| Izadipour, Saeid | Saeid Izadipour | Director | 2013 | 1 | |
| Ibsen, Tancred | Tancred Ibsen | Director | 1963 | 1 | |
| Iseli, Laurence | Laurence Iseli | Director | 2018 | 2 | |
| Imard, Jérôme | Jérôme Imard | Director | 2015 | 1 | |
| Ieremia, Ioan | Ioan Ieremia | Director, Dramaturg | 1980 | 2 | |
| Iivanainen, Hilkka-Liisa | Hilkka-Liisa Iivanainen | Director, Dramaturg, Sound Designer | 2012 | 3 | |
| Itkin, Iza | Iza Itkin | Director, Producer | 1961 | 2 | |
| Ito, Akira | Akira Ito | Director, Sound Designer | 1997 | 2 | |
| Ikemura, Yasuko | Yasuko Ikemura | Director, Translator | 1980 | 2 | |
| Iversen, Solrun Toft, | Solrun Toft Iversen | Dramaturg | 2011 - 2014 | 2 | |
| Imre, Zoltán | Zoltán Imre | Dramaturg | 2005 | 2 | |
| Imrichová, Veronika | Veronika Imrichová | Dramaturg | 2011 | 1 | |
| Ichikawa, Hyoe | Hyoe Ichikawa | Dramaturg | 2007 | 1 | |
| Insel, Diana | Diana Insel | Dramaturg | 2009 - 2013 | 3 | |
| Isele, Bernd | Bernd Isele | Dramaturg | 2015 | 1 | |
| Ihle, Christin | Christin Ihle | Dramaturg | 2017 - 2018 | 2 | |
| Ivanov, Russi | Russi Ivanov | Lighting Designer | 2001 | 1 | |
| Ingalls, James F. | James F. Ingalls | Lighting Designer | 1982 - 2013 | 5 | |
| Ingebricson, Eirik, | Eirik Ingebricson | Lighting Designer | 1995 - 1996 | 2 | |
| Iwamura, Kazuo, | Kazuo Iwamura | Lighting Designer | 1924 - 1925 | 2 | |
| Iin, Jørn Me | Jørn Me Iin | Lighting Designer | 2000 | 2 | |
| Irbil, Clement | Clement Irbil | Lighting Designer | 2014 - 2015 | 3 | |
| Ismagilov, Damir | Damir Ismagilov (Дамир Исмагилов) | Lighting Designer | 2013 | 1 | |
| Iwasaki, Kazuo | Kazuo Iwasaki | Lighting Designer | 1980 | 1 | |
| Insley, Nick | Nick Insley | Lighting Designer | 2004 | 1 | |
| Irvine, Robert | Robert Irvine | Lighting Designer | 2007 | 1 | |
| Ivers, Colm | Colm Ivers | Lighting Designer | 2012 | 1 | |
| Iwaki, Hiroshi | Hiroshi Iwaki | Lighting Designer | 1964 | 1 | |
| Irmer, Rolf | Rolf Irmer | Lighting Designer | 2011 | 1 | |
| Ibochouba, L. | L. Ibochouba | Lighting Designer | 2012 | 1 | |
| Ingram, Lucas P. | Lucas P. Ingram | Lighting Designer | 2016 | 1 | |
| Isenthal, Gerald | Gerald Isenthal | Lighting Designer | 1956 | 1 | |
| Idzikowski, Marek | Marek Idzikowski | Lighting Designer | 2016 | 1 | |
| Iljama, Iiro | Iiro Iljama | Lighting Designer | 2005 | 1 | |
| Isaksen, Phillip | Phillip Isaksen | Lighting Designer | 2018 - 2020 | 3 | |
| Inaba, Izumi | Izumi Inaba | Lighting Designer | 2019 | 1 | |
| Ingebrigtsen, Tove, | Tove Ingebrigtsen | Mask Maker | 1996 - 2004 | 2 | |
| Intercoiffeur, Jean | Jean Intercoiffeur | Mask Maker | 1997 | 1 | |
| Indelicato, Giovanni | Giovanni Indelicato | Mask Maker | 1997 | 1 | |
| Ionescu, Lucian | Lucian Ionescu | Musical Director | 1955 - 1966 | 3 | |
| Iversen, Einar | Einar Iversen | Musical Director | 1974 | 10 | |
| Ivanovska, Emilija | Emilija Ivanovska | Musical Director | 2001 | 1 | |
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