- Kantianism and Psychoanalysis
- Kardiner, Abram (1891-1981)
- Katan, Maurits (1897-1977)
- Katan-Rosenberg, Anny (1898-1992)
- Katharina, Case of
- Kemper, Werner Walther (1899-1975)
- Kestemberg, Jean (1912-1975)
- Kestemberg-Hassin, Evelyne (1918-1989)
- Khan, Mohammed Masud Rasa (1924-1989)
- Klein-Reizes, Melanie (1882-1960)
- Klinische Studieüber Halbseitige Cerebrallähmung der Kinder [Clinical Study of Infantile Cerebral Paralysis]
- Knot
- Knowledge or Research, Instinct for
- Koch, Adelheid Lucy (1896-1980)
- Kohut, Heinz (1913-1981)
- Korea
- Kosawa, Heisaku (1897-1968)
- Kouretas, Demetrios (1901-1984)
- Kovács-Prosznitz, Vilma (1883-1940)
- Kraus, Karl (1874-1936)
- Kris, Ernst (1900-1957)
- Kris-Rie, Marianne (1900-1980)
