| Oudrey, Pierre | Pierre Oudrey (Pierre Oudrey) | Actor | 1973 | 1 | |
| Ohgitani, Kunio | Kunio Ohgitani (Kunio Ohgitani) | Director | 1980 | 1 | |
| Oenslager, Donald | Donald Oenslager (Donald Oenslager) | Costume Designer, Designer, Lighting Designer | 1934 - 1951 | 19 | |
| Olney, Joseph | Joseph Olney (Joseph Olney) | Actor | 1938 | 1 | |
| Ozerova, E A | E A Ozerova (E A Ozerova) | Actor | 1907 | 1 | |
| Orloff, Nicholas | Nicholas Orloff (Nicholas Orloff) | Actor | 1908 | 1 | |
| Osmanov, Bahram | Bahram Osmanov (Bahram Osmanov) | Director | 2006 | 1 | |
| Olsen, Inga | Inga Olsen (Inga Olsen) | Actor | 1877 - 1908 | 101 | |
| Ohmori, Kikuyo | Kikuyo Ohmori (Kikuyo Ohmori) | Actor | 1993 | 1 | |
| Ohberg, Åke | Åke Ohberg (Åke Ohberg) | Actor | 1954 | 1 | |
| Otten, Geeske | Geeske Otten (Geeske Otten) | Dramaturg | 2006 | 3 | |
| Ohnemus, Chris | Chris Ohnemus (Chris Ohnemus) | Dramaturg | 1999 - 2000 | 2 | |
| Oberkogler, Cornelia | Cornelia Oberkogler (Cornelia Oberkogler) | Actor | 1959 | 1 | |
| Oberska, Irena | Irena Oberska (Irena Oberska) | Actor | 1958 | 1 | |
| Obzyna, Gertrude | Gertrude Obzyna (Gertrude Obzyna) | | | | |
| Oddvar, August | August Oddvar (August Oddvar) | Actor | 1900 - 1954 | 108 | |
| Odstrčilová, Liběna | Liběna Odstrčilová (Liběna Odstrčilová) | Actor | 1919 - 1932 | 6 | |
| Oelkers, Uwe | Uwe Oelkers (Uwe Oelkers) | Costume Designer, Designer | 1985 - 2010 | 7 | |
| Oesch, Ditta | Ditta Oesch (Ditta Oesch) | Actor | 1944 | 1 | |
| Off, Marcus | Marcus Off (Marcus Off) | Actor | 2002 | 1 | |
| Ogasawara, Makoto | Makoto Ogasawara (Makoto Ogasawara) | Sound Designer | 1997 | 1 | |
| Ogawa, Keiko | Keiko Ogawa (Keiko Ogawa) | Actor | 1999 - 2012 | 16 | |
| Ogletree, Kathrine | Kathrine Ogletree (Kathrine Ogletree) | Costume Designer | 2003 | 1 | |
| Ohland, Hans | Hans Ohland (Hans Ohland) | Costume Designer, Designer | 1963 - 1981 | 4 | |
| Ohlin, Jonas | Jonas Ohlin (Jonas Ohlin) | Actor | 1999 | 1 | |
| Ohtake, Shinobu | Shinobu Ohtake (Shinobu Ohtake) | Actor | 1991 | 1 | |
| Oikonomopoulou, Pepi | Pepi Oikonomopoulou (Pepi Oikonomopoulou) | Adaptation, Director | 2006 | 2 | |
| Ojamaa, Pekka | Pekka Ojamaa (Pekka Ojamaa) | Costume Designer, Designer | 1990 - 2001 | 9 | |
| Oka, Mizuho | Mizuho Oka (Mizuho Oka) | Actor | 1928 | 1 | |
| Okopiński, Marek | Marek Okopiński (Marek Okopiński) | Actor | 1958 | 1 | |
| Okornicki, Kazimierz | Kazimierz Okornicki (Kazimierz Okornicki) | Actor, Director | 1908 - 1922 | 7 | |
| Okraska, Paweł | Paweł Okraska (Paweł Okraska) | Actor | 1999 | 1 | |
| Okun, Alexander | Alexander Okun (Alexander Okun) | Designer | 1992 - 2003 | 3 | |
| Okura, Shonosuke | Shonosuke Okura (Shonosuke Okura) | Actor | 2005 - 2013 | 14 | |
| Olchowska, (Nuna) Młodziejowska | (Nuna) Młodziejowska Olchowska ((Nuna) Młodziejowska Olchowska) | Actor | 1905 - 1907 | 2 | |
| Olderkjær, Stian | Stian Olderkjær (Stian Olderkjær) | Actor | 2006 | 1 | |
| Olenicki, Manfred | Manfred Olenicki (Manfred Olenicki) | Actor | 1995 - 1998 | 3 | |
| Oleś, Marcin | Marcin Oleś (Marcin Oleś) | Composer | 2006 - 2009 | 7 | |
| Olivar, César | César Olivar (César Olivar) | Costume Designer | 2004 | 1 | |
| Ollén, Gunnar | Gunnar Ollén (Gunnar Ollén) | Adaptation | 1947 - 2005 | 2 | |
| Olschansky, Aage | Aage Olschansky (Aage Olschansky) | Actor | 1981 | 1 | |
| Olsen, Augusta | Augusta Olsen (Augusta Olsen) | Actor | 1907 | 10 | |
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