| Knudsen, Lennart, Nordløf | Lennart Nordløf Knudsen | Conductor | 1945 | 2 | |
| Kragstad, Petter | Petter Kragstad | Conductor | 2013 – 2014 | 2 | |
| Kırhan, Yıldırım | Yıldırım Kırhan | Conductor | 1971 – 1972 | 1 | |
| Kajanus, Robert | Robert Kajanus | Conductor | 1916 | 1 | |
| Kleiber, Erich | Erich Kleiber | Conductor | 1917 | 1 | |
| Kraus, Richard | Richard Kraus | Conductor | 1927 | 1 | |
| Kuhn, Hans Peter | Hans Peter Kuhn | Composer, Sound Designer | 1991 – 1993 | 7 | |
| Kalodiki, Georgia | Georgia Kalodiki | Composer, Sound Designer | 2012 | 2 | |
| Kluger, Daniel | Daniel Kluger | Composer, Sound Designer | 2016 – 2020 | 3 | |
| Kettley, Steve | Steve Kettley | Composer, Musician | 2004 | 10 | |
| Kürstner, Thomas | Thomas Kürstner | Composer, Musical Director | 2002 | 2 | |
| Karahisaridis, Giannis | Giannis Karahisaridis | Composer, Director, Lighting Designer | 2008 | 3 | |
| Kaiser, Martin, | Martin Kaiser | Composer, Conductor | 1896 | 2 | |
| Koppel, Herman, D. | Herman D. Koppel | Composer, Conductor | 1964 | 2 | |
| Kalinowska, Halina | Halina Kalinowska | Composer | 1989 | 1 | |
| Kardaś, Grzegorz | Grzegorz Kardaś | Composer | 1972 | 1 | |
| Khalaf, Raed | Raed Khalaf | Composer | 2000 | 1 | |
| Koder, Urban | Urban Koder | Composer | 1979 | 2 | |
| Kunad, Rainer | Rainer Kunad | Composer | 1966 | 1 | |
| Karganoff, -, | - Karganoff | Composer | 1922 | 1 | |
| Knabl, Rudolf G. | Rudolf G. Knabl | Composer | 1981 – 2010 | 7 | |
| Klíč, Josef | Josef Klíč | Composer | 2011 | 1 | |
| Kjerulf, Halfdan, | Halfdan Kjerulf | Composer | 1879 | 3 | |
| Kücken, Friedrich Wilhelm, | Friedrich Wilhelm Kücken | Composer | 1885 | 3 | |
| Kontsky, -, | - Kontsky | Composer | 1887 | 1 | |
| Krüger, Carl, | Carl Krüger | Composer | 1921 | 1 | |
| Krohn, Max, | Max Krohn | Composer | 1929 | 2 | |
| Kannapinn, Friedrich, | Friedrich Kannapinn | Composer | 1946 | 1 | |
| Kruse, Bjørn H., | Bjørn H. Kruse (Bjørn H. Kruse) | Composer | 1991 | 38 | |
| Kopperud, Trond, | Trond Kopperud | Composer | 1993 | 12 | |
| Kluften, Tonny, | Tonny Kluften | Composer | 2001 | 1 | |
| Kodaly, Zoltán, | Zoltán Kodaly | Composer | 2006 | 1 | |
| Kinkel, Gottfried, | Gottfried Kinkel | Composer | 2006 – 2007 | 2 | |
| Kupka, Karel | Karel Kupka | Composer | 1973 | 1 | |
| Kanzaï, - | - Kanzaï | Composer | 2002 | 2 | |
| Kolehmainen, Eero-Pekka | Eero-Pekka Kolehmainen | Composer | 1995 | 2 | |
| Kmoch, - | - Kmoch | Composer | 1911 | 1 | |
| Kymlicka, Milan | Milan Kymlicka | Composer | 1973 | 1 | |
| Kapstad, Egil | Egil Kapstad | Composer | 1973 | 1 | |
| Kolberg, Kåre | Kåre Kolberg | Composer | 1981 – 1997 | 2 | |
| Kantardzhiev, Nikola | Nikola Kantardzhiev | Composer | 1956 – 1962 | 1 | |
| Kocyba , Tadeusz | Tadeusz Kocyba | Composer | 1983 | 2 | |
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