The boys' 50 metre backstroke event at the 2010 Youth Olympic Games took place on August 17–18, at the Singapore Sports School.
| 26.36 | ||
| 26.45 | ||
| 26.46 | ||
| 26.46 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 6 | Christian Homer | 26.31 | Q | ||
| 2 | 4 | Abdullah Altuwaini | 26.62 | Q | ||
| 2 | 8 | Alexis Manacas da Silva Santos | 26.62 | Q | ||
| 4 | 5 | Max Ackermann | 26.63 | Q | ||
| 5 | 3 | Matuesz Wysoczynkski | 26.80 | Q | ||
| 6 | 2 | Abbas Raad | 28.76 | |||
| 7 | 7 | Fouad Al Atrash | 30.80 | |||
| 8 | 1 | Ammar Ghanim | 37.56 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 3 | Rainer Kai Wee Ng | 26.37 | Q | ||
| 2 | 4 | Andrii Kovbasa | 26.48 | Q | ||
| 3 | 6 | Pedro Antonio Costa | 27.04 | Q | ||
| 4 | 5 | Måns Hjelm | 27.23 | |||
| 5 | 2 | Martin Fakla | 27.54 | |||
| 6 | 8 | Heshan Unamboowe | 27.70 | |||
| 7 | 1 | Ruslan Baimanov | 27.94 | |||
| 7 | Alan Wladimir Abarca Cortes | DSQ |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | Christian Homer | 26.36 | ||||
| 5 | Rainer Kai Wee Ng | 26.45 | ||||
| 6 | Abdullah Altuwaini | 26.46 | ||||
| 7 | Max Ackermann | 26.46 | ||||
| 5 | 3 | Andrii Kovbasa | 26.58 | |||
| 6 | 2 | Alexis Manacas da Silva Santos | 26.86 | |||
| 7 | 1 | Matuesz Wysoczynski | 26.96 | |||
| 8 | 8 | Pedro Antonio Costa | 27.16 |