| in der Au, Ottomar, | Ottomar in der Au | Actor, Director | 1946 | 2 | |
| Isefiær, Ellen, | Ellen Isefiær | Actor, Director | 1928 - 2006 | 26 | 2 |
| Ivarson-Moe, Anna, | Anna Ivarson-Moe | Actor, Director | 1919 - 1928 | 11 | |
| Ichikawa, Ennosuke, | Ennosuke Ichikawa | Actor, Director | 1913 - 1922 | 3 | |
| Ivarson, Victor, | Victor Ivarson | Actor, Director | 1923 - 1928 | 6 | |
| Ilmari, Vilho | Vilho Ilmari | Actor, Director | 1928 - 1954 | 6 | |
| Igar, Stanisław | Stanisław Igar | Actor, Director | 1957 - 1975 | 2 | |
| Iordănescu , Ştefan | Ştefan Iordănescu | Actor, Director | 1970 - 1998 | 6 | |
| Ioannou, Styliana | Styliana Ioannou | Actor, Director | 2017 - 2018 | 4 | |
| Isailović, Mihailo | Mihailo Isailović | Actor, Director | 1923 | 2 | |
| Iordanidis, Giannis | Giannis Iordanidis | Actor, Director, Dramaturg, Translator | 1965 - 2008 | 16 | |
| Iversen, Trine | Trine Iversen | Actor, Lighting Designer | 1988 | 2 | |
| Iannetta, Gaetano | Gaetano Iannetta | Actor, Musical Director | 2017 | 8 | |
| Islam, Md. Shohidul | Md. Shohidul Islam | Actor, Musician | 2000 - 2002 | 6 | |
| Isabel, Dudu | Dudu Isabel | Actor, Musician | 2016 | 2 | |
| Ising Jr., Arnold, | Arnold Ising Jr. | Actor, Translator | 1889 | 2 | |
| Interne Teater, Studentersamfundets, | Studentersamfundets Interne Teater | Adaptation | 1994 | 1 | |
| Ibsen Bille, Irene | Irene Ibsen Bille | Adaptation | 1955 - 1964 | 2 | |
| Ibrahim, George | George Ibrahim | Adaptation, Director | 2008 | 12 | |
| Ichon, Eduard | Eduard Ichon | Adaptation, Director | 1912 - 1933 | 6 | |
| Isbell, Tom | Tom Isbell | Adaptation, Director | 2020 | 2 | |
| Idrizi, Besfort | Besfort Idrizi | Assistant Director | 2013 - 2015 | 3 | |
| Ionescu , Eugenia-Gina | Eugenia-Gina Ionescu | Assistant Director | 1985 | 2 | |
| Iskrenova, Mila | Mila Iskrenova | Choreographer | 2001 | 1 | |
| Ishida, Taneo | Taneo Ishida | Choreographer | 1984 | 1 | |
| Ito, Brenda May | Brenda May Ito | Choreographer | 2004 | 1 | |
| István, Szőke | Szőke István | Choreographer | 2008 | 2 | |
| Isaacson, Helen | Helen Isaacson | Choreographer | 2003 | 1 | |
| Inger, Johan | Johan Inger | Choreographer | 2017 | 1 | |
| Ionescu Mihail, Marieta | Marieta Ionescu Mihail | Choreographer | 1959 | 1 | |
| Ishii, Toru | Toru Ishii | Composer | 1978 | 1 | |
| Ivanovič, Marko | Marko Ivanovič | Composer | 2004 - 2012 | 2 | |
| Iftimie, Nicu | Nicu Iftimie | Composer | 2009 - 2015 | 3 | |
| Ištvan, Miloš | Miloš Ištvan | Composer | 1986 | 1 | |
| Ikebe, Shinnichiro | Shinnichiro Ikebe | Composer | 1995 | 1 | |
| Ives, - | - Ives | Composer | 2002 | 1 | |
| Ioannidis, Agis | Agis Ioannidis | Composer | 2003 | 1 | |
| Ioan, Raluca | Raluca Ioan | Composer | 2005 | 1 | |
| Iacono, Christoph | Christoph Iacono | Composer | 2009 | 1 | |
| Iserloh, Oliver | Oliver Iserloh | Composer | 2012 | 1 | |
| Ikonomakis, Dimitris | Dimitris Ikonomakis | Composer | 2013 | 1 | |
| Inovlockij, Leonid | Leonid Inovlockij | Composer | 1999 | 1 | |
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