The women's 4 × 100 metres relay at the 2024 World Athletics U20 Championships was held at the Estadio Atlético de la VIDENA in Lima, Peru on 30 and 31 August 2024.

Records U20 standing records prior to the 2024 World Athletics U20 Championships were as follows: Record Nation Mark Location DateWorld U20 Record42.59Cali, Colombia5 August 2022Championship Record42.59Cali, Colombia5 August 2022World U20 Leading42.91Willemstad, Curaçao30 March 2024

Results Heats First 2 of each heat (Q) plus 2 fastest times (q) qualify to Final. Heat 1 Rank Lane Nation Athletes Time Notes13Timea Rankl, Lia Thalmann, Chloé Rabac, Alicia Masini44.88, 25Savannah Blair, Dianna Proctor, Renée Tedga, Kiara Webb45.23, 36Anna Karandukova, Diana Myroshnichenko, Uliana Stepaniuk, Alina Kyshkina45.2644Ericka Maseras, Ivana Peralta, Carla Martínez, Jazmin Romeu45.8459Sofia Segura, Antonia Ramírez, Catalina Rozas, Blanca Yarur46.1568Camille Romero, Xiomara Ibarra, Génesis Cañola, Marolyn Pastrana47.432Philina Schwartz, Sherin Kimuanga, Annika Just, Holly Okuku7Mabel Akande, Kissiwaa Mensah, Faith Akinbileje, Jasmine Wilkins

Heat 2 Rank Lane Nation Athletes Time Notes17Jade Brown, Cynteria James, Avery Lewis, Davenae Fagan44.22, 28Thewbelle Philp, Olivia Inkster, Olivia Dodds, Aleksandra Stoilova44.7632Oliwia Kasprzak, Jagoda Żukowska, Inga Kanicka, Julia Adamczyk45.0046Ruiula Bhonsle, Neole Cornelio, Abinaya Rajarajan, Sudheeksha Vadluri45.3154Lana Oberholzer, Kaili Botje, Roline Louw, Atang Naane46.6163Luciana Cateriano, Bianca Conroy, María Alondra, Cayetana Chirinos49.315Kenniyah Guischard-Yearwood, Janae De Gannes, Akira Malaver, Alexxe Henry9

Heat 3 Rank Lane Nation Athletes Time Notes18Sabrina Dockery, Alliah Baker, Briana Campbell, Alana Reid43.8129Legna Echevarria, Frances Colon, Amanda Andino, Karina Franceschi45.28, 36Elisa Marcello, Agnese Musica, Melissa Turchi, Rachele Torchio45.5544Lucija Potnik, Pika Bikar Kern, Karolina Zbičajnik, Lina Hribar45.6357Wedu Matiwe, Same Mhutsiwa, Kelebonye Otela, Sethunya Majama46.435Larissa Souza, Vanessa dos Santos, Hemily De Jesus, Hakelly da Silva3Nina Thevenin, Shana Lambourde, Vanessa Lokuli, Romane Colletin2Justina Eyakpobeyan, Prestina Ochonogor, Favour Onyah, Precious Nzeakor

Final Rank Lane Nation Athletes Time Notes7Shanova Douglas, Alliah Baker, Briana Campbell, Alana Reid43.498Timea Rankl, Lia Thalmann, Chloé Rabac, Alicia Masini44.069Savannah Blair, Dianna Proctor, Ashley Odiase, Renée Tedga44.6042Oliwia Zimoląg, Jagoda Żukowska, Inga Kanicka, Julia Adamczyk44.9554Legna Echevarria, Frances Colon, Amanda Andino, Karina Franceschi45.6163Anna Karandukova, Diana Myroshnichenko, Uliana Stepaniuk, Alina Kyshkina45.645Aleksandra Stoilova, Torrie Lewis, Olivia Inkster, Jessica Milat, 6Jade Brown, Cynteria James, Avery Lewis, Taylor Snaer

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