M
- Josef Mánes (1953)
- Guglielmo Marconi (1959)
- Bohuslav Martinů (1965, 1990)
- Karl Heinrich Marx (1951, 1965, 1968)
- Tomáš Masaryk (1920, 1925, 1928, 1930, 1935, 1937, 1945, 1947, 1990)
- Vladimir Vladimirovich Mayakovsky (1950)
- Gregor Johann Mendel (1965)
- Saint Methodius (1935)
- Adam Mickiewicz (1955)
- Jindřich Mošna (1961)
- Stefan Moyses (1947)
- Wolfgang Amadeus Mozart (1956, 1981, 1991)
- Alois Mrštík (1961)
- Alfons Maria Mucha (1960)
- Modest Mussorgsky (1989)
- Josef Václav Myslbek (1952)
- Josef Mysliveček (1956)
Read more about this topic: List Of People On Stamps Of Czechoslovakia