| Klingenfeld, Emma | Emma Klingenfeld (Emma Klingenfeld) | Translator | 1876 - 2007 | 57 | 1 |
| Kapteyn, F. | F. Kapteyn (F. Kapteyn) | Translator | 1894 - 1897 | 2 | |
| Kapteijn, F. | F. Kapteijn (F. Kapteijn) | Translator | 1896 - 1914 | 3 | |
| Kučera, Karel | Karel Kučera (Karel Kučera) | Translator | 1899 - 1940 | 5 | |
| Kawecka, Helena | Helena Kawecka (Helena Kawecka) | Translator | 1902 | 1 | 1 |
| Kosterka, Hugo | Hugo Kosterka (Hugo Kosterka) | Translator | 1903 - 1947 | 5 | |
| Kraus, Arnošt | Arnošt Kraus (Arnošt Kraus) | Translator | 1904 - 1941 | 11 | |
| Kotljarevski, Stefan Mladenov | Stefan Mladenov Kotljarevski (Stefan Mladenov Kotljarevski) | Translator | 1904 - 1905 | 2 | |
| Kempner, Gabriel | Gabriel Kempner (Gabriel Kempner) | Translator | 1906 - 1918 | 2 | |
| Klintscharov, Ivan G. | Ivan G. Klintscharov (Ivan G. Klintscharov) | Translator | 1907 | 1 | |
| Kochanowski, Stanisław | Stanisław Kochanowski (Stanisław Kochanowski) | Translator | 1909 | 1 | |
| Kostula, H. | H. Kostula (H. Kostula) | Translator | 1910 | 1 | |
| Kasprowicz, Jan | Jan Kasprowicz (Jan Kasprowicz) | Translator | 1910 - 1925 | 8 | 1 |
| Kiran, Hartvig | Hartvig Kiran (Hartvig Kiran) | Translator | 1973 - 1995 | 2 | |
| Krausová-Lesná, Milada | Milada Krausová-Lesná (Milada Krausová-Lesná) | Translator | 1922 - 1937 | 4 | |
| Kristan, Etbin | Etbin Kristan | Translator | 1925 | 1 | |
| Krawczykowski, Zbigniew | Zbigniew Krawczykowski | Translator | 1963 - 2007 | 14 | |
| Konuschlieva, Rajna | Rajna Konuschlieva | Translator | 1977 - 1983 | 3 | |
| Kleijn, Tom | Tom Kleijn | Translator | 1992 - 2008 | 21 | |
| Košak, Vinko | Vinko Košak | Translator | 1928 - 1929 | 2 | |
| Króliński, Kazimierz | Kazimierz Króliński | Translator | 1913 | 1 | |
| Kastro, Kaiti | Kaiti Kastro | Translator | 1978 | 3 | |
| Kulundžić, Josip | Josip Kulundžić | Translator | 1940 - 1995 | 8 | |
| Kaalø, Sten | Sten Kaalø | Translator | 1981 | 1 | 1 |
| Kontogianni, Rena | Rena Kontogianni | Translator | 1986 - 2013 | 4 | |
| Kidane, Mussie | Mussie Kidane | Translator | 2009 | 1 | |
| Kaňa, Jaroslav | Jaroslav Kaňa | Translator | 1983 | 1 | |
| Kristjánson, Jónas | Jónas Kristjánson | Translator | 1978 | 1 | |
| Knudsen, Erik | Erik Knudsen | Translator | 1976 - 1993 | 4 | |
| Kyrtzaki, Maria | Maria Kyrtzaki | Translator | 1991 | 1 | |
| Kopit, Arthur | Arthur Kopit | Translator | 1982 - 2010 | 9 | |
| Koskinen, Juhani | Juhani Koskinen | Translator | 1980 | 1 | |
| Karanastasis, Nikos | Nikos Karanastasis | Translator | 1994 | 1 | |
| Kornfeld, Edna | Edna Kornfeld | Translator | 1966 - 1968 | 2 | |
| Koefoed, Bjorn | Bjorn Koefoed | Translator | 1966 | 1 | |
| Kokotović, Nikola | Nikola Kokotović | Translator | 1888 - 1952 | 6 | |
| Karchadakis, Christos | Christos Karchadakis | Translator | 2004 - 2005 | 3 | |
| Köllnová, Božena | Božena Köllnová | Translator | 1960 | 1 | |
| Katušić Balen, Anka | Anka Katušić Balen | Translator | 2005 - 2006 | 2 | |
| Kučera, Antonín | Antonín Kučera | Translator | 1940 | 2 | |
| Krajewski-Bola, Andrzej, B. | Andrzej B. Krajewski-Bola | Translator | 2005 - 2012 | 5 | |
| Korpalska, Anna | Anna Korpalska | Translator | 2006 | 1 | |
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