Swimming at the 1948 Summer Games: Previous Summer Games ▪ Next Summer Games
Host City: London, Great Britain
Venue(s): Wembley Arena, Wembley, London
Date Started: August 5, 1948
Date Finished: August 5, 1948
Format: Top three in each heat and the next two fastest advanced to the final.
| Gold: | Karen Margrethe Harup |
| Silver: | Suzanne Zimmerman |
| Bronze: | Judy-Joy Davies |
| Rank | Athlete | Age | Team | NOC | T | |
|---|---|---|---|---|---|---|
| 1 | Karen Margrethe Harup | 23 | Denmark | DEN | 1:15.5 | QU/OR |
| 2 | Ilona Novák | 23 | Hungary | HUN | 1:17.6 | QU |
| 3 | Muriel Mellon | 20 | United States | USA | 1:18.2 | QU |
| 4 | Dicky van Ekris | 15 | Netherlands | NED | 1:18.2 | QC |
| 5 | Greetje Gaillard | 21 | Netherlands | NED | 1:18.4 | QC |
| 6 | Cathie Gibson | 17 | Great Britain | GBR | 1:18.6 | |
| 7 | Ngaire Lane | 22 | New Zealand | NZL | 1:19.0 | |
| 8 | Beryl Marshall | Argentina | ARG | 1:20.7 |
| Rank | Athlete | Age | Team | NOC | T | |
|---|---|---|---|---|---|---|
| 1 | Suzanne Zimmerman | 23 | United States | USA | 1:16.8 | QU |
| 2 | Judy-Joy Davies | 20 | Australia | AUS | 1:17.8 | QU |
| 3 | Ria van der Horst | 15 | Netherlands | NED | 1:18.2 | QU |
| 4 | Helen Yate | 27 | Great Britain | GBR | 1:18.6 | |
| 5 | Barbara Jensen | 18 | United States | USA | 1:19.1 | |
| 6 | Monique Berlioux | 22 | France | FRA | 1:20.2 | |
| 7 | Vera Ellery | 21 | Great Britain | GBR | 1:20.8 |