Swimming at the 2014 Summer Youth Olympics – Mixed 4 × 100 metre freestyle relay
The mixed 4 × 100 metre freestyle relay event in swimming at the 2014 Summer Youth Olympics took place on 17 August at the Nanjing Olympic Sports Centre in Nanjing, China.
Results
Heats
The heats were held at 11:22.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 3 | Li Zhuhao Qiu Yuhan Yu Hexin Zhang Yufei | 3:29.26 | Q | |
| 2 | 3 | 5 | Matheus Santana Luiz Altamir Melo Natalia de Luccas Giovanna Diamante | 3:33.14 | Q | |
| 3 | 2 | 7 | Kyle Stolk Kim Busch Robin Neumann Laurent Bams | 3:34.43 | Q | |
| 4 | 2 | 8 | Filipp Shopin Aleksandr Sadovnikov Rozaliya Nasretdinova Daria S. Ustinova | 3:35.40 | Q | |
| 5 | 2 | 6 | Duncan Scott Martyn Walton Amelia Maughan Charlotte Atkinson | 3:35.41 | Q | |
| 6 | 3 | 4 | Nic Groenewald Ami Matsuo Brianna Throssell Nicholas Brown | 3:36.51 | Q | |
| 7 | 3 | 2 | Damian Wierling Mandy Feldbinder Patricia Wartenberg Alexander Kunert | 3:37.18 | Q | |
| 8 | 2 | 3 | Juan Marín Sandra Pallarés Gonzalo Carazo África Zamorano | 3:38.13 | Q | |
| 9 | 1 | 5 | Žan Pogačar Grega Popović Nastja Govejšek Tjaša Pintar | 3:38.17 | ||
| 10 | 2 | 5 | Javier Acevedo Matthew Mac Danielle Hanus Danika Huizinga | 3:38.82 | ||
| 11 | 1 | 3 | Patrick Conaton Clara Smiddy Meghan Small Patrick Mulcare | 3:39.49 | ||
| 12 | 3 | 8 | Marlies Ross Chris Reid Brent Szurdoki Nathania van Niekerk | 3:40.81 | ||
| 13 | 3 | 1 | Henrik Christiansen Armin Porobic Elise Olsen Sofie Reisænen | 3:41.72 | ||
| 14 | 3 | 6 | Guillaume Laure Emma Terebo Pauline Mahieu Jean Dencausse | 3:42.17 | ||
| 15 | 2 | 2 | Ippei Watanabe Koki Tsunefuka Jurina Shiga Rina Yoshimura | 3:42.74 | ||
| 16 | 1 | 4 | Dylan Koo Marína Chan Samantha Yeo Darren Lim | 3:44.28 | ||
| 17 | 3 | 7 | Song Suk-gyu Park Jin-young Yang Ji-won Kim Jae-youn | 3:51.81 | ||
| 18 | 2 | 1 | Michael Mincham Jacob Garrod Bobbi Gichard Gabrielle Fa'amausili | 3:54.38 | ||
| 2 | 4 | DNS |
Final
The final was held at 18:51.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Li Guangyuan Qiu Yuhan Yu Hexin Shen Duo | 3:27.02 | WJR | ||
| 5 | Luiz Altamir Melo Natalia de Luccas Matheus Santana Giovanna Diamante | 3:31.55 | |||
| 7 | Kyle Chalmers Ami Matsuo Brianna Throssell Nicholas Brown | 3:31.76 | |||
| 4 | 6 | Filipp Shopin Evgeny Rylov Rozaliya Nasretdinova Daria S. Ustinova | 3:32.15 | ||
| 5 | 3 | Kyle Stolk Esmee Bos Robin Neumann Laurent Bams | 3:33.19 | ||
| 6 | 2 | Duncan Scott Martyn Walton Amelia Maughan Charlotte Atkinson | 3:33.28 | ||
| 7 | 1 | Damian Wierling Mandy Feldbinder Patricia Wartenberg Alexander Kunert | 3:36.51 | ||
| 8 | 8 | Juan Marín Sandra Pallarés Gonzalo Carazo África Zamorano | 3:38.10 |