Swimming at the 1964 Summer Olympics - Men's 100 metre freestyle

The men's 100 metre freestyle event at the 1964 Olympic Games took place between October 11 and 12. In freestyle swimming, the stroke used is not regulated (unlike backstroke, breaststroke, and butterfly events). Nearly all swimmers use the front crawl or a variant of that stroke. Because an Olympic size swimming pool is 50 metres long, this race consisted of two lengths of the pool.

Nine heats were held; the fastest 24 swimmers advanced to the Semifinals. Those that advanced are highlighted.

Three heats were held; the fastest eight swimmers advanced to the Finals. The swimmers that advanced are highlighted.

Key: OR = Olympic record

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