | 233 | |
| Oikonomopoulou, Pepi | Pepi Oikonomopoulou | Adaptation, Director | 2006 | 2 | |
| Oschlag, Jakob | Jakob Oschlag | Adaptation, Director | 1977 - 2001 | 8 | 1 |
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