# Swimming at the 2023 World Aquatics Championships – Women's 100 metre breaststroke

The women's 100-metre breaststroke 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.
| World record | Lilly King (USA) | 1:04.13 | Budapest, Hungary | 25 July 2017 |
| Competition record | Lilly King (USA) | 1:04.13 | Budapest, Hungary | 25 July 2017 |

## Results
### Heats

The heats were started on 24 July at 11:09.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 6 | Rūta Meilutytė | Lithuania | 1:04.67 | Q |
| 2 | 5 | 6 | Mona McSharry | Ireland | 1:05.55 | Q, NR |
| 3 | 6 | 3 | Tatjana Schoenmaker | South Africa | 1:05.56 | Q |
| 4 | 6 | 4 | Lilly King | United States | 1:05.93 | Q |
| 5 | 4 | 7 | Satomi Suzuki | Japan | 1:06.20 | Q |
| 6 | 4 | 3 | Lisa Angiolini | Italy | 1:06.28 | Q |
| 7 | 5 | 1 | Dominika Sztandera | Poland | 1:06.42 | Q, NR |
| 8 | 4 | 5 | Tes Schouten | Netherlands | 1:06.46 | Q |
| 9 | 6 | 2 | Eneli Jefimova | Estonia | 1:06.54 | Q |
| 10 | 4 | 4 | Reona Aoki | Japan | 1:06.61 | Q |
| 11 | 5 | 2 | Martina Carraro | Italy | 1:06.63 | Q |
| 12 | 4 | 6 | Sophie Hansson | Sweden | 1:06.69 | Q |
| 12 | 6 | 8 | Macarena Ceballos | Argentina | 1:06.69 | Q, SA |
| 14 | 5 | 4 | Lydia Jacoby | United States | 1:06.71 | Q |
| 15 | 6 | 1 | Abbey Harkin | Australia | 1:06.86 | Q |
| 16 | 4 | 8 | Lisa Mamié | Switzerland | 1:06.87 | Q |
| 17 | 4 | 2 | Kotryna Teterevkova | Lithuania | 1:06.96 | |
| 18 | 6 | 5 | Lara van Niekerk | South Africa | 1:07.03 | |
| 19 | 5 | 5 | Anna Elendt | Germany | 1:07.09 | |
| 20 | 5 | 3 | Tang Qianting | China | 1:07.15 | |
| 21 | 5 | 8 | Yang Chang | China | 1:07.28 | |
| 22 | 6 | 0 | Sophie Angus | Canada | 1:07.34 | |
| 23 | 5 | 7 | Kara Hanlon | Great Britain | 1:07.52 | |
| 24 | 4 | 9 | Ida Hulkko | Finland | 1:07.58 | |
| 25 | 5 | 9 | Sim En Yi Letitia | Singapore | 1:07.65 | |
| 26 | 5 | 0 | Thea Blomsterberg | Denmark | 1:08.08 | |
| 27 | 4 | 0 | Florine Gaspard | Belgium | 1:08.34 | |
| 28 | 6 | 9 | Jessica Vall | Spain | 1:08.64 | |
| 29 | 6 | 7 | Anastasia Gorbenko | Israel | 1:08.66 | |
| 30 | 3 | 7 | Ana Blažević | Croatia | 1:08.70 | |
| 31 | 4 | 1 | Jhennifer Conceição | Brazil | 1:08.79 | |
| 32 | 3 | 1 | Stefanía Gómez | Colombia | 1:09.11 | |
| 33 | 3 | 3 | Melissa Rodríguez | Mexico | 1:09.16 | |
| 34 | 3 | 2 | Andrea Podmaníková | Slovakia | 1:09.39 | |
| 35 | 3 | 6 | Tara Vovk | Slovenia | 1:09.68 | |
| 36 | 3 | 5 | Lin Pei-wun | Chinese Taipei | 1:09.72 | |
| 37 | 3 | 4 | Ana Rodrigues | Portugal | 1:09.97 | |
| 38 | 2 | 4 | Mercedes Toledo | Venezuela | 1:10.37 | |
| 39 | 2 | 3 | Emily Santos | Panama | 1:10.57 | |
| 40 | 3 | 8 | Maria-Thaleia Drasidou | Greece | 1:10.67 | |
| 41 | 1 | 1 | Chen Pui Lam | Macau | 1:11.11 | |
| 42 | 3 | 0 | Adelaida Pchelintseva | Kazakhstan | 1:11.41 | |
| 43 | 2 | 7 | Lynn El Hajj | Lebanon | 1:11.57 | NR |
| 44 | 2 | 5 | Phiangkhwan Pawapotako | Thailand | 1:11.78 | |
| 45 | 2 | 6 | Thanya Dela Cruz | Suspended Member Federation | 1:11.79 | |
| 46 | 3 | 9 | Lam Hoi Kiu | Hong Kong | 1:12.62 | |
| 47 | 2 | 1 | Imane El Barodi | Morocco | 1:13.83 | |
| 48 | 2 | 2 | Nadia Tudo Cubells | Andorra | 1:13.89 | |
| 49 | 2 | 0 | Valerie Tarazi | Palestine | 1:13.95 | |
| 50 | 2 | 9 | Jayla Pina | Cape Verde | 1:14.09 | NR |
| 51 | 1 | 6 | Aminata Barrow | Gambia | 1:14.32 | NR |
| 52 | 2 | 8 | Ramudi Samarakoon | Sri Lanka | 1:15.36 | |
| 53 | 1 | 4 | Kelera Mudunasoko | Fiji | 1:15.77 | |
| 54 | 1 | 2 | Tara Aloul | Jordan | 1:16.45 | |
| 55 | 1 | 5 | Lara Dashti | Kuwait | 1:19.29 | |
| 56 | 1 | 7 | Taeyanna Adams | Micronesia | 1:25.99 | |
| 57 | 1 | 3 | Mariama Touré | Guinea | 1:35.41 | NR |

### Semi-finals

The semi-finals were started on 24 July at 20:28.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Rūta Meilutytė | Lithuania | 1:05.09 | Q |
| 2 | 1 | 5 | Lilly King | United States | 1:05.45 | Q |
| 3 | 2 | 5 | Tatjana Schoenmaker | South Africa | 1:05.53 | Q |
| 4 | 1 | 4 | Mona McSharry | Ireland | 1:05.96 | Q |
| 5 | 2 | 2 | Eneli Jefimova | Estonia | 1:06.18 | Q, NR |
| 6 | 1 | 7 | Sophie Hansson | Sweden | 1:06.19 | Q |
| 7 | 1 | 1 | Lydia Jacoby | United States | 1:06.29 | Q |
| 8 | 2 | 3 | Satomi Suzuki | Japan | 1:06.31 | Q |
| 9 | 1 | 2 | Reona Aoki | Japan | 1:06.32 | |
| 10 | 1 | 6 | Tes Schouten | Netherlands | 1:06.53 | |
| 11 | 2 | 7 | Martina Carraro | Italy | 1:06.56 | |
| 12 | 2 | 1 | Macarena Ceballos | Argentina | 1:06.75 | |
| 13 | 1 | 8 | Lisa Mamié | Switzerland | 1:06.97 | |
| 14 | 1 | 3 | Lisa Angiolini | Italy | 1:07.03 | |
| 15 | 2 | 8 | Abbey Harkin | Australia | 1:07.11 | |
| 16 | 2 | 6 | Dominika Sztandera | Poland | 1:07.13 | |

### Final

The final was held on 25 July at 21:45.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Rūta Meilutytė | Lithuania | 1:04.62 |
| | 3 | Tatjana Schoenmaker | South Africa | 1:05.84 |
| | 1 | Lydia Jacoby | United States | 1:05.94 |
| 4 | 5 | Lilly King | United States | 1:06.02 |
| 5 | 6 | Mona McSharry | Ireland | 1:06.07 |
| 6 | 2 | Eneli Jefimova | Estonia | 1:06.36 |
| 7 | 7 | Sophie Hansson | Sweden | 1:06.61 |
| 8 | 8 | Satomi Suzuki | Japan | 1:06.67 |