| Kavallari, Maria | Maria Kavallari | Composer | 2014 | 1 | |
| Kainer, Robert | Robert Kainer | Composer | 2013 | 1 | |
| Kawamoto, Satoru | Satoru Kawamoto | Composer | 1998 | 1 | |
| Kniep, Jason | Jason Kniep | Composer | 2000 | 1 | |
| Klemm, Thomas | Thomas Klemm | Composer | 2000 | 1 | |
| Kröger, Kaisa | Kaisa Kröger | Composer | 2000 | 1 | |
| Kalniņš, Jānis | Jānis Kalniņš | Composer | 1935 | 1 | |
| Kazasoglou, Giorgos | Giorgos Kazasoglou | Composer | 1945 | 1 | |
| Kauppi, Emil | Emil Kauppi | Composer | 1925 | 1 | |
| Keiding, Anders | Anders Keiding | Composer | 1976 | 1 | |
| Kálmán, Emmerich | Emmerich Kálmán | Composer | 2018 | 1 | |
| Kamimura, Shuhei | Shuhei Kamimura | Composer | 2018 | 2 | |
| Karetnikov, Nikolaj | Nikolaj Karetnikov | Composer | 1979 - 1981 | 2 | |
| Kilmer, Logan | Logan Kilmer | Composer | 2006 | 1 | |
| Knauer, Karl | Karl Knauer | Composer | 1933 | 1 | |
| Kakosaios, Fanis | Fanis Kakosaios (Φάνης Κακοσαίος) | Composer | 2023 | 1 | |
| Kaiser, Martin | Martin Kaiser | Composer, Conductor | 1896 | 2 | |
| Koppel, Herman, D. | Herman D. Koppel | Composer, Conductor | 1964 | 2 | |
| Karahisaridis, Giannis | Giannis Karahisaridis | Composer, Director, Lighting Designer | 2008 | 3 | |
| Kürstner, Thomas | Thomas Kürstner | Composer, Musical Director | 2002 - 2012 | 2 | |
| Kettley, Steve | Steve Kettley | Composer, Musician | 2004 | 10 | |
| 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 | |
| Klas, Eri | Eri Klas | Conductor | 1992 | 1 | 1 |
| Katajavuori, Esa | Esa Katajavuori | Conductor | 1994 | 1 | |
| Kohnke, Erich | Erich Kohnke | Conductor | 1932 | 1 | |
| Kießig, Georg | Georg Kießig | Conductor | 1939 | 1 | |
| Krannhals, Alexander | Alexander Krannhals | Conductor | 1940 | 1 | |
| Konwitschny, Franz | Franz Konwitschny | Conductor | 1940 | 1 | |
| Knudsen, Lennart, Nordløf | Lennart Nordløf Knudsen | Conductor | 1945 - 1946 | 2 | |
| Kragstad, Petter | Petter Kragstad | Conductor | 2013 - 2014 | 2 | |
| Kırhan, Yıldırım | 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 | |
| Karavaev, Yuri | Yuri Karavaev | Conductor | 2020 | 1 | |
| Knauf, Johanna | Johanna Knauf | Conductor | 2009 | 1 | |
| Kuroda, Yuko | Yuko Kuroda | Costume Designer | 1994 | 1 | |
| Kromminga, Katharina | Katharina Kromminga | Costume Designer | 2002 - 2017 | 8 | 1 |
| Klintsjeva, Sandra | Sandra Klintsjeva | Costume Designer | 2006 | 1 | |
| Kansallisteatteri, Suomen | Suomen Kansallisteatteri | Costume Designer | 1972 - 1973 | 2 | |
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