The girls' 4 × 100 metre freestyle relay event at the 2018 Summer Youth Olympics took place on 11 October at the Natatorium in Buenos Aires, Argentina.
Results Final The final was held at 19:14.Final results Rank Lane Name Nationality Time Notes 7 Elizaveta Klevanovich (55.92)Anastasia Makarova (56.84)Daria Vaskina (57.19)Polina Egorova (55.31) 3:45.26 3 Rafaela Raurich (56.46)Ana Vieira (56.48)Maria Pessanha (56.76)Fernanda de Goeij (57.50) 3:47.20 5 Miku Kojima (57.81)Mayuka Yamamoto (55.67)Nagisa Ikemoto (55.76)Shiori Asaba (1:00.03) 3:49.27 4 6 Yang Junxuan (56.00)Peng Xuwei (58.68)Zheng Muyan (1:02.43)Lin Xintong (56.08) 3:53.19 5 2 Kate Douglass (56.65)Ryan White (59.81)Maddie Donohoe (58.60)Kaitlynn Sims (58.26) 3:53.32 6 4 Duné Coetzee (58.39)Christin Mundell (58.84)Kate Beavon (59.07)Mariella Venter (1:01.10) 3:57.40 1
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