# Swimming at the 2023 World Aquatics Championships – Women's 50 metre breaststroke

The women's 50 metre breaststroke competition at the 2023 World Aquatics Championships was held on 29 and 30 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows:
| World record | Benedetta Pilato (ITA) | 29.30 | Budapest, Hungary | 22 May 2021 |
| Competition record | Lilly King (USA) | 29.40 | Budapest, Hungary | 30 July 2017 |
The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
| 29 July | Semifinal 2 | Rūta Meilutytė | Lithuania | 29.30 | =WR |
| 30 July | Final | Rūta Meilutytė | Lithuania | 29.16 | WR |

## Results
### Heats

The heats were started on 29 July at 11:10.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Benedetta Pilato | Italy | 29.60 | Q |
| 2 | 6 | 1 | Anita Bottazzo | Italy | 30.02 | Q |
| 3 | 6 | 5 | Lilly King | United States | 30.05 | Q |
| 4 | 5 | 3 | Tang Qianting | China | 30.08 | Q, AS |
| 5 | 6 | 2 | Satomi Suzuki | Japan | 30.29 | Q |
| 6 | 5 | 6 | Veera Kivirinta | Finland | 30.33 | Q |
| 6 | 6 | 3 | Anna Elendt | Germany | 30.33 | Q |
| 8 | 4 | 5 | Eneli Jefimova | Estonia | 30.39 | Q |
| 8 | 6 | 4 | Rūta Meilutytė | Lithuania | 30.39 | Q |
| 8 | 6 | 7 | Sophie Hansson | Sweden | 30.39 | Q |
| 11 | 5 | 5 | Lydia Jacoby | United States | 30.44 | Q |
| 12 | 6 | 6 | Mona McSharry | Ireland | 30.45 | Q |
| 13 | 5 | 7 | Dominika Sztandera | Poland | 30.68 | Q |
| 14 | 4 | 6 | Tatjana Schoenmaker | South Africa | 30.70 | Q-->WD |
| 15 | 4 | 7 | Fleur Vermeiren | Belgium | 30.73 | Q |
| 16 | 4 | 2 | Florine Gaspard | Belgium | 30.75 | Q |
| 17 | 4 | 4 | Lara van Niekerk | South Africa | 30.76 | Q |
| 18 | 5 | 8 | Yang Chang | China | 30.85 | |
| 19 | 6 | 8 | Kotryna Teterevkova | Lithuania | 30.94 | |
| 20 | 6 | 0 | Macarena Ceballos | Argentina | 30.97 | |
| 21 | 4 | 1 | Ida Hulkko | Finland | 30.98 | |
| 22 | 4 | 0 | Sophie Angus | Canada | 31.01 | |
| 23 | 4 | 3 | Jhennifer Alves | Brazil | 31.04 | |
| 24 | 3 | 4 | Sim En Yi Letitia | Singapore | 31.33 | |
| 25 | 5 | 2 | Anastasia Gorbenko | Israel | 31.41 | |
| 26 | 3 | 2 | Andrea Podmanikova | Slovakia | 31.43 | NR |
| 27 | 5 | 1 | Maria Drasidou | Greece | 31.44 | |
| 28 | 3 | 3 | Adelaida Pchelintseva | Kazakhstan | 31.61 | |
| 29 | 6 | 9 | Abbey Harkin | Australia | 31.63 | |
| 30 | 3 | 5 | Lisa Mamie | Switzerland | 31.67 | |
| 31 | 5 | 0 | Tara Vovk | Slovenia | 31.97 | |
| 32 | 3 | 7 | Mercedes Toledo | Venezuela | 32.00 | |
| 33 | 5 | 9 | Jenjira Srisa-Ard | Thailand | 32.02 | |
| 34 | 3 | 6 | Melissa Rodríguez | Mexico | 32.05 | |
| 35 | 3 | 8 | Emily Santos | Panama | 32.23 | NR |
| 36 | 4 | 9 | Thanya Dela Cruz | Suspended Member Federation | 32.25 | |
| 37 | 1 | 3 | Chen Pui Lam | Macau | 32.31 | NR |
| 38 | 3 | 0 | Imane El Barodi | Morocco | 32.64 | |
| 39 | 3 | 9 | Lynn El Hajj | Lebanon | 33.10 | NR |
| 40 | 2 | 4 | Marina Abu Shamaleh | Palestine | 34.86 | |
| 41 | 2 | 5 | Lara Dashti | Kuwait | 35.44 | NR |
| 42 | 2 | 6 | Maria Batallones | Northern Mariana Islands | 35.96 | |
| 43 | 2 | 2 | Kestra Kihleng | Micronesia | 36.55 | |
| 44 | 2 | 3 | Makelyta Singsombath | Laos | 36.83 | |
| 45 | 2 | 9 | La Troya Pina | Cape Verde | 38.14 | |
| 46 | 2 | 0 | Ria Save | Tanzania | 40.30 | |
| 47 | 2 | 7 | Mariama Touré | Guinea | 41.81 | |
| 48 | 1 | 5 | Estelle Nguelo'o Noubissi | Cameroon | 43.59 | |
| 49 | 1 | 6 | Salima Ahmadou Youssoufou | Niger | 45.97 | NR |
| 50 | 2 | 8 | Nina Amison | Djibouti | 49.61 | |
| | 1 | 2 | Olamide Sam | Sierra Leone | DSQ | DSQ |
| | 1 | 4 | Dorcas Oka | Nigeria | DSQ | DSQ |
| | 3 | 1 | Lam Hoi Kiu | Hong Kong | DSQ | DSQ |
| | 2 | 1 | Abbi Illis | Sint Maarten | Did not start | Did not start |
| | 4 | 8 | Ana Pinho Rodrigues | Portugal | Did not start | Did not start |

### Semifinals

The semifinals were held on 29 July at 20:26.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 2 | Rūta Meilutytė | Lithuania | 29.30 | Q, =WR |
| 2 | 2 | 5 | Lilly King | United States | 29.72 | Q |
| 3 | 1 | 8 | Lara van Niekerk | South Africa | 29.91 | Q |
| 4 | 2 | 4 | Benedetta Pilato | Italy | 30.09 | Q |
| 5 | 1 | 5 | Tang Qianting | China | 30.12 | Q |
| 6 | 1 | 6 | Eneli Jefimova | Estonia | 30.22 | Q |
| 7 | 1 | 4 | Anita Bottazzo | Italy | 30.29 | Q |
| 8 | 2 | 3 | Satomi Suzuki | Japan | 30.33 | Q |
| 9 | 1 | 2 | Sophie Hansson | Sweden | 30.40 | SO |
| 9 | 2 | 7 | Lydia Jacoby | United States | 30.40 | SO |
| 11 | 1 | 7 | Mona McSharry | Ireland | 30.54 | |
| 12 | 2 | 6 | Anna Elendt | Germany | 30.55 | |
| 13 | 1 | 3 | Veera Kivirinta | Finland | 30.56 | |
| 14 | 2 | 1 | Dominika Sztandera | Poland | 30.59 | NR |
| 15 | 2 | 8 | Florine Gaspard | Belgium | 30.67 | |
| 16 | 1 | 1 | Fleur Vermeiren | Belgium | 31.26 | |

#### Swim-off

The swim-off for the first replacement was held on 29 July at 22:13.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Sophie Hansson | Sweden | 30.44 | R1 |
| 2 | 5 | Lydia Jacoby | United States | 30.67 | R2 |

### Final

The final started on 30 July at 20:09.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Rūta Meilutytė | Lithuania | 29.16 | WR |
| | 5 | Lilly King | United States | 29.94 | |
| | 6 | Benedetta Pilato | Italy | 30.04 | |
| 4 | 3 | Lara van Niekerk | South Africa | 30.09 | |
| 5 | 1 | Anita Bottazzo | Italy | 30.11 | |
| 6 | 2 | Tang Qianting | China | 30.22 | |
| 7 | 8 | Satomi Suzuki | Japan | 30.44 | |
| 8 | 7 | Eneli Jefimova | Estonia | 30.48 | |