Zenon Stefaniuk was a Polish boxer.

He twice won the gold medal at the European Amateur Boxing Championships

European Amateur Boxing Championships

The European Amateur Boxing Championships is the highest competition for boxing amateurs in Europe, organised by the continent's governing body EUBC, which stands for the European Boxing Confederation...

 in the Bantamweight

Bantamweight

Bantamweight is usually a class in boxing for boxers who weigh above 115 pounds and up to 118 pounds . However, in Mixed Martial Arts it is 134-136 pounds . Wrestling also has similar weight classes including bantamweight...

 division at Warsaw 1953 and West Berlin 1955. He participated in the 1956 Summer Olympics

Boxing at the 1956 Summer Olympics

Boxing at the 1956 Summer Olympics took place in the new stadium at West Melbourne. A total number of 164 competitors entered from 35 nations, of whom 161 from 34 nations weighed-in and boxing was held eight nights and five afternoons. The boxing schedule began on November 23 and ended on December 1...

 in Melbourne

Melbourne

Melbourne is the capital and most populous city in the state of Victoria, and the second most populous city in Australia. The Melbourne City Centre is the hub of the greater metropolitan area and the Census statistical division—of which "Melbourne" is the common name. As of June 2009, the greater...

but without success.

He was four time winner of the Polish Boxing Championship (1952–1955), and represented Poland seven times in international matches (six wins, one loss).