| Name | Functions  | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Gustaf Ullman | Translator | 1919 | 1 | |||
| Marie Under | Translator | 1978 - 1997 | 2 | |||
| Parvathavani Unknown | Translator | 2019 | 1 | |||
| Hugo Urquijo | Translator | 1971 - 1972 | 2 | |||
| Teff Uchima | Sound Designer | 2001 | 2 | |||
| Paul Urmson | Sound Designer | 2013 | 1 | |||
| Fernando Ulivi | Sound Designer | 1997 | 1 | |||
| o.blaat (Keiko) Uenishi | Sound Designer | 2003 | 1 | |||
| James Uddo | Sound Designer | 2008 | 1 | |||
| Takashi Urasaki | Sound Designer | 2009 - 2010 | 3 | |||
| Yoshio Ueda | Sound Designer | 2010 | 1 | |||
| Amund Ulvestad | Sound Designer | 2018 - 2022 | 48 | |||
| Utz Utermann | Producer | 1963 | 1 | |||
| Hans Herbert Ulrich | Producer | 1935 | 1 | |||
| Marcelo Ullmann | Producer | 2022 | 1 | |||
| Ursula Unruh | Musician | 1976 | 1 | |||
| Juan Manuel Urbán | Musician | 2017 - 2020 | 2 | |||
| Klaus Ungen Schøll | Musician | 2008 | 1 | |||
| Ullitsdahl | Musician | 2023 | 1 | |||
| Andreas Utnem | Musical Director | 2014 - 2015 | 2 | |||
| Miodrag Udovicic | Musical Director | 2003 | 1 | |||
| Paul Urmuzescu | Musical Director | 1955 - 1956 | 2 | |||
| Lii Unt | Mask Maker | 1995 | 1 | |||
| Ullarun Vann Uma-Yim | Mask Maker | 1985 | 1 | |||
| Wolfgang Utzt | Mask Maker | 1991 | 1 | |||
| Shivika Upadhyay | Lighting Designer | 2010 | 1 | |||
| Klaus Unrath | Lighting Designer | 1996 | 1 | |||
| Jasim Uddin | Lighting Designer | 2004 | 1 | |||
| Constantin Ungureanu | Lighting Designer | 1969 - 1979 | 2 | |||
| Erich Ulbrich | Lighting Designer | 2000 - 2001 | 2 | |||
| Marvin Udevitz | Lighting Designer | 1947 | 1 | |||
| Zeljka Udovičić | Dramaturg | 1999 | 1 | |||
| Maria Uitdehaag | Dramaturg | 1990 | 1 | |||
| Júlia Ungár | Dramaturg | 1994 - 2016 | 10 | |||
| Peter Ulwan | Dramaturg | 1996 | 1 | |||
| Martin Urban | Dramaturg | 1998 | 1 | |||
| Stephen Unwin | Director, Translator | 1994 - 2013 | 59 | |||
| Naoya Uchimura | Director, Translator | 1965 - 1968 | 5 | |||
| Jason Underferth | Director, Lighting Designer, Producer | 2004 - 2012 | 32 | |||
| Ion Ungurjanu | Director, Dramaturg | 1979 - 1981 | 3 | |||
| Béla Udvaros | Director | 1971 - 1999 | 2 | |||
| Hansjörg Utzerath | Director | 1969 | 1 | |||