| Event: | Men's 100 metre backstroke |
| Games: | 1924 Summer |
| Date: | July 16–18 |
| Competitors: | 20 |
| Nations: | 11 |
| Gold: | Warren Kealoha |
| Goldnoc: | USA |
| Silver: | Paul Wyatt |
| Silvernoc: | USA |
| Bronze: | Károly Bartha |
| Bronzenoc: | HUN |
| Prev: | 1920 |
| Next: | 1928 |
The men's 100 metre backstroke was a swimming event held as part of the swimming at the 1924 Summer Olympics programme.[1] It was the fourth appearance of the event, which was established in 1908. The competition was held on Wednesday July 16, 1924, on Thursday July 17, 1924, and on Friday July 18, 1924.
These were the standing world and Olympic records (in minutes) prior to the 1924 Summer Olympics.
| World Record | 1:12.4 |  Warren Kealoha | Honolulu (USA) | April 13, 1924 | |
|---|---|---|---|---|---|
| Olympic Record | 1:14.8 | Warren Kealoha | Antwerp (BEL) | August 22, 1920 |
In the first heat Warren Kealoha set a new Olympic record with 1:13.4 minutes. In the final he bettered his own record to 1:13.2 minutes.
Wednesday July 16, 1924: The fastest two in each heat and the fastest third-placed from across the heats advanced.
Heat 1
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:13.4 | QQ OR | ||||
| 2 | 1:19.0 | |||||
| 3 | 1:23.2 | |||||
| 4 | 1:25.0 |
Heat 2
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:18.0 | |||||
| 2 | 1:21.8 | |||||
| 3 | 1:24.6 | |||||
| 4 | 1:26.0 | |||||
| 5 | 1:28.0 | |||||
| — | DSQ |
Heat 3
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:19.4 | |||||
| 2 | 1:22.4 | |||||
| 3 | 1:41.2 |
Heat 4
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:18.8 | |||||
| 2 | 1:20.2 | |||||
| 3 | 1:24.8 |
Heat 5
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:24.0 | |||||
| 2 | 1:27.4 | |||||
| 3 | 1:27.8 | |||||
| 4 | 1:29.0 |
Thursday July 17, 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 | 1:13.6 | QF | ||||
| 2 | 1:17.0 | QF | ||||
| 3 | 1:19.0 | qf | ||||
| 4 | 1:19.8 | |||||
| 5 | 1:22.0 | |||||
| 6 | 1:26.6 |
Semifinal 2
| Place | width=220 | Swimmer | width=90 | Time | width=90 | Qual. |
|---|---|---|---|---|---|---|
| 1 | 1:19.0 | QF | ||||
| 2 | 1:19.2 | QF | ||||
| 3 | 1:23.4 | |||||
| 4 | 1:24.2 | |||||
| 5 | 1:24.2 |
Friday July 18, 1924:
| Place | width=220 | Swimmer | width=90 | Time |
|---|---|---|---|---|
| 1 | 1:13.2 OR | |||
| 2 | 1:15.4 | |||
| 3 | 1:17.8 | |||
| 4 | 1:19.6 | |||
| 5 | 1:20.0 |