| Okajima, Yuki | Yuki Okajima | Lighting Designer | 2014 | 1 | |
| Ornbo, Robert | Robert Ornbo | Lighting Designer | 1978 - 1987 | 2 | 1 |
| Olivere, Marc | Marc Olivere | Lighting Designer | 1992 | 1 | |
| Ohsawa, Kaoru | Kaoru Ohsawa | Lighting Designer | 1991 | 1 | |
| O'Donoghue, Brian | Brian O'Donoghue | Lighting Designer | 1980 | 1 | |
| Orgal, Yehiel | Yehiel Orgal | Lighting Designer | 1995 | 1 | |
| Ogawa, Hisao | Hisao Ogawa | Lighting Designer | 1967 | 1 | |
| Offord, John | John Offord | Lighting Designer | 2002 | 1 | |
| Ostrowski, Andrew David | Andrew David Ostrowski | Lighting Designer | 2005 - 2007 | 2 | |
| O´Connell, Dyan | Dyan O´Connell | Lighting Designer | 2005 | 1 | |
| Otani, Hayato | Hayato Otani | Lighting Designer | 2006 | 2 | |
| Ono Seo, Rie | Rie Ono Seo | Lighting Designer | 2009 - 2010 | 2 | |
| Ollinger, Eduard | Eduard Ollinger | Lighting Designer | 2010 - 2012 | 5 | |
| Olson, Karin | Karin Olson | Lighting Designer | 2010 | 1 | |
| Okafor, Stella | Stella Okafor | Lighting Designer | 2009 | 1 | |
| Oblokar, Samo | Samo Oblokar | Lighting Designer | 2010 - 2012 | 3 | |
| O'Sullivan, Pat | Pat O'Sullivan | Lighting Designer | 1964 | 1 | |
| Ostrižnaja, O. | O. Ostrižnaja | Lighting Designer | 1999 - 2000 | 2 | |
| O´Donnell, Trisha | Trisha O´Donnell | Lighting Designer | 1981 | 1 | |
| Otto, Driscoll | Driscoll Otto | Lighting Designer | 2018 | 1 | |
| Omar, Haval | Haval Omar | Lighting Designer | 1997 | 1 | |
| Oakley, Martin | Martin Oakley | Lighting Designer | 2021 | 1 | |
| Ortiz, Carolina | Carolina Ortiz | Lighting Designer | 2022 | 1 | |
| Ozeran, Sergey | Sergey Ozeran | Lighting Designer | 2020 | 1 | |
| Osako, Koji | Koji Osako (大迫浩二) | Lighting Designer | 2023 | 2 | |
| Ohlsson, Monica | Monica Ohlsson | Dramaturg, Translator | 2005 - 2009 | 8 | 1 |
| Okawa, Tamaki | Tamaki Okawa (Ōkawa Tamaki / 大川珠季) | Dramaturg, Translator | 2024 | 2 | |
| Otten, Geeske | Geeske Otten | Dramaturg | 2006 | 3 | |
| Ohnemus, Chris | Chris Ohnemus | Dramaturg | 1999 - 2000 | 2 | |
| Obrtelová, Nora | Nora Obrtelová | Dramaturg | 2005 | 1 | |
| Odendahl-James, Jules | Jules Odendahl-James | Dramaturg | 2011 | 1 | |
| Oberschlick, Gerhard | Gerhard Oberschlick | Dramaturg | 1975 | 1 | |
| Ostermann, Brigitte | Brigitte Ostermann | Dramaturg | 2004 - 2008 | 4 | |
| Otto, Gabriele | Gabriele Otto | Dramaturg | 1992 | 1 | |
| Oberender, Thomas | Thomas Oberender | Dramaturg | 2003 - 2004 | 6 | 1 |
| Otčenášek, Štěpán | Štěpán Otčenášek | Dramaturg | 2013 | 3 | |
| Ott, Karen | Karen Ott | Dramaturg | 2003 | 1 | |
| Olivi, Laura | Laura Olivi | Dramaturg | 2006 - 2007 | 3 | |
| Ono, Y. | Y. Ono | Dramaturg | 2008 - 2009 | 3 | |
| Oe, Yoshihiko | Yoshihiko Oe | Dramaturg | 2010 | 16 | |
| Oshima, Akiko | Akiko Oshima | Dramaturg | 2009 | 1 | |
| Ono, Hacchaku | Hacchaku Ono | Dramaturg | 2009 | 3 | |
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