| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| John Ireys | Actor, Dancer | 1940 | 6 | |||
| Penka Ikonomova | Actor | 1940 | 1 | |||
| Karl Ingelius | Designer | 1941 | 1 | 1 | ||
| Anna Iblová | Actor | 1941 - 1943 | 2 | |||
| Lárus Ingólfsson | Actor, Costume Designer, Designer | 1942 - 1965 | 13 | |||
| Ola S. Isene (Ola Isene) | Actor | 1942 - 1978 | 17 | 1 | ||
| Ionel Iliescu | Actor | 1943 | 1 | |||
| Antonio Ibarra | Actor | 1943 | 1 | |||
| Federico Iribarren | Actor | 1943 | 1 | |||
| John Izon | Director | 1943 - 1948 | 4 | |||
| Rosalind Iden | Actor | 1943 - 1950 | 4 | |||
| Ansa Ikonen | Actor | 1943 - 1955 | 3 | |||
| Þorvaldur Ingólfsson | Actor | 1944 | 1 | |||
| Ottomar in der Au | Actor, Director | 1946 | 2 | |||
| Majo in der Au | Actor | 1946 | 2 | |||
| Wacław Izdebski | Actor | 1946 | 1 | |||
| Heinz Isterheil | Actor | 1947 | 1 | |||
| Konosuke Imafuku | Sound Designer | 1950 | 1 | |||
| Blenda Isbey | Actor | 1951 | 1 | |||
| Ljubiša Iličić | Actor | 1951 | 1 | |||
| Toshikazu Ito | Designer | 1953 | 1 | |||
| Pentti Irjala | Actor | 1953 | 1 | |||
| Krystyna Iłłakowicz | Actor | 1954 | 1 | |||
| Nancy Illig | Actor | 1954 - 1986 | 3 | |||
| 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 | |||
| Irene Ibsen Bille | Adaptation | 1955 - 1964 | 2 | 1 | ||
| Lucian Ionescu | Musical Director | 1955 - 1966 | 3 | |||
| Gheorghe Ionescu-Gion | Actor | 1955 - 1973 | 2 | |||
| Nicolae Ifrim | Actor | 1955 - 1976 | 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 | |||
| L. Ivo | Designer | 1956 - 1957 | 3 | |||
| Anaid Iplicjian | Actor | 1956 - 1966 | 2 | |||
| Irina Ionescu | Actor | 1957 | 1 | |||
| Jon Isaja | Actor | 1957 | 1 | |||