K
- Karel Václav Klíč (1957)
- Václav Kliment Klicpera (1959)
- Ján Kollár (1952)
- Vladimir Mikhaylovich Komarov (1964)
- Jan Amos Komenský (1936, 1952, 1957)
- Karel Kovařovic (1962)
- Jan Kozina (1945)
- Jan Kubelík (1994)
- Janko Kráľ (1968)
- Jiří Král (1945)
- Václav Matěj Kramerius (1953)
- Martin Kukučín (1953)
- Hana Kvapilová (1960)
Read more about this topic: List Of People On Stamps Of Czechoslovakia