| Kerr, John, R. | John R. Kerr | Director | 1941 | 1 | |
| Koch, Frederick | Frederick Koch | Director | 1942 | 1 | |
| Krause, Alvina | Alvina Krause | Director | 1942 | 1 | |
| Kaczmarek, Szymon | Szymon Kaczmarek | Director | 2014 | 1 | |
| Klata, Jan | Jan Klata | Director | 2015 - 2016 | 10 | |
| Kildahl, Erling, E. | Erling E. Kildahl | Director | 1946 - 1948 | 3 | |
| Klein, Jennie | Jennie Klein | Director | 2000 | 1 | |
| Krug, Karl | Karl Krug | Director | 1906 | 1 | |
| Killick, Jenny | Jenny Killick | Director | 2000 | 1 | |
| Krause, Michael | Michael Krause | Director | 1947 | 1 | |
| Kelley, Byron, R. | Byron R. Kelley | Director | 1948 | 1 | |
| Keith, Sherwood | Sherwood Keith | Director | 1949 | 1 | |
| Kerek, Peter | Peter Kerek | Director | 2015 - 2019 | 7 | |
| Kobboldt, Dietmar | Dietmar Kobboldt | Director | 2000 | 1 | |
| Kurt, Mustafa | Mustafa Kurt | Director | 2014 | 1 | |
| Karagiorgis, Klearchos | Klearchos Karagiorgis | Director | 1971 - 1973 | 2 | |
| Kjostarov, Dimitar | Dimitar Kjostarov | Director | 1957 - 1977 | 2 | |
| Konwitschny, Peter | Peter Konwitschny | Director | 2017 | 1 | |
| Kopf, Markus | Markus Kopf | Director | 2017 - 2018 | 5 | |
| Kerge, Ago-Endrik | Ago-Endrik Kerge | Director | 1978 | 1 | |
| Kreitmeier, Manuel | Manuel Kreitmeier | Director | 2017 | 1 | |
| Kleinert, Andreas | Andreas Kleinert | Director | 2016 | 1 | |
| Kasetani, Shinnichi | Shinnichi Kasetani | Director | 1984 | 1 | |
| Kapusta, Thomas | Thomas Kapusta | Director | 2013 | 1 | |
| Kaku, Eiji | Eiji Kaku | Director | 1993 | 1 | |
| Korad, Asuman | Asuman Korad (Asuman Korad) | Director | 1971 | 1 | |
| Kattwinkel, Susan | Susan Kattwinkel | Director | 2018 | 1 | |
| Khek, Pavel | Pavel Khek | Director | 2018 | 1 | |
| Klaus, Claudia | Claudia Klaus | Director | 2018 | 2 | |
| Kirsch, Richard | Richard Kirsch | Director | 1904 | 1 | |
| Kerkhof, Ingo | Ingo Kerkhof | Director | 2015 | 1 | |
| Kogan, Arthur | Arthur Kogan | Director | 2016 | 1 | |
| Kestler, Richard | Richard Kestler | Director | 1896 | 1 | |
| Krčar, Ksenija | Ksenija Krčar | Director | 2015 | 1 | |
| Konstantinović, Ana | Ana Konstantinović | Director | 2016 | 1 | |
| Konjović, Jovan | Jovan Konjović | Director | 1955 | 1 | |
| Ksenija Krnajski | Krnajski, Ksenija | Director | 2006 | 1 | |
| Kauzlarić, Vesna | Vesna Kauzlarić | Director | 1956 | 1 | |
| Karim, Adel | Adel Karim | Director | 2005 | 1 | |
| Khalil, Ismail | Ismail Khalil | Director | 1975 | 1 | |
| Kingston, Peter | Peter Kingston | Director | 1996 | 1 | |
| Korabel'nik, M. | M. Korabel'nik | Director | 1954 | 1 | |
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