The women's 100 metre backstroke competition at the 2023 World Aquatics Championships was held on 24 and 25 July 2023.

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

The following new records were set during this competition. Date Event Name Nationality Time Record 25 July Final Kaylee McKeown 57.53 CR

Results Heats The heats were started on 24 July at 10:32.

Rank Heat Lane Name Nationality Time Notes 1 6 4 Regan Smith Q 2 7 4 Kaylee McKeown Q 3 5 4 Katharine Berkoff Q 4 7 5 Kylie Masse Q 5 6 3 Wan Letian Q 6 7 2 Pauline Mahieu Q 7 6 6 Maaike de Waard Q 8 5 5 Wang Xueer Q 9 6 5 Ingrid Wilm Q 10 5 7 Madison Wilson 1:00.04 Q 11 6 1 Lauren Cox 1:00.10 Q 12 7 6 Medi Harris 1:00.11 Q 13 5 3 Margherita Panziera 1:00.40 Q 14 5 1 Simona Kubová 1:00.45 Q 15 7 0 Hanna Rosvall 1:00.46 Q 15 7 3 Kira Toussaint 1:00.46 Q 17 5 2 Adela Piskorska 1:00.51 18 6 8 Lee Eun-ji 1:00.56 19 4 4 Helena Gasson 1:00.83 19 7 1 Rio Shirai 1:00.83 21 7 7 Carmen Weiler 1:00.87 22 5 6 Roos Vanotterdijk 1:00.95 23 7 9 Stephanie Au 1:01.08 24 6 0 Camila Rebelo 1:01.27 25 5 8 Ingeborg Løyning 1:01.32 26 6 2 Paulina Peda 1:01.40 27 7 8 Danielle Hill 1:01.51 28 4 3 Aviv Barzelay 1:01.66 28 4 6 Gabriela Georgieva 1:01.66 30 6 7 Analia Pigrée 1:01.67 31 6 9 Nina Kost 1:02.03 32 4 1 Xeniya Ignatova 1:02.34 32 4 5 Andrea Berrino 1:02.34 34 5 0 Dóra Molnár 1:02.62 35 4 8 Milla Drakopoulos 1:02.77 36 4 7 Julia Góes 1:02.87 37 5 9 Miranda Grana 1:02.91 38 3 4 McKenna DeBever 1:03.12 39 4 9 Emma Harvey 1:03.14 40 4 2 Tatiana Salcuțan 1:03.18 41 3 5 Elizabeth Jiménez 1:03.45 42 3 1 Andrea Becali 1:04.27 43 3 6 Danielle Titus 1:04.40 44 3 3 Saovanee Boonamphai 1:04.53 45 4 0 Abril Aunchayna 1:04.66 46 3 2 Carolina Cermelli 1:04.85 46 3 8 Donata Katai 1:04.85 48 3 0 Ganga Malwaththage 1:04.86 49 3 7 Anishta Teeluck 1:05.32 50 1 3 Felicity Passon 1:05.35 51 1 4 Gaurika Singh 1:06.80 52 3 9 Eda Zeqiri 1:07.17 53 2 5 Ariuntamir Enkh-Amgalan 1:08.59 NR 54 2 1 Cheang Weng Lam 1:08.60 55 2 4 Aynura Primova 1:08.97 56 2 8 Idealy Tendrinavalona 1:10.29 57 2 3 Chanchakriya Kheun 1:10.51 58 2 6 Jennifer Harding-Marlin 1:12.19 59 1 5 Abigail Ai Tom 1:14.69 60 2 2 Hamna Ahmed 1:18.17 NR 61 2 7 Ammara Pinto 1:22.06

Semifinals The semifinals were started on 24 July at 20:53.

Rank Heat Lane Name Nationality Time Notes 1 2 4 Regan Smith 58.33 Q 2 1 4 Kaylee McKeown 58.48 Q 3 2 5 Katharine Berkoff 58.60 Q 4 1 5 Kylie Masse 59.06 Q 5 1 3 Pauline Mahieu 59.30 Q, NR 6 2 2 Ingrid Wilm 59.35 Q 7 2 3 Wan Letian 59.49 Q 8 1 7 Medi Harris 59.62 Q 9 1 2 Madison Wilson 59.63 10 2 7 Lauren Cox 59.79 11 2 6 Maaike de Waard 59.84 12 1 8 Kira Toussaint 59.89 13 1 6 Wang Xueer 59.96 14 1 1 Simona Kubová 15 2 8 Hanna Rosvall 16 2 1 Margherita Panziera

Final The final was held on 25 July at 20:51.

Rank Lane Name Nationality Time Notes 5 Kaylee McKeown 57.53 CR 4 Regan Smith 57.78 3 Katharine Berkoff 58.25 4 6 Kylie Masse 59.09 5 7 Ingrid Wilm 59.31 6 2 Pauline Mahieu 59.72 7 8 Medi Harris 59.84 8 1 Wan Letian

References