| Kosmo, Ingebjørg | Ingebjørg Kosmo | Actor | 2001 - 2014 | 9 | 1 |
| Klouman, Borghild | Borghild Klouman | Actor | 1928 - 1931 | 9 | |
| Keresztes, Tamás | Tamás Keresztes | Actor | 2007 - 2019 | 9 | 1 |
| Kurze, Günter | Günter Kurze | Actor | 1972 - 1995 | 9 | |
| Kitson, Barbara | Barbara Kitson | Actor, Dancer | 1923 - 1924 | 9 | |
| Konstantopoulos, Christos | Christos Konstantopoulos | Actor | 1985 | 9 | |
| Kopit, Arthur | Arthur Kopit | Translator | 1982 - 2010 | 9 | 1 |
| Kremp, Jan-Gregor | Jan-Gregor Kremp | Actor | 1995 | 9 | |
| Kopp, Dave | Dave Kopp | Actor | 2002 | 9 | |
| Kuhn, Gabriela | Gabriela Kuhn | Actor | 2002 | 9 | 1 |
| Kecsek, Karina | Karina Kecsek | Actor | 2001 - 2003 | 9 | |
| Kremer, Ulrike | Ulrike Kremer | Costume Designer | 2001 - 2003 | 9 | |
| Kovtun, Georgij | Georgij Kovtun | Adaptation, Choreographer, Director | 2003 - 2013 | 9 | |
| Knuts, Johan | Johan Knuts | Actor | 2004 | 9 | |
| Krüger, Jörg F. | Jörg F. Krüger | Actor | 2005 - 2010 | 9 | |
| Kirsch, Uli | Uli Kirsch | Actor | 2006 | 9 | |
| Klemt, Katja | Katja Klemt | Actor | 2009 - 2010 | 9 | |
| Kiritzé-Topor, Amélie | Amélie Kiritzé-Topor | Designer | 2013 - 2014 | 9 | |
| Kolovos, Giorgos | Giorgos Kolovos | Actor | 2013 | 9 | |
| Kicsid, Gizella | Gizella Kicsid | Actor | 2017 - 2019 | 9 | |
| Klykov, Vladimir | Vladimir Klykov | Sound Designer | 2017 - 2019 | 9 | |
| Kovács, Kinga | Kinga Kovács | Assistant Director | 2017 - 2019 | 9 | |
| Kromminga, Katharina | Katharina Kromminga | Costume Designer | 2002 - 2017 | 8 | 1 |
| Kern, Daniel | Daniel Kern | Actor | 1976 - 1995 | 8 | |
| Kjerstad, Per | Per Kjerstad | Actor | 2006 - 2008 | 8 | 2 |
| Kleinoschegg, Willi | Willi Kleinoschegg | Actor | 1917 - 1942 | 8 | 1 |
| Kokko-Saukkonen, Leena | Leena Kokko-Saukkonen | Actor | 1999 - 2008 | 8 | 1 |
| Kormákur, Baltasar | Baltasar Kormákur | Actor, Director | 1991 - 2008 | 8 | |
| Koszutska, Olga | Olga Koszutska | Adaptation, Director | 1954 - 1978 | 8 | |
| Kuhl, Katja | Katja Kuhl | Actor | 1966 - 1995 | 8 | 1 |
| Kvapilová, Hana | Hana Kvapilová | Actor | 1897 - 1906 | 8 | 1 |
| Kyser, Karl | Karl Kyser | Actor | 1921 - 1932 | 8 | |
| Kirke, Francis T. | Francis T. Kirke | Director | 2007 | 8 | |
| Kolárová, Růzena | Růzena Kolárová | Actor | 1897 - 1914 | 8 | |
| Karim, Mesbaul | Mesbaul Karim | Actor | 2000 - 2008 | 8 | |
| Kilavuz, Aram | Aram Kilavuz | Actor | 2010 | 8 | |
| Katzschmann, Christian | Christian Katzschmann | Dramaturg | 2010 - 2022 | 8 | |
| Kolling, Valdemar | Valdemar Kolling | Actor | 1870 - 1896 | 8 | |
| Kirckheiner, Mr. | Mr. Kirckheiner | Actor | 1878 - 1879 | 8 | |
| Królikowska, Eleonora | Eleonora Królikowska | Actor | 1883 - 1912 | 8 | |
| Kirkov, Vassil | Vassil Kirkov | Actor, Director | 1898 - 1905 | 8 | |
| Kosel, Walter | Walter Kosel | Actor | 1909 - 1919 | 8 | |
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