| Kloke, Eberhard | Eberhard Kloke | Musical Director | 1975 | 1 | |
| Kovatzi-Skaltsa, Rena | Rena Kovatzi-Skaltsa | Musical Director | 1972 | 1 | |
| Kostřiba, Josef | Josef Kostřiba | Musical Director | 1988 | 1 | |
| Karger, Reinhard | Reinhard Karger | Musical Director | 1994 | 1 | |
| Kyriakaki-Loukissa, Olympia | Olympia Kyriakaki-Loukissa | Musical Director | 1978 - 2002 | 2 | |
| Krieg, Matthias | Matthias Krieg | Musical Director | 2016 | 1 | |
| Klinkenberg, Regina | Regina Klinkenberg | Musical Director | 2016 | 1 | |
| Kühlein, Fabian | Fabian Kühlein | Musical Director | 2011 | 1 | |
| Korth, Michael | Michael Korth | Musical Director | 2015 | 1 | |
| Kurn, Jeremy J. | Jeremy J. Kurn | Musical Director | 1999 | 1 | |
| Koutsoukos, Sakis | Sakis Koutsoukos | Musical Director | 1999 | 2 | |
| Kovacs, Dalma | Dalma Kovacs | Musical Director | 2016 | 1 | |
| Kirshenbaum, David | David Kirshenbaum | Musical Director | 1994 | 1 | |
| Kragset, Tove | Tove Kragset | Musical Director | 2019 | 1 | |
| Kalanov, Aleksansdar | Aleksansdar Kalanov | Musical Director | 2010 | 1 | |
| Köhler, Johannes | Johannes Köhler | Musical Director | 2021 | 1 | |
| Karadeloglou, Prodromos | Prodromos Karadeloglou | Musical Director | 2023 | 1 | |
| Kochetkov, Alexey | Alexey Kochetkov | Musical Director | 2021 | 1 | |
| Konieczny, Andrzej | Andrzej Konieczny | Musical Director | 2022 | 1 | |
| Klötzke, Ernst, August | Ernst August Klötzke | Musical Director, Musician | 2008 | 2 | 1 |
| Kalker, Fabian | Fabian Kalker | Musical Director, Musician | 2015 - 2022 | 3 | |
| Kjørren, Rune | Rune Kjørren | Musician | 2006 | 1 | 1 |
| Kant, Pandit Rama | Pandit Rama Kant | Musician | 2006 | 2 | |
| Klakegg, Rune | Rune Klakegg | Musician | 2008 | 2 | |
| Kittilsen, Håvard | Håvard Kittilsen | Musician | 2008 | 1 | |
| Kjernli, Torkild | Torkild Kjernli | Musician | 2010 | 1 | |
| Kjernli, Vegard | Vegard Kjernli | Musician | 2010 | 1 | |
| Klavenæs, Jon | Jon Klavenæs | Musician | 2013 | 1 | |
| Klepp, Hallvard | Hallvard Klepp | Musician | 2013 | 1 | |
| Kuntzsch, Joachim | Joachim Kuntzsch | Musician | 1975 - 1990 | 3 | |
| Kimman, Mirjam | Mirjam Kimman | Musician | 1991 | 1 | |
| Kober, Adrian | Adrian Kober | Musician | 1990 | 1 | |
| Kvifte, Tellef | Tellef Kvifte | Musician | 1988 | 1 | |
| Kværne, Elisabeth | Elisabeth Kværne | Musician | 1988 | 1 | |
| Kittelsen, Guttorm | Guttorm Kittelsen | Musician | 1980 | 1 | |
| Kristoffersen, Svenn Erik | Svenn Erik Kristoffersen | Musician | 1989 | 1 | |
| Knight, Julia | Julia Knight | Musician | 2005 - 2006 | 2 | |
| Käregård, Agnes | Agnes Käregård | Musician | 2001 | 1 | |
| Kazil, Jan | Jan Kazil | Musician | 1940 | 1 | |
| Kaukulis, Juris | Juris Kaukulis | Musician | 2013 | 1 | |
| Krämer, Norbert | Norbert Krämer | Musician | 2008 | 1 | |
| Kuriyama, Kozue | Kozue Kuriyama | Musician | 2016 | 1 | |
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