Swimming at the 2010 Summer Youth Olympics – Mixed 4 × 100 metre medley relay
# Swimming at the 2010 Summer Youth Olympics – Mixed 4 × 100 metre medley relay

The mixed 4 × 100 metre medley relay event at the 2010 Youth Olympic Games took place on August 20, at the Singapore Sports School.

## Medalists

| China | 3:52.52 |
| - | - |
| Russia | 3:55.29 |
| Australia | 3:55.63 |

## Heats

### Heat 1

| Rank | Lane | Nationality | Time | Notes |
| - | - | - | - | - |
| 1 | 5 | China | 3:56.78 | Q |
| 2 | 2 | Spain | 4:07.05 | |
| 3 | 4 | Hong Kong | 4:14.66 | |
| 4 | 6 | Serbia | 4:21.02 | |
| | 3 | Italy | | DNS |

### Heat 2

| Rank | Lane | Nationality | Time | Notes |
| - | - | - | - | - |
| 1 | 6 | Russia | 4:00.67 | Q |
| 2 | 4 | France | 4:00.82 | Q |
| 3 | 5 | Canada | 4:02.69 | Q |
| 4 | 7 | United States | 4:04.29 | Q |
| 5 | 2 | South Africa | 4:06.14 | |
| 6 | 3 | Iceland | 4:18.81 | |

### Heat 3

| Rank | Lane | Nationality | Time | Notes |
| - | - | - | - | - |
| 1 | 4 | Australia | 3:59.14 | Q |
| 2 | 3 | Germany | 4:02.56 | Q |
| 3 | 6 | Japan | 4:06.13 | Q |
| 4 | 5 | Brazil | 4:08.25 | |
| 5 | 2 | Singapore | 4:08.94 | |
| 6 | 7 | Trinidad and Tobago | 4:20.21 | |

## Final

| Rank | Lane | Nationality | Time | Notes |
| - | - | - | - | - |
| | 4 | China | 3:52.52 | |
| | 3 | Russia | 3:55.29 | |
| | 5 | Australia | 3:55.63 | |
| 4 | 6 | France | 3:56.64 | |
| 5 | 7 | Canada | 4:02.22 | |
| 6 | 1 | United States | 4:02.90 | |
| 7 | 8 | Japan | 4:06.18 | |
| | 2 | Germany | | DSQ |
