The women's 100 metre freestyle competition at the 2023 World Aquatics Championships was held on 27 and 28 July 2023.

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

Results Heats The heats were started on 27 July at 10:32.

Rank Heat Lane Name Nationality Time Notes 1 7 4 Siobhán Haughey 53.15 Q 2 8 5 Abbey Weitzeil 53.25 Q 3 6 4 Emma McKeon 53.40 Q 4 7 3 Marie Wattel 53.59 Q 5 6 2 Michelle Coleman 53.72 Q 6 6 5 Marrit Steenbergen 53.82 Q 7 8 4 Mollie O'Callaghan 54.01 Q 8 8 3 Cheng Yujie 54.11 Q 9 6 6 Stephanie Balduccini 54.15 Q 10 6 3 Beryl Gastaldello 54.16 Q 11 8 5 Kate Douglass 54.41 Q 12 8 6 Yang Junxuan 54.45 Q 13 7 8 Sofia Morini 54.50 Q 14 6 1 Aimee Canny 54.60 Q 15 8 2 Signe Bro 54.61 Q 16 7 6 Rikako Ikee 54.67 Q 17 6 8 Snæfríður Jórunnardóttir 54.74 NR 17 7 2 Kalia Antoniou 54.74 19 6 7 Kornelia Fiedkiewicz 54.82 20 8 8 Hur Yeon-kyung 54.97 21 7 1 Barbora Seemanová 55.04 22 8 7 Janja Šegel 55.17 23 5 5 Jillian Crooks 55.32 NR 24 6 0 Elisbet Gámez 55.40 25 7 0 Carmen Weiler Sastre 55.46 26 8 0 Victoria Catterson 55.56 27 5 3 Anicka Delgado 55.57 28 8 1 Roos Vanotterdijk 55.89 29 8 9 Chelsey Edwards 56.04 30 5 4 Teresa Ivan 56.16 31 6 9 Quah Ting Wen 56.52 32 7 9 Nina Kost 56.60 33 5 2 Inés Marín 56.90 NR 34 4 5 Elisabeth Timmer 57.86 35 5 6 Maddy Moore 58.01 36 5 7 Mia Blaževska Eminova 58.05 37 5 9 Ani Poghosyan 58.80 38 4 2 Zaylie Thompson 58.86 39 1 9 Maria Brunlehner Suspended Member Federation 59.00 40 5 1 Maxine Egner 59.02 41 4 3 Adriana Giles 59.17 42 4 4 Mya Azzopardi 59.27 43 5 8 Sabrina Lyn 59.38 44 4 7 Kirabo Namutebi 59.50 45 4 8 Tilly Collymore 59.85 46 4 1 Paige van der Westhuizen 47 4 6 Mariel Mencia 48 5 0 Isabella Alas 49 4 0 Aleka Persaud NR 50 3 2 Aunjelique Liddie 51 3 3 Georgia-Leigh Vele 52 1 0 Asma Lefalher 53 4 9 Jehanara Nabi NR 54 3 4 Mariam Mithqal 54 3 8 Mia Lee 56 3 5 Dorcas Abeng 57 1 1 Katie Rock 58 3 0 Makelyta Singsombath 59 3 9 Duana Lama 60 3 6 Kaiya Brown 61 1 8 Mya de Freitas 62 3 7 Jovana Kuljaca 63 1 4 Hayley Wong 64 2 4 Charissa Panuve 65 3 1 Anastasiya Morginshtern 66 1 7 Sophia Latiff 67 2 5 Saba Sultan 68 2 3 Tayamika Chang'Anamuno 69 1 6 Mashael Al-Ayed 70 2 1 Simanga Dlamini 71 2 7 Rana Saadeldin 72 1 3 Kayla Hepler 73 2 9 Loane Russet 74 2 2 Yuri Hosei 75 2 6 Iman Kouraogo 76 1 5 Alia Ishimwe 77 2 8 Imelda Ximenes 1 2 Mariama Sow 2 0 Abbi Illis 7 7 Petra Senánszky

Swim-off The swim-off to determine the first reserve was held on 27 July at 12:05.

Rank Lane Name Nationality Time Notes 1 4 Snæfríður Jórunnardóttir 54.87 2 5 Kalia Antoniou 55.07

Semifinals The semifinals were held on 27 July at 20:11.

Rank Heat Lane Name Nationality Time Notes 1 1 3 Marrit Steenbergen 52.82 Q 2 2 6 Mollie O'Callaghan 52.86 Q 3 2 4 Siobhán Haughey 52.90 Q 4 2 5 Emma McKeon 53.00 Q 5 1 4 Abbey Weitzeil 53.36 Q 6 2 7 Kate Douglass 53.38 Q 7 2 3 Michelle Coleman 53.41 Q 8 1 7 Yang Junxuan 53.67 Q 9 1 5 Marie Wattel 53.83 10 1 6 Cheng Yujie 53.92 11 2 8 Signe Bro 53.94 12 1 2 Beryl Gastaldello 54.49 13 2 2 Stephanie Balduccini 54.69 14 2 1 Sofia Morini 54.72 15 1 8 Rikako Ikee 54.86 16 1 1 Aimee Canny 54.87

Final The final was started on 28 July at 20:02.

Rank Lane Name Nationality Time Notes 5 Mollie O'Callaghan 52.16 3 Siobhán Haughey 52.49 4 Marrit Steenbergen 52.71 4 7 Kate Douglass 52.81 5 6 Emma McKeon 52.83 6 2 Abbey Weitzeil 53.34 7 1 Michelle Coleman 53.83 8 8 Yang Junxuan 54.09

References