| Medford, Don | Don Medford | Director | 1954 - 1959 | 2 | |
| More O'Ferrall, George | George More O'Ferrall | Director | 1957 | 1 | |
| Marks, Sherman | Sherman Marks | Director | 1957 | 1 | |
| Metzner, Ernö | Ernö Metzner | Director | 1933 | 1 | |
| Modestowicz, Waldemar | Waldemar Modestowicz | Director | 2006 | 1 | |
| Mandić Rigonat, Tatjana | Tatjana Mandić Rigonat | Director | 2021 | 1 | |
| Murphy, Joe | Joe Murphy | Director | 2022 | 1 | |
| Murray, Jake | Jake Murray | Director | 2022 | 10 | |
| Mario, Emilio | Emilio Mario | Director | 1896 | 1 | |
| Miralles, Carlos | Carlos Miralles | Director | 1938 | 1 | |
| Miró, Pau | Pau Miró | Director | 2015 - 2017 | 3 | |
| Maehler, Tobias | Tobias Maehler | Director | 2023 | 7 | |
| Mariam, Helen T | Helen T Mariam | Director | 2023 | 1 | |
| McAfee, Hailey | Hailey McAfee | Director | 2023 | 1 | |
| Mukhopadhyay, Suman | Suman Mukhopadhyay | Director | 2019 | 1 | |
| Moppel, Kertu | Kertu Moppel | Director | 2019 | 1 | |
| Masini, Jim | Jim Masini | Director | 2024 | 1 | |
| Minino, Antonio | Antonio Minino | Director | 2017 | 1 | |
| Merz-Raykov, Andreas | Andreas Merz-Raykov | Director | 2022 | 1 | |
| Matsyna, Olga | Olga Matsyna | Director | 2011 | 1 | |
| Merulla, Gina | Gina Merulla | Director | 2015 | 1 | |
| Masserano Taricco, Pietro | Pietro Masserano Taricco | Director | 1956 - 1962 | 2 | |
| Migliaccio, Luigi | Luigi Migliaccio | Director | 2017 | 1 | |
| Margio, Ugo | Ugo Margio | Director | 1986 | 1 | |
| Mabellini, Sandro | Sandro Mabellini | Director | 2015 | 1 | |
| Marino, Elena R. | Elena R. Marino | Director | 2017 | 2 | |
| Meadows, Robert | Robert Meadows | Director | 2024 | 1 | |
| Mufson, Michael | Michael Mufson | Director | 2024 | 1 | |
| Mestecky, Jana | Jana Mestecky | Director | 2024 | 1 | |
| Morrison, Michael | Michael Morrison | Director | 2024 | 1 | |
| Maughan, Josh | Josh Maughan | Director | | 1 | |
| Moscoloni, Facundo | Facundo Moscoloni | Director | 2024 | 1 | |
| Mckissick, Ellie | Ellie Mckissick | Director | 2024 | 1 | |
| Munárriz, Miguel | Miguel Munárriz | Director | 2009 | 12 | |
| Moseley, Becca | Becca Moseley | Director | 2025 | 1 | |
| McGuff, David | David McGuff | Director | 2025 | 2 | |
| Mȧumbe, Chelsy G. | Chelsy G. Mȧumbe | Director | 2025 | 1 | |
| Mesa, CC | CC Mesa | Director | 2025 | 1 | |
| Mukul, Aminur Rahman | Aminur Rahman Mukul | Director | 2010 | 1 | |
| Marcussen, Yngve | Yngve Marcussen | Director, Dramaturg | 2012 - 2015 | 6 | |
| Mädler, Kathrin | Kathrin Mädler | Director, Dramaturg | 2011 - 2016 | 4 | |
| Marholia, Roman | Roman Marholia | Director, Dramaturg | | 2 | |
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