Swimming at the 1980 Summer Olympics - Men's 100 metre butterfly

The final of the Men's 100 metres Butterfly event at the 1980 Summer Olympics was held in Moscow, Soviet Union, on Wednesday 23 July 1980.

The semi final heats for the Men's 100m butterfly took place on July 22, 1980 at the Olympic Swimming Pool. The fastest 8 swimmers, irrespective of heat, qualified for the final.

The first round heats for the Men's 100m butterfly took place on July 22, 1980 at the Olympic Swimming Pool. The fastest 16 swimmers, irrespective of heat, qualified for the semi finals.

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