The women's 100 metre backstroke event at the 2024 World Aquatics Swimming Championships (25 m) was held from 10 to 11 December 2024 at the Duna Arena in Budapest, Hungary.

Records Prior to the competition, the existing world and championship records were as follows.

The following record was established during the competition: Date Event Name Nationality Time Record 11 December Final Regan Smith 54.55 CR

Results Heats The heats were started on 10 December at 9:32.

Rank Heat Lane Name Nationality Time Notes 1 7 4 Regan Smith 55.86 Q 2 6 4 Iona Anderson 56.25 Q 3 6 2 Katharine Berkoff 56.33 Q 4 6 5 Anastasiya Shkurdai Neutral Athletes A 56.50 Q 5 6 7 Kylie Masse 56.58 Q 6 7 5 Ingrid Wilm 56.66 Q 7 6 0 Carmen Weiler 56.68 Q, NR 8 5 5 Qian Xinan 56.69 Q 9 6 9 Miranda Grana Neutral Athletes C 56.83 Q, NR 10 6 3 Maaike de Waard 57.01 Q 11 5 3 Louise Hansson 57.14 Q 12 7 3 Pauline Mahieu 57.18 Q 13 6 6 Hanna Rosvall 57.26 Q 14 7 6 Mizuki Hirai 57.29 Q 15 5 2 Helena Gasson 57.43 Q 16 5 6 Zheng Huiyu 57.52 Q 17 5 4 Kira Toussaint 57.55 R 18 7 7 Giulia D'Innocenzo 57.82 R 19 7 2 Danielle Hill 57.95 20 5 7 Elizaveta Agapitova Neutral Athletes B 58.19 21 5 0 Adela Piskorska 58.31 22 7 1 Milana Stepanova Neutral Athletes B 58.47 23 4 4 Xeniya Ignatova 59.01 24 7 0 Gabriela Georgieva 59.06 25 4 5 Fanny Teijonsalo 59.27 26 6 8 Milla Drakopoulos 59.33 27 5 1 Dora Molnar 59.37 28 6 1 Aissia Prisecariu 59.39 29 4 1 Abril Aunchayna 59.56 NR 29 4 3 Justine Murdock 59.56 NR 31 7 9 Chloe Isleta 59.71 32 5 8 Cindy Cheung 59.89 33 7 8 Kim Seung-won 59.95 34 4 6 Carla González 35 4 2 Zuri Ferguson NR 36 3 7 Masniari Wolf NR 37 3 5 Teresa Ivan 38 3 4 Elizabeth Jiménez 39 4 0 Laurent Estrada 40 5 9 Nika Sharafutdinova 41 2 4 Jessica Humphrey 42 4 9 Melissa Diego NR 43 4 8 Danielle Titus 44 3 6 Logan Watson-Brown 45 3 2 Elisabeth Erlendsdóttir 46 2 7 Ashley Calderón NR 47 2 5 Lara Giménez NR 48 3 1 Anishta Teeluck 49 3 3 Natalia Zaiteva 50 2 3 Taline Mourad NR 51 2 2 Leanna Wainwright NR 52 3 8 Ganga Senavirathne 53 4 7 Enkh-Amgalangiin Ariuntamir 54 3 0 Wong Un Iao 55 3 9 Mia Laban 56 2 6 Idealy Tendrinavalona NR 57 2 8 Aaliyah Palestrini 58 2 1 Nubia Adjei 59 1 3 Piper Raho 60 1 5 Juthi Akter NR 61 2 0 Ammara Pinto 62 1 4 Aliyana Kachra 63 2 9 Chloe Ameara

Semifinals The semifinals were started on 10 December at 18:24. Rank Heat Lane Name Nationality Time Notes 1 2 4 Regan Smith 55.05 Q 2 2 5 Katharine Berkoff 55.37 Q 3 1 3 Ingrid Wilm 55.85 Q 4 1 4 Iona Anderson 55.99 Q 5 2 3 Kylie Masse 56.06 Q 6 1 5 Anastasiya Shkurdai Neutral Athletes A 56.07 Q, NR 7 2 6 Carmen Weiler 56.09 Q, NR 8 2 7 Louise Hansson 56.17 Q 9 1 7 Pauline Mahieu 56.36 R 10 2 2 Miranda Grana Neutral Athletes C 56.62 R, NR 11 1 6 Qian Xinan 56.79 12 1 2 Maaike de Waard 56.94 13 2 1 Hanna Rosvall 57.24 14 1 1 Mizuki Hirai 57.44 15 2 8 Helena Gasson 57.64 16 1 8 Zheng Huiyu 58.07

Final The final was held on 11 December at 17:32. Rank Lane Name Nationality Time Notes 4 Regan Smith 54.55 CR 5 Katharine Berkoff 54.93 3 Ingrid Wilm 55.75 4 6 Iona Anderson 56.08 5 7 Anastasiya Shkurdai Neutral Athletes A 56.11 6 2 Kylie Masse 56.21 7 1 Carmen Weiler 56.39 8 8 Louise Hansson 56.52

References