Stupak is an occupational surname of Jewish (eastern Ashkenazic) and Ukrainian origin, which means "horse mill", or a worker at a horse-powered mill.
People with the surname Stupak include:
Alex Stupak (born 1980), American chef Bart Stupak (born 1952), American politician Bec Stupak (born 1974), American artist Bob Stupak (1942–2009), American businessman Yuliya Stupak (born 1995), Russian cross-country skier
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