| Name | Functions  | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Marla J. Jurglanis | Costume Designer | 2011 | 1 | |||
| Ognjen Jeftic | Costume Designer | 2014 | 1 | |||
| Yvonne Jackson | Costume Designer | 1964 | 1 | |||
| Rhea Jackson | Costume Designer | 1961 | 1 | |||
| - Jappe-Alberts | Costume Designer | 1961 | 1 | |||
| Miller James | Costume Designer | 2011 | 2 | |||
| Francine Jacobs | Costume Designer | 1959 | 1 | |||
| Greta Johanson | Costume Designer | 1957 | 1 | |||
| Rosemarie Jakameit | Costume Designer | 1952 | 1 | |||
| Jean Jacobsen | Costume Designer | 1950 | 1 | |||
| Gro Johre | Costume Designer | 2000 | 1 | |||
| Rácz jelmezkölcsönző | Costume Designer | 1948 | 1 | |||
| Ola Jevnaker | Costume Designer | 2006 - 2012 | 3 | |||
| Clare Jeffrey | Costume Designer | 1978 - 1979 | 2 | 1 | ||
| Carin Jacobs | Costume Designer | 2018 | 1 | |||
| Oliver Jularić | Costume Designer | 2017 - 2021 | 2 | |||
| Ihab Jiryis | Costume Designer | 2020 | 1 | |||
| Else Ciljan Jakobsen | Costume Designer | 2019 - 2021 | 5 | |||
| Marianne Juvik Pedersen | Costume Designer | 2008 | 1 | |||
| Florence Jasselette | Costume Designer | 2021 - 2023 | 2 | |||
| Werner Juhrke | Costume Designer | 1966 | 1 | |||
| Adomas Jacovskis | Costume Designer | 1 | ||||
| Stanko Jovanović | Conductor | 2011 | 1 | |||
| Eivind Gullberg Jensen | Conductor | 2013 | 1 | 1 | ||
| Rudolf Jonas | Conductor | 1918 | 1 | |||
| Thomas Jensen | Conductor | 1935 - 1943 | 2 | |||
| Milton Johnson | Conductor | 1940 | 1 | |||
| Boris Joneš | Conductor | 1985 | 1 | |||
| Armas Järnefelt | Conductor | 1914 | 1 | |||
| Ilja Jacobson | Conductor | 1928 | 1 | |||
| Neeme Järvi | Conductor | 2006 | 1 | |||
| Alan John | Composer, Sound Designer | 2002 - 2017 | 5 | 1 | ||
| Aaron Krister Johnson | Composer, Sound Designer | 2004 | 2 | |||
| Terje Johannesen | Composer, Musician | 2002 - 2016 | 11 | 1 | ||
| Alex Joannides | Composer, Musical Director | 2009 | 2 | |||
| Sverre Jordan | Composer, Conductor | 1936 - 1957 | 8 | |||
| Pradeep Jayathilake | Composer | 2006 | 7 | |||
| Leif Jordanssen | Composer | 2008 | 4 | |||
| Robert Jud | Composer | 1977 | 1 | |||
| W. Junge | Composer | 1889 | 1 | |||
| Leoš Janáček | Composer | 1994 - 1996 | 3 | |||
| Sverre Indris Joner | Composer | 2004 - 2006 | 22 | |||