Look up Marczak in Wiktionary, the free dictionary.
Marczak is a surname of Polish origin. Notable people with the surname include:
- Bill Marczak, American computer scientist
- Michał Marczak (born 1982), Polish director and cinematographer
- Ryszard Marczak (born 1945), Polish Olympic athlete
- Sebastian Marczak (born 1983), Australian sprint canoeist