| Kustermann, Manuela | Manuela Kustermann | Actor | 1981 – 1993 | 9 | |
| Kortner, Fritz, | Fritz Kortner | Actor, Adaptation, Director | 1923 – 1965 | 9 | 1 |
| Kachel-Bender, Luise, | Luise Kachel-Bender | Actor | 1891 – 1906 | 9 | |
| Knudsen, Ove, | Ove Knudsen | Actor | 1899 – 1904 | 9 | |
| Kapila, Sohn, | Sohn Kapila | Actor | 2006 | 9 | |
| Kronacher, Dr. Alwin, | Alwin Kronacher (Dr. Alwin Kronacher) | Director | 1911 – 1925 | 9 | |
| Knuth, Gustav, | Gustav Knuth | Actor | 1924 | 9 | |
| Krastev, Dr. Krastjo, | Krastjo Krastev (Dr. Krastjo Krastev) | Actor, Translator | 1905 | 9 | |
| Kingdon, Frank, | Frank Kingdon | Actor | 1906 | 9 | |
| Kristiansen, Thor Inge, | Thor Inge Kristiansen | Actor | 1949 | 9 | |
| Kent, Jonathan, | Jonathan Kent | Actor, Director | 1977 – 2019 | 9 | |
| Korstad, Liv Jorunn, | Liv Jorunn Korstad | Actor | 1994 – 2001 | 9 | |
| Krook, Margaretha, | Margaretha Krook | Actor | 1950 – 1997 | 9 | |
| Kosmo, Ingebjørg, | Ingebjørg Kosmo | Actor | 2001 – 2015 | 9 | |
| Kolaas, Harald, | Harald Kolaas | Actor | 2009 – 2015 | 9 | |
| Klouman, Borghild | Borghild Klouman | Actor | 1928 | 9 | |
| Keresztes, Tamás | Tamás Keresztes | Actor | 2007 – 2019 | 9 | |
| Kurze, Günter | Günter Kurze | Actor | 1972 | 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 | |
| Kremp, Jan-Gregor | Jan-Gregor Kremp | Actor | 1995 | 9 | |
| Kopp, Dave | Dave Kopp | Actor | 2002 | 9 | |
| Kuhn, Gabriela | Gabriela Kuhn | Actor | 2002 | 9 | |
| Korljan, Stela | Stela Korljan | Adaptation, Director | 2002 | 9 | |
| 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 – 2005 | 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 | |
| Kolovos, Giorgos | Giorgos Kolovos | Actor | 2013 – 2014 | 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 | |
| Kern, Daniel | Daniel Kern | Actor | 1976 – 1995 | 8 | |
| Kjerstad, Per, | Per Kjerstad | Actor | 2006 – 2008 | 8 | 1 |
| Kleinoschegg, Willi, | Willi Kleinoschegg | Actor | 1917 – 1921 | 8 | |
| Kokkin, Janne, | Janne Kokkin | Actor | 1987 – 2013 | 8 | |
| Kokko-Saukkonen, Leena, | Leena Kokko-Saukkonen | Actor | 1999 – 2008 | 8 | 1 |
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