| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Tancred Ibsen | Director | 1963 | 1 | |||
| Zoe Incrocci | Actor | 1962 | 1 | |||
| Loula Ioannidou | Actor | 1961 - 1997 | 9 | |||
| Tor Isedal | Actor | 1961 | 1 | 1 | ||
| Philip Ingram | Actor | 1961 | 2 | |||
| Iza Itkin | Director, Producer | 1961 | 2 | |||
| Manfred Inger | Actor | 1960 - 1964 | 3 | |||
| Bolesław Idziak | Actor | 1959 | 1 | |||
| Marieta Ionescu Mihail | Choreographer | 1959 | 1 | |||
| Anne Iddon | Actor | 1958 - 1959 | 2 | |||
| Chie Iwasaki | Actor | 1958 | 1 | |||
| Grady Ivy | Actor | 1958 | 1 | |||
| Daniel Ivernel | Actor | 1958 | 1 | 1 | ||
| Naoji Iwata | Director | 1958 | 1 | |||
| Stanisław Igar | Actor, Director | 1957 - 1975 | 2 | |||
| Irina Ionescu | Actor | 1957 | 1 | |||
| Jon Isaja | Actor | 1957 | 1 | |||
| Anaid Iplicjian | Actor | 1956 - 1966 | 2 | |||
| L. Ivo | Designer | 1956 - 1957 | 3 | |||
| Alla Isajeva | Actor | 1956 | 1 | |||
| Srbolub Ivanovic | Actor | 1956 | 1 | |||
| Klara Ihász | Actor | 1956 | 1 | |||
| Feliciano Islas | Actor | 1956 | 1 | |||
| Gerald Isenthal | Lighting Designer | 1956 | 1 | |||
| Nicolae Ifrim | Actor | 1955 - 1976 | 3 | |||
| Gheorghe Ionescu-Gion | Actor | 1955 - 1973 | 2 | |||
| Lucian Ionescu | Musical Director | 1955 - 1966 | 3 | |||
| Irene Ibsen Bille | Adaptation | 1955 - 1964 | 2 | 1 | ||
| Franz Inwenden | Actor | 1955 | 1 | |||
| Bernard Iser | Actor | 1955 | 1 | |||
| Theano Ioannidou | Actor | 1955 | 1 | |||
| Luitgard Im | Actor | 1955 | 1 | |||
| Axel Ivers | Actor | 1955 | 1 | |||
| Nancy Illig | Actor | 1954 - 1986 | 3 | |||
| Krystyna Iłłakowicz | Actor | 1954 | 1 | |||
| Toshikazu Ito | Designer | 1953 | 1 | |||
| Pentti Irjala | Actor | 1953 | 1 | |||
| Blenda Isbey | Actor | 1951 | 1 | |||
| Ljubiša Iličić | Actor | 1951 | 1 | |||
| Konosuke Imafuku | Sound Designer | 1950 | 1 | |||
| Heinz Isterheil | Actor | 1947 | 1 | |||
| Ottomar in der Au | Actor, Director | 1946 | 2 | |||