| Event: | Women's 100 metre backstroke |
| Games: | 1924 Summer |
| Date: | July 19–20 |
| Competitors: | 10 |
| Nations: | 5 |
| Gold: | Sybil Bauer |
| Goldnoc: | USA |
| Silver: | Phyllis Harding |
| Silvernoc: | GBR |
| Bronze: | Aileen Riggin |
| Bronzenoc: | USA |
| Next: | 1928 |
The women's 100 metre backstroke was a swimming event held as part of the swimming at the 1924 Summer Olympics programme.[1] It was the first appearance of the event, as women only swam freestyle events before this Games. The competition was held on Saturday July 19, 1924, and on Sunday July 20, 1924.
These were the standing world and Olympic records (in minutes) prior to the 1924 Summer Olympics.
| World Record | 1:22.4 |  Sybil Bauer | Miami (USA) | January 6, 1924 | |
|---|---|---|---|---|---|
| Olympic Record | - | none | - | - |
In the first heat Sybil Bauer set the first Olympic record with 1:24.0 minutes. In the final she bettered her own record to 1:23.2 minutes.
Saturday July 19, 1924: The fastest two in each semi-final and the faster of the two third-placed swimmer advanced to the final.
Semifinal 1
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:24.0 | QQ OR | ||||
| 2 | 1:29.4 | |||||
| 3 | 1:32.0 | |||||
| 4 | 1:38.2 | |||||
| 5 | 1:43.8 |
Semifinal 2
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:29.6 | |||||
| 2 | 1:37.0 | |||||
| 3 | 1:43.0 | |||||
| 4 | 1:44.0 | |||||
| 5 | 1:51.4 |
Sunday July 20, 1924:
| Place | width=220 | Swimmer | width=90 | Time |
|---|---|---|---|---|
| 1 | 1:23.2 OR | |||
| 2 | 1:27.4 | |||
| 3 | 1:28.2 | |||
| 4 | 1:30.8 | |||
| 5 | 1:31.2 |