| Kırhan, Yıldırım | Yıldırım Kırhan (Yıldırım Kırhan) | Conductor | 1971 | 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 - 2021 | 4 | |
| Kettley, Steve | Steve Kettley | Composer, Musician | 2004 | 10 | |
| Kürstner, Thomas | Thomas Kürstner | Composer, Musical Director | 2002 - 2012 | 2 | |
| Karahisaridis, Giannis | Giannis Karahisaridis (Giannis Karahisaridis) | Composer, Director, Lighting Designer | 2008 | 3 | |
| Kaiser, Martin | Martin Kaiser (Martin Kaiser) | Composer, Conductor | 1896 | 2 | |
| Koppel, Herman, D. | Herman D. Koppel | Composer, Conductor | 1964 | 2 | |
| Kalinowska, Halina | Halina Kalinowska (Halina Kalinowska) | Composer | 1989 | 1 | |
| Kardaś, Grzegorz | Grzegorz Kardaś (Grzegorz Kardaś) | Composer | 1972 | 1 | |
| Khalaf, Raed | Raed Khalaf (Raed Khalaf) | Composer | 2000 | 1 | |
| Koder, Urban | Urban Koder (Urban Koder) | Composer | 1979 - 1992 | 2 | |
| Kunad, Rainer | Rainer Kunad (Rainer Kunad) | Composer | 1966 | 1 | |
| Karganoff, - | - Karganoff (- Karganoff) | Composer | 1922 | 1 | |
| Knabl, Rudolf G. | Rudolf G. Knabl (Rudolf G. Knabl) | Composer | 1981 - 2008 | 7 | |
| Klíč, Josef | Josef Klíč (Josef Klíč) | Composer | 2011 | 1 | |
| Kjerulf, Halfdan | Halfdan Kjerulf (Halfdan Kjerulf) | Composer | 1879 - 1925 | 3 | |
| Kücken, Friedrich Wilhelm | Friedrich Wilhelm Kücken (Friedrich Wilhelm Kücken) | Composer | 1885 - 1888 | 3 | |
| Kontsky, - | - Kontsky (- Kontsky) | Composer | 1887 | 1 | |
| Krüger, Carl | Carl Krüger (Carl Krüger) | Composer | 1921 | 1 | |
| Krohn, Max | Max Krohn (Max Krohn) | Composer | 1929 - 1935 | 2 | |
| Kannapinn, Friedrich | Friedrich Kannapinn (Friedrich Kannapinn) | Composer | 1946 | 1 | |
| Kruse, Bjørn H. | Bjørn H. Kruse (Bjørn H. Kruse) | Composer | 1991 | 38 | |
| Kopperud, Trond | Trond Kopperud (Trond Kopperud) | Composer | 1993 | 12 | |
| Kluften, Tonny | Tonny Kluften (Tonny Kluften) | Composer | 2001 | 1 | |
| Kodaly, Zoltán | Zoltán Kodaly (Zoltán Kodaly) | Composer | 2006 | 1 | |
| Kinkel, Gottfried | Gottfried Kinkel (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 - 1996 | 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 | 1 | |
| Kocyba, Tadeusz | Tadeusz Kocyba | Composer | 1990 | 1 | |
| Kalantzopoulos, Panos | Panos Kalantzopoulos | Composer | 1990 | 1 | |
| Kirberg, Volker | Volker Kirberg | Composer | 2009 | 1 | |
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