| Ones, Arvid | Arvid Ones | Actor, Director | 1983 - 2004 | 22 | |
| Otto, Alex | Alex Otto | Actor, Director, Playwright | 1898 - 1934 | 21 | |
| Ousdal, Mads | Mads Ousdal | Actor | 1993 - 2020 | 21 | 3 |
| Oenslager, Donald | Donald Oenslager | Costume Designer, Designer, Lighting Designer | 1934 - 1951 | 19 | |
| Occhini, Ilaria | Ilaria Occhini | Actor | 1981 - 2005 | 19 | |
| Odasso, Cristina | Cristina Odasso | Actor | 2005 - 2006 | 19 | |
| Olsen, Arne, Thomas | Arne Thomas Olsen | Actor, Director | 1955 - 1963 | 19 | |
| Olsen, Ole | Ole Olsen | Actor, Composer | 1895 - 1922 | 18 | 1 |
| Ottesen, Rasmus | Rasmus Ottesen | Actor | 1902 - 1926 | 18 | |
| Olsen, Hans | Hans Olsen | Actor | 1902 - 1903 | 17 | |
| Ogawa, Keiko | Keiko Ogawa | Actor | 1999 - 2012 | 16 | |
| Orak, Aydin | Aydin Orak | Actor, Translator | 2010 | 16 | 2 |
| Olbrich, Julius | Julius Olbrich | Actor | 1876 - 1910 | 16 | |
| Oe, Yoshihiko | Yoshihiko Oe | Dramaturg | 2010 | 16 | |
| Ozora, Mayumi | Mayumi Ozora | Actor | 2010 | 16 | |
| Olohan, John | John Olohan | Actor | 1980 | 16 | |
| O'Hanlon, Máire | Máire O'Hanlon | Actor | 1980 | 16 | |
| Olsson, Bror | Bror Olsson | Actor | 1877 - 1928 | 15 | |
| Osterloh, Hildegard | Hildegard Osterloh | Actor | 1910 - 1916 | 15 | |
| Oliveira, Domingos, José Soares de | Domingos José Soares de Oliveira | Actor, Adaptation, Director, Lighting Designer, Sound Designer, Translator | 1983 - 1998 | 15 | |
| Odendahl, Florian | Florian Odendahl | Actor | 2004 - 2005 | 15 | |
| Okura, Shonosuke | Shonosuke Okura | Actor | 2005 - 2013 | 14 | |
| Otto, Teo | Teo Otto | Costume Designer, Designer, Director | 1934 - 1959 | 14 | |
| Olaussen, Gunhild Mathea | Gunhild Mathea Olaussen | Actor | 1994 - 2000 | 14 | |
| Olstad, Svein | Svein Olstad | Actor | 1999 - 2013 | 14 | |
| Obuch, Ladislav | Ladislav Obuch | Translator | 1955 - 2021 | 14 | |
| Oskam, Floor | Floor Oskam | Designer | 1991 - 1992 | 14 | |
| Otto-Körner, Margarethe | Margarethe Otto-Körner | Actor | 1898 - 1929 | 13 | |
| Oppermann, Heinrich | Heinrich Oppermann | Actor | 1895 - 1925 | 13 | |
| Orlamundt, Hans | Hans Orlamundt | Actor | 1877 - 1880 | 13 | |
| Otis, Elita Proctor | Elita Proctor Otis | Actor | 1903 | 13 | |
| Opøien, Lydia | Lydia Opøien | Actor | 1923 - 2006 | 13 | |
| Onetto, Elvira | Elvira Onetto | Actor | 2009 - 2011 | 13 | |
| Ozier, Laura | Laura Ozier | Mask Maker | 2000 - 2004 | 13 | |
| O'Brien, Timothy | Timothy O'Brien | Costume Designer, Designer | 1964 - 1996 | 12 | |
| Orlandini, Leo | Leo Orlandini | Actor | 1892 - 1924 | 12 | |
| Oskar, Otto | Otto Oskar | Actor | 1898 - 1916 | 12 | |
| Otto, Thomas | Thomas Otto | Actor | 1983 - 1993 | 12 | |
| Olesen, Kirsten | Kirsten Olesen | Actor | 1978 - 2011 | 12 | 1 |
| Ott, Friederike | Friederike Ott | Actor | 2014 - 2016 | 12 | |
| Olvera, Viridiana | Viridiana Olvera | Actor | 2006 | 12 | |
| Ost, Kathrin | Kathrin Ost | Actor | 2010 - 2011 | 12 | 2 |
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