| Iwata, Naoji | Naoji Iwata | Director | 1958 | 1 | |
| Itkin, David, B. | David B. Itkin | Director | 1932 - 1951 | 6 | |
| Izon, John | John Izon | Director | 1943 - 1948 | 4 | |
| Irving, Jules | Jules Irving | Director | 1971 | 1 | 1 |
| Ioniță, Vali | Vali Ioniță | Director | 2005 | 1 | |
| Ingram, Alan | Alan Ingram | Director | 1971 | 1 | |
| Iffland, Gottfried | Gottfried Iffland | Director | 1973 | 1 | |
| Imre, Sándor | Sándor Imre | Director | 1924 - 1927 | 2 | |
| Ivakić, Joza | Joza Ivakić | Director | 1917 | 1 | |
| Ivancic, Germán | Germán Ivancic | Director | 2015 | 1 | |
| Ivanov, V. | V. Ivanov | Director | 1964 | 1 | |
| Ibsen, Tancred | Tancred Ibsen | Director | 1963 | 1 | |
| Iseli, Laurence | Laurence Iseli | Director | 2018 | 2 | |
| Imard, Jérôme | Jérôme Imard | Director | 2015 | 1 | |
| Idonea, Alessandro | Alessandro Idonea | Director | 2024 | 2 | |
| Ieremia, Ioan | Ioan Ieremia | Director, Dramaturg | 1980 | 2 | |
| Iivanainen, Hilkka-Liisa | Hilkka-Liisa Iivanainen | Director, Dramaturg, Sound Designer | 2012 | 3 | |
| Icke, Robert | Robert Icke | Director, Playwright | 2018 - 2021 | 3 | |
| Indraganti, Kiranmayi | Kiranmayi Indraganti (కిరణ్మయి ఇంద్రగంటి) | Director, Playwright | 2020 | 2 | |
| 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 - 2023 | 4 | |
| 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 - 2023 | 2 | |
| 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 | |
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