Swimming at the 1964 Summer Olympics – Women's 100 metre freestyle
The women's 100 metre freestyle event at the 1964 Olympic Games took place between October 12 and 13. This swimming event used freestyle swimming, which means that the method of the stroke is not regulated. 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.
Medalists
Results
Heats
Heat 1| Rank | Athlete | Country | Time | Note |
| 1 | Kathy Ellis | 1:01.5 | ||
| 2 | Martina Grunert | 1:03.1 | ||
| 3 | Daniela Beneck | 1:03.2 | ||
| 4 | Winnie van Weerdenburg | 1:03.8 | ||
| 5 | Ryoko Urakami | 1:04.5 | ||
| 6 | Mary Beth Stewart | 1:05.1 | ||
| 7 | Im Geum-ja | 1:16.1 |
Heat 2
| Rank | Athlete | Country | Time | Note |
| 1 | Ann-Christine Hagberg | 1:02.5 | ||
| 2 | Rita Schumacher | 1:03.5 | ||
| 3 | Anneliese Rockenbach | 1:04.3 | ||
| 4 | Paola Saini | 1:04.4 | ||
| 5 | Sandra Keen | 1:04.7 | ||
| 6 | Toos Beumer | 1:05.2 | ||
| 7 | Ann Lallande | 1:06.8 |
Heat 3
| Rank | Athlete | Country | Time | Note |
| 1 | Jeanne Hallock | 1:03.6 | ||
| 2 | Robyn Thorn | 1:03.7 | ||
| 3 | Nataliya Ustinova | 1:04.2 | ||
| 4 | Kirsten Strange-Campbell | 1:05.3 | ||
| 5 | Traudi Beierlein | 1:05.4 | ||
| 6 | Monique Piétri | 1:05.8 | ||
| 7 | Christl Paukerl | 1:07.3 |
Heat 4
| Rank | Athlete | Country | Time | Note |
| 1 | Erica Terpstra | 1:02.5 | ||
| 2 | Judit Turóczy | 1:02.9 | ||
| 3 | Ulla Jäfvert | 1:03.8 | ||
| 4 | Nataliya Bystrova | 1:04.0 | ||
| 5 | Diana Wilkinson | 1:05.0 | ||
| 6 | Mara Sacchi | 1:05.9 | ||
| 7 | Hrafnhildur Guðmundsdóttir | 1:06.4 | ||
| 8 | Rosario de Vivanco | 1:09.0 |
Heat 5
| Rank | Athlete | Country | Time | Note |
| 1 | Dawn Fraser | 1:00.6 | ||
| 2 | Marion Lay | 1:02.1 | ||
| 3 | Katalin Takács | 1:03.5 | ||
| 4 | Toyoko Kimura | 1:04.8 | ||
| 5 | Marilyn Sidelsky | 1:05.5 | ||
| 6 | Linda Amos | 1:06.1 | ||
| 7 | Rita Pulido | 1:06.7 | ||
| 8 | Margaret Harding | 1:11.7 |
Heat 6
| Rank | Athlete | Country | Time | Note |
| 1 | Sharon Stouder | 1:02.3 | ||
| 2 | Lyn Bell | 1:02.4 | ||
| 3 | Csilla Madarász-Bajnogel-Dobai | 1:02.5 | ||
| 4 | Ann-Charlotte Lilja | 1:03.7 | ||
| 5 | Helen Kennedy | 1:04.2 | ||
| 6 | Miyoko Azuma | 1:06.4 | ||
| 7 | Jovina Tseng | 1:13.9 |
Semifinals
Heat 1| Rank | Athlete | Country | Time | Note |
| 1 | Dawn Fraser | 59.9 | ||
| 2 | Marion Lay | 1:02.2 | ||
| 3 | Lyn Bell | 1:02.2 | ||
| 4 | Csilla Madarász | 1:02.3 | ||
| 5 | Jeanne Hallock | 1:02.4 | ||
| 6 | Daniela Beneck | 1:02.9 | ||
| 7 | Judit Turóczy | 1:03.0 | ||
| 8 | Robyn Thorn | 1:03.9 |
Heat 2
| Rank | Athlete | Country | Time | Note |
| 1 | Sharon Stouder | 1:01.4 | ||
| 2 | Erica Terpstra | 1:02.3 | ||
| 3 | Kathy Ellis | 1:02.5 | ||
| 4 | Ann-Christine Hagberg | 1:02.8 | ||
| 5 | Martina Grunert | 1:03.1 | ||
| 6 | Katalin Takács | 1:03.3 | ||
| 7 | Ann-Charlotte Lilja | 1:03.9 | ||
| 8 | Ulla Jäfvert | 1:04.6 |
Final
| Rank | Athlete | Country | Time | Notes |
| Dawn Fraser | 59.5 | OR | ||
| Sharon Stouder | 59.9 | |||
| Kathy Ellis | 1:00.8 | |||
| 4 | Erica Terpstra | 1:01.8 | ||
| 5 | Marion Lay | 1:02.2 | ||
| 6 | Csilla Madarász-Bajnogel-Dobai | 1:02.4 | ||
| 7 | Ann-Christine Hagberg | 1:02.5 | ||
| 8 | Lyn Bell | 1:02.7 |
Key: OR = Olympic record