| Thomassen, Tine | Tine Thomassen | Dramaturg, Sound Designer | 2006 - 2016 | 263 | 2 |
| Toseva, Lenče | Lenče Toseva | Dramaturg, Translator | 2011 - 2017 | 3 | 1 |
| Town, Johanna | Johanna Town | Lighting Designer | 2000 - 2003 | 2 | |
| To, German | German To | Lighting Designer | 2001 | 1 | |
| Takashima, Katsunosuke | Katsunosuke Takashima | Lighting Designer | 1928 | 1 | |
| Tan, Victor En Yu | Victor En Yu Tan | Lighting Designer | 1988 | 1 | |
| Tweebeeke, Reinier | Reinier Tweebeeke | Lighting Designer | 1992 - 1996 | 21 | |
| Tønder, Ingrid | Ingrid Tønder | Lighting Designer | 2003 | 37 | |
| Traub, Reinhard | Reinhard Traub | Lighting Designer | 2003 - 2008 | 5 | |
| Tynes, Dag | Dag Tynes | Lighting Designer | 2011 | 1 | |
| Thomassen, Per | Per Thomassen | Lighting Designer | 1971 | 44 | |
| Thayer, David | David L. Thayer | Lighting Designer | 1965 - 1979 | 2 | |
| Tammes, Andre | Andre Tammes | Lighting Designer | 1972 | 6 | |
| Torres, Carlos | Carlos Torres | Lighting Designer | 1976 - 1994 | 3 | |
| Thompson, Howard | Howard Thompson | Lighting Designer | 1961 - 1981 | 4 | |
| Tartaix, Raoul | Raoul Tartaix | Lighting Designer | 1976 | 1 | |
| Tohyama, Shizuo | Shizuo Tohyama | Lighting Designer | 1923 | 1 | |
| Tipton, Jennifer | Jennifer Tipton | Lighting Designer | 1983 - 2009 | 7 | |
| Torres, Santos | Santos Torres | Lighting Designer | 1976 | 1 | |
| Trautvetter, Dieter | Dieter Trautvetter | Lighting Designer | 1986 | 1 | |
| Tondellier, Liliane | Liliane Tondellier | Lighting Designer | 1993 - 2004 | 15 | |
| Truhlar, Robert | Robert Truhlar | Lighting Designer | 1950 | 1 | |
| Tindell, Bo | Bo Tindell | Lighting Designer | 2014 | 1 | |
| Thies, Howard | Howard Thies | Lighting Designer | 1992 | 1 | |
| Thomas, Clive | Clive Thomas | Lighting Designer | 1987 - 1993 | 2 | |
| Trottier, Patrice | Patrice Trottier | Lighting Designer | 1994 | 5 | |
| Tofield, Barry | Barry Tofield | Lighting Designer | 1980 | 1 | |
| Travaglia, Andrea | Andrea Travaglia | Lighting Designer | 1994 | 2 | |
| Tange, Michael | Michael Tange | Lighting Designer | 1995 | 1 | |
| Tyrén, Ingemar | Ingemar Tyrén | Lighting Designer | 1991 | 21 | |
| Tanaka, Kikuo | Kikuo Tanaka | Lighting Designer | 1997 - 2006 | 5 | |
| Thomson, Robert | Robert Thomson | Lighting Designer | 2002 - 2012 | 5 | 1 |
| Tzoras, Spyros | Spyros Tzoras | Lighting Designer | 2002 - 2003 | 4 | |
| Taylor, Mike | Mike Taylor | Lighting Designer | 1989 | 1 | |
| Tarantino, Mary | Mary Tarantino | Lighting Designer | 2001 | 1 | |
| Truebridge, Marc | Marc Truebridge | Lighting Designer | 2003 | 17 | |
| Terry, Matt | Matt Terry | Lighting Designer | 2004 | 1 | |
| Thomson Garey, Charles | Charles Thomson Garey | Lighting Designer | 2004 | 1 | |
| Theng, Hien-Chi | Hien-Chi Theng | Lighting Designer | 2005 - 2006 | 2 | |
| Tiikkainen, Minna | Minna Tiikkainen | Lighting Designer | 2001 | 1 | |
| Taylor, Jason | Jason Taylor | Lighting Designer | 2001 - 2015 | 2 | |
| Tallen, Deborah | Deborah Tallen | Lighting Designer | 2006 | 1 | |
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