Swimming at the 1948 Summer Olympics – Women's 100 metre freestyle
The women's 100 metre freestyle event at the 1948 Olympic Games took place between 30 July and 2 August at the Empire Pool. 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.
Results
Heats
Semifinals
Final
| Rank | Athlete | Country | Time | Notes |
| Greta Andersen | 1:06.3 | |||
| Ann Curtis | 1:06.5 | |||
| Marie-Louise Linssen-Vaessen | 1:07.6 | |||
| 4 | Karen Margrethe Harup | 1:08.1 | ||
| 5 | Ingegerd Fredin | 1:08.4 | ||
| 6 | Irma Heijting-Schuhmacher | 1:08.4 | ||
| 7 | Elisabeth Ahlgren | 1:08.8 | ||
| 8 | Fritze Carstensen | 1:09.1 |