| Kurz, August | August Kurz | Director | 1887 | 1 | |
| Köchy, Max | Max Köchy | Director | 1897 | 1 | |
| Knowles, Edwin | Edwin Knowles | Director | 1898 | 1 | |
| Kilian, Eugen | Eugen Kilian | Director | 1896 - 1910 | 17 | |
| Krempien, Fritz | Fritz Krempien | Director | 1909 | 1 | |
| 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 | 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 | 1 |
| Klarskov, Paul | Paul Klarskov | Director | 2009 | 1 | |
| Kayn, Elena | Elena Kayn | Director | 2010 | 1 | |
| Korsunovas, Oskaras | Oskaras Korsunovas | Director | 2012 | 1 | 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 - 1975 | 2 | |
| Kaschenz, Kurt | Kurt Kaschenz | Director | 1974 | 1 | |
| Klett, Renate | Renate Klett | Director | 1973 | 1 | 1 |
| Karantinos, Sokratis | Sokratis Karantinos | Director | 1974 | 7 | |
| Kordziński, Roman | Roman Kordziński | Director | 1968 - 1971 | 3 | |
| Krobot, Ivo | Ivo Krobot | Director | 1995 - 1996 | 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 - 1983 | 2 | |
| Krampe, Klaus | Klaus Krampe | Director | 1975 - 1998 | 2 | |
| Kutz, Kazimierz | Kazimierz Kutz | Director | 1979 | 1 | |
| Kirst, Klaus-Dieter | Klaus-Dieter Kirst | Director | 1972 - 2010 | 2 | |
| Kreppel, Herbert | Herbert Kreppel | Director | 1966 - 1972 | 2 | |
| Kirchner, Otto | Otto Kirchner | Director | 1929 | 1 | |
| Kubik, Karl-Heinz | Karl-Heinz Kubik | Director | 1972 | 1 | |
| Kupke, Peter | Peter Kupke | Director | 1983 - 1997 | 6 | 1 |
| Keller, Jan | Jan Keller | Director | 1956 | 1 | 1 |
| Knick, Gerhard | Gerhard Knick | Director | 1961 - 1964 | 2 | |
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