Swimming at the 1964 Summer Olympics – Women's 100 metre backstroke
The women's 100 metre backstroke event at the 1964 Olympic Games took place between October 13 and 14. This swimming event used backstroke. 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 | Nina Harmer | | 1:09.8 | |
| 2 | Satoko Tanaka | | 1:10.0 | |
| 3 | Linda Ludgrove | | 1:10.3 | |
| 4 | Helga Schmidt-Neuber | | 1:11.4 | |
| 5 | Helen Kennedy | | 1:12.5 | |
| 6 | Belinda Woosley | | 1:15.3 | |
| 7 | Jovina Tseng | | 1:20.7 | |
Heat 2
| Rank | Athlete | Country | Time | Note |
| 1 | Ginny Duenkel | | 1:08.9 | |
| 2 | Eileen Weir | | 1:09.7 | |
| 3 | Michiko Kihara | | 1:11.1 | |
| 4 | Kirsten Michaelsen | | 1:11.2 | |
| 5 | Tatyana Savelyeva | | 1:11.8 | |
| 6 | Mária Balla-Lantos | | 1:12.0 | |
| 7 | Bep Weeteling | | 1:13.1 | |
| 8 | Ursula Seitz | | 1:13.3 | |
Heat 3
| Rank | Athlete | Country | Time | Note |
| 1 | Cathy Ferguson | | 1:08.8 | |
| 2 | Françoise Borie | | 1:11.8 | |
| 3 | Petra Nerger | | 1:12.1 | |
| 4 | Sylvia Lewis | | 1:12.2 | |
| 5 | Ria van Velsen | | 1:12.2 | |
| 6 | Marlene Dayman | | 1:12.9 | |
| 7 | Anneliese Rockenbach | | 1:14.1 | |
| 8 | Margaret Harding | | 1:19.5 | |
Heat 4
| Rank | Athlete | Country | Time | Note |
| 1 | Kiki Caron | | 1:08.5 | |
| 2 | Jill Norfolk | | 1:10.6 | |
| 3 | Ingrid Schmidt | | 1:11.1 | |
| 4 | Nataliya Mikhaylova | | 1:11.4 | |
| 5 | Corrie Winkel | | 1:11.6 | |
| 6 | Nanette Duncan | | 1:12.4 | |
| 7 | Susana Peper | | 1:13.2 | |
| 8 | Jeon Ok-ja | | 1:21.7 | |
Final
| Rank | Athlete | Country | Time | Notes |
| Cathy Ferguson | | 1:07.7 | WR |
| Kiki Caron | | 1:07.9 | |
| Ginny Duenkel | | 1:08.0 | |
| 4 | Satoko Tanaka | | 1:08.6 | |
| 5 | Nina Harmer | | 1:09.4 | |
| 6 | Linda Ludgrove | | 1:09.5 | |
| 7 | Eileen Weir | | 1:09.8 | |
| 8 | Jill Norfolk | | 1:11.2 | |
Key: WR = World record
