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Date: 31 July 1948 / 1 August 1948 / 2 August 1948
Heats
Semi-finals
Final
| Rank | Name | Nation | Time |
| 1 | Greta Andersen | DEN | 1:06.3 |
| 2 | Ann Curtis | USA | 1:06.5 |
| 3 | Marie-Louise Vaessen | NED | 1:07.6 |
| 4 | Karen Margrethe Harup | DEN | 1:08.1 |
| 5 | Ingegard Fredin | SWE | 1:08.4 |
| 6 | Irma Schumacher | NED | 1:08.4 |
| 7 | Elisabeth Ahlgren | SWE | 1:08.8 |
| 8 | Fritze Carstensen | DEN | 1:09.1 |
| Semi-finals | |||
| 9 | Marie Corridon | USA | 1:08.9 |
| 10 | Marjorie McQuade | AUS | 1:09.3 |
| 10 | Lillian Preece | GBR | 1:09.3 |
| 12 | Piedade Coutinho | BRA | 1:09.5 |
| 12 | Marianne Lundquist | SWE | 1:09.5 |
| 14 | Patricia Nielsen | GBR | 1:09.6 |
| 15 | Judit Temes | HUN | 1:09.7 |
| 16 | Brenda Helser | USA | 1:10.0 |
| Heats | |||
| 17 | Josette Arene | FRA | 1:09.7 |
| 18 | Margaret Wellington | GBR | 1:09.8 |
| 18 | Hannie Termeulen | NED | 1:09.8 |
| 20 | Denise Spencer | AUS | 1:10.0 |
| 21 | Eleonora Schmitt | BRA | 1:10.8 |
| 22 | Eileen Holt | ARG | 1:12.0 |
| 23 | Ginette Jany | FRA | 1:12.1 |
| 23 | Fernande Caroen | BEL | 1:12.1 |
| 25 | Magda Bruggemann | MEX | 1:12.5 |
| 26 | Maria Littomeritzky | HUN | 1:13.0 |
| 27 | Kathleen McNamee | CAN | 1:13.3 |
| 28 | Irene Strong | CAN | 1:13.5 |
| 29 | Gisele Vallerey | FRA | 1:14.0 |
| 30 | Enriqueta Duarte | ARG | 1:14.9 |
| 31 | Zsuzsa Nador | HUN | 1:15.8 |
| 32 | Maria da Costa | BRA | 1:16.0 |
| 33 | Adriana Camelli | ARG | 1:16.5 |
| 34 | Marianne Erismann | SUI | 1:19.9 |