Swimming at the 2010 Summer Youth Olympics – Girls' 4 x 100 metre medley relay
| Swimming at the 2010 Summer Youth Olympics  | |||
|---|---|---|---|
| Freestyle events | |||
| 50 m | boys | girls | |
| 100 m | boys | girls | |
| 200 m | boys | girls | |
| 400 m | boys | girls | |
| Backstroke events | |||
| 50 m | boys | girls | |
| 100 m | boys | girls | |
| 200 m | boys | girls | |
| Breaststroke events | |||
| 50 m | boys | girls | |
| 100 m | boys | girls | |
| 200 m | boys | girls | |
| Butterfly events | |||
| 50 m | boys | girls | |
| 100 m | boys | girls | |
| 200 m | boys | girls | |
| Individual medley events | |||
| 200 m | boys | girls | |
| Freestyle relay events | |||
| 4×100 m | boys | girls | mixed |
| Medley relay events | |||
| 4×100 m | boys | girls | mixed |
The girls' 4 × 100 metre medley relay event at the 2010 Youth Olympic Games took place on August 16, at the Singapore Sports School.
Medalists
 Australia | 4:09.68 |
 Russia | 4:11.07 |
 Germany | 4:11.76 |
Heats
Heat 1
| Rank | Lane | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | 4 | Australia |
4:13.12 | Q |
| 2 | 3 | Germany |
3:13.38 | Q |
| 3 | 6 |  Japan |
4:19.00 | Q |
| 4 | 2 |  South Africa |
4:24.41 | Q |
| 5 | 5 |  Brazil |
4:25.66 | Q |
Heat 2
| Rank | Lane | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | 2 | Russia |
4:13.43 | Q |
| 2 | 3 |  China |
4:13.63 | Q |
| 3 | 4 |  Canada |
4:17.94 | Q |
| 4 | 7 |  United States |
4:26.15 | |
| 5 | 5 |  Singapore |
4:28.56 | |
| 6 |  Italy |
DNS |
Final
| Rank | Lane | Nationality | Time | Notes |
|---|---|---|---|---|
 |
4 | Australia |
4:09.68 | |
 |
3 | Russia |
4:11.07 | |
 |
5 | Germany |
4:11.76 | |
| 4 | 2 | Canada |
4:16.72 | |
| 5 | 7 | Japan |
4:16.80 | |
| 6 | 1 | South Africa |
4:23.52 | |
| 7 | 8 | Brazil |
4:24.62 | |
| 6 | China |
DSQ |