| Kronacher, Dr. Alwin, | Alwin Kronacher (Dr. Alwin Kronacher) | Director | 1911 - 1925 | 9 | |
| Kasten, Otto, | Otto Kasten | Director | 1938 | 1 | |
| Klopsch, Kurt, | Kurt Klopsch | Director | 1945 | 1 | |
| Koefod, Thorvald, | Thorvald Koefod | Director | 1900 | 1 | |
| Kugelberg, F., | F. Kugelberg | Director | 1902 | 1 | |
| Klausen, Kjell, | Kjell Klausen | Director | 2003 | 1 | |
| Klein, Lone, | Lone Klein | Director | 2006 | 1 | |
| Kongshavn, Linn Meyer, | Linn Meyer Kongshavn | Director | 2006 - 2008 | 3 | |
| Klarskov, Paul, | Paul Klarskov | Director | 2009 | 1 | |
| Kayn, Elena, | Elena Kayn | Director | 2010 | 1 | |
| Korsunovas, Oskaras, | Oskaras Korsunovas | Director | 2012 | 1 | |
| Kilde, Gunhild Aarebrot, | Gunhild Aarebrot Kilde | Director | 2013 - 2014 | 2 | |
| Kārkliņš [Zeltmatis], Ernests, | Ernests Kārkliņš [Zeltmatis] | Director | 1917 | 1 | |
| Krinkels, L., | L. Krinkels | Director | 1918 | 1 | |
| Kantor, Alexandr, | Alexandr Kantor | Director | 1923 | 1 | |
| Klein, Heinz Joachim | Heinz Joachim Klein | Director | 1960 | 2 | |
| Kaschenz, Kurt | Kurt Kaschenz | Director | 1974 | 1 | |
| Klett, Renate | Renate Klett | Director | 1973 | 1 | |
| Karantinos, Sokratis | Sokratis Karantinos | Director | 1974 | 7 | |
| Kordziński, Roman | Roman Kordziński | Director | 1968 - 1971 | 3 | |
| Krobot, Ivo | Ivo Krobot | Director | 1995 | 2 | |
| Kay, Arthur W. | Arthur W. Kay | Director | 1928 - 1967 | 2 | |
| Komisarževskis, Fjodors | Fjodors Komisarževskis | Director | 1929 | 1 | |
| Kostopoulos, Lampros | Lampros Kostopoulos | Director | 1972 - 1989 | 4 | |
| Kaplan, Em. | Em. Kaplan | Director | 1911 | 1 | |
| Knights, Robert | Robert Knights | Director | 1974 | 1 | |
| Kerr, Tom | Tom Kerr | Director | 1975 | 1 | |
| Kříž, Karel | Karel Kříž | Director | 1972 | 2 | |
| Krampe, Klaus | Klaus Krampe | Director | 1975 | 2 | |
| Kutz , Kazimierz | Kazimierz Kutz | Director | 1979 | 1 | |
| Kirst, Klaus-Dieter | Klaus-Dieter Kirst | Director | 1972 | 2 | |
| Kreppel, Herbert | Herbert Kreppel | Director | 1966 | 2 | |
| Kirchner, Otto | Otto Kirchner | Director | 1929 | 1 | |
| Kubik, Karl-Heinz | Karl-Heinz Kubik | Director | 1972 | 1 | |
| Kupke, Peter | Peter Kupke | Director | 1983 - 1992 | 6 | |
| Keller, Jan | Jan Keller | Director | 1956 | 1 | |
| Knick, Gerhard | Gerhard Knick | Director | 1961 | 2 | |
| Kougioumtzis, Mimis | Mimis Kougioumtzis | Director | 1989 | 1 | |
| Khan, Khaled | Khaled Khan | Director | 1993 | 1 | |
| Karadzhov, Ivan | Ivan Karadzhov | Director | 1993 | 1 | |
| Krewer, Harald | Harald Krewer | Director | 1995 | 1 | |
| Kustila, Heikki | Heikki Kustila | Director | 1995 | 1 | |
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