| Imme, L. | L. Imme | Actor | 1918 | 1 | |
| Iltz, Walter | Walter Iltz | Actor | 1920 | 1 | |
| Iteh m. fl., Heinz | Heinz Iteh m. fl. | Actor | 1921 | 1 | |
| Ihle, Peter | Peter Ihle | Actor | 1921 - 1927 | 2 | |
| Islin, Gustl | Gustl Islin | Actor | 1924 | 1 | |
| Ilse, Asta | Asta Ilse | Actor | 1931 | 1 | |
| Iblacker, Edmund | Edmund Iblacker | Actor | 1932 | 2 | |
| Itter, Käthe | Käthe Itter | Actor | 1932 | 1 | |
| Illiger, Astrid | Astrid Illiger | Actor | 1933 - 1938 | 4 | |
| Ibsen-Ausgabe, Übersetzung der großen deutschen | Übersetzung der großen deutschen Ibsen-Ausgabe | | | | |
| Imkamp, Anton | Anton Imkamp | Actor | 1940 | 1 | |
| in der Au, Ottomar | Ottomar in der Au | Actor, Director | 1946 | 2 | |
| in der Au, Majo | Majo in der Au | Actor | 1946 | 2 | |
| Isterheil, Heinz | Heinz Isterheil | Actor | 1947 | 1 | |
| Inskaja, V. O. | V. O. Inskaja | Actor | 1900 - 1903 | 2 | |
| Ignatieva, Vera | Vera Ignatieva | Actor | 1901 - 1909 | 3 | |
| Ising, - | - Ising | Actor | 1901 | 1 | |
| Ivánfi, - | - Ivánfi | Actor | 1901 | 1 | |
| Isaïa, Smaragda | Smaragda Isaïa | Actor | 1902 | 1 | |
| Ikonomova, Manja | Manja Ikonomova | Actor | 1902 - 1907 | 4 | |
| Indriðadóttir, Lára | Lára Indriðadóttir | Actor | 1903 - 1904 | 2 | |
| Indriðadóttir, Ingibjörg | Ingibjörg Indriðadóttir | Actor | 1903 | 1 | |
| Ionidou, Korinna | Korinna Ionidou | Actor | 1903 | 4 | |
| Isaïas, Xenofon | Xenofon Isaïas | Actor | 1903 | 1 | |
| Innemann, Rudolf | Rudolf Innemann | Actor | 1904 - 1907 | 4 | |
| Iakovidis, Michaïl | Michaïl Iakovidis | Actor | 1908 - 1935 | 6 | |
| Italiaander, - | - Italiaander | Actor | 1908 | 1 | |
| Ichikawa, Danshi | Danshi Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Enjaku | Enjaku Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Samasu | Samasu Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Shocho | Shocho Ichikawa | Actor | 1909 | 1 | |
| Iliinskaia, Varvara | Varvara Iliinskaia | Actor | 1909 | 1 | |
| Iakovidou, Aspasia | Aspasia Iakovidou | Actor | 1909 | 1 | |
| Interne Teater, Studentersamfundets | Studentersamfundets Interne Teater | Adaptation | 1994 | 1 | |
| Ingle, Graham | Graham Ingle | Actor | 1994 | 9 | |
| Iversen, Mette | Mette Iversen | Actor | 1993 | 1 | |
| Indregard, Kjetil | Kjetil Indregard | Actor | 1993 | 1 | |
| Ingebricson, Eirik | Eirik Ingebricson | Lighting Designer | 1995 - 1996 | 2 | |
| Ingebrigtsen, Tove | Tove Ingebrigtsen | Mask Maker | 1996 - 2004 | 2 | |
| Ivarson, Svanhild | Svanhild Ivarson | Actor | 1996 - 2009 | 22 | |
| Isaksen, Oddleiv | Oddleiv Isaksen | Actor | 1997 - 2002 | 15 | |
| Iversen, Lars-Petter | Lars-Petter Iversen | Actor | 1998 | 1 | |
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