| Name | Functions | Event Dates | Events | Resources  | ||
|---|---|---|---|---|---|---|
| John Izon | Director | 1943 - 1948 | 4 | |||
| Marek Idzikowski | Lighting Designer | 2016 | 1 | |||
| Bessenyei István | Actor | 2008 - 2014 | 4 | |||
| Wacław Izdebski | Actor | 1946 | 1 | |||
| Ellen Isenta | Actor | 1905 | 1 | |||
| Taylor Imel | Actor | 2017 | 2 | |||
| Paul Imbusch | Actor | 2000 | 1 | |||
| Héctor Illanes | Actor | 2000 | 1 | |||
| Dmitrij Isaev | Actor | 2000 | 1 | |||
| Frl. Isoard | Actor | 1879 | 1 | |||
| Gheorghe Ifrim | Actor | 2015 - 2019 | 7 | |||
| Hilkka-Liisa Iivanainen | Director, Dramaturg, Sound Designer | 2012 | 3 | |||
| Iiro Iljama | Lighting Designer | 2005 | 1 | |||
| Antonia Ionescu Micu | Actor | 2016 | 3 | |||
| Vali Ioniță | Director | 2005 | 1 | |||
| Alan Ingram | Director | 1971 | 1 | |||
| István István | Actor | 2008 | 2 | |||
| Éva Imre | Actor | 2017 - 2019 | 9 | |||
| Răzvan Ionescu | Actor | 1989 | 1 | |||
| Ioan Ieremia | Director, Dramaturg | 1980 | 2 | |||
| Viorel Iliescu | Actor | 1980 | 1 | |||
| Geta Iancu | Actor | 1980 | 1 | |||
| Ilarion Ionescu-Galați | Conductor | 2014 | 1 | |||
| Gottfried Iffland | Director | 1973 | 1 | |||
| Einar Iversen | Musical Director | 1974 | 10 | |||
| Claes Isaksson | Actor | 1975 | 1 | |||
| Gaetano Iannetta | Actor, Musical Director | 2017 | 8 | |||
| Rachael Ince-Kitson | Costume Designer | 2017 | 4 | |||
| Riccardo Iaccarino | Actor | 2016 | 1 | |||
| Uschi Illert | Actor | 1977 | 1 | |||
| Janusch Ittig | Actor | 2017 | 1 | |||
| Bjørn Ianke | Musician | 1990 | 1 | |||
| Taro Ishida | Actor | 1978 | 1 | |||
| Richard Ingraham | Sound Designer | 2017 | 1 | |||
| Mohammad Reza Imanian | Actor | 2017 | 1 | |||
| Joan Inwood | Actor | 1978 | 1 | |||
| Kurt Ingvall | Actor | 1973 - 1978 | 2 | |||
| Luitgart Im | Actor | 1981 | 2 | |||
| Jim Ivey | Actor | 1981 | 1 | |||
| Ryoko Inaba | Actor | 1983 | 1 | |||
| Yoshihito Ishinami | Actor | 1984 | 1 | |||
| Kjell Ingebretsen | Conductor | 1984 | 1 | |||