# 2018 FINA World Swimming Championships (25 m) – Women's 50 metre breaststroke

The women's 50 metre breaststroke competition of the 2018 FINA World Swimming Championships (25 m) was held on 11 and 12 December 2018.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Name | Nation | Time | Location | Date |
| World record | Alia Atkinson | Jamaica | 28.56 | Budapest | 6 October 2018 |
| Championship record | Rūta Meilutytė | Lithuania | 28.81 | Doha | 3 December 2014 |

## Results
### Heats

The heats were started on 11 December at 10:38.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Rūta Meilutytė | Lithuania | 29.56 | Q |
| 2 | 4 | 1 | Katie Meili | United States | 29.94 | Q |
| 3 | 6 | 2 | Martina Carraro | Italy | 30.00 | Q, NR |
| 3 | 6 | 4 | Alia Atkinson | Jamaica | 30.00 | Q |
| 5 | 5 | 5 | Ida Hulkko | Finland | 30.13 | Q |
| 6 | 6 | 5 | Jenna Laukkanen | Finland | 30.19 | Q |
| 7 | 4 | 2 | Miho Teramura | Japan | 30.20 | Q, NR |
| 7 | 4 | 6 | Jessica Hansen | Australia | 30.20 | Q |
| 9 | 5 | 3 | Arianna Castiglioni | Italy | 30.21 | Q |
| 10 | 6 | 6 | Fanny Lecluyse | Belgium | 30.34 | Q |
| 11 | 5 | 7 | Suo Ran | China | 30.42 | Q |
| 12 | 4 | 5 | Emily Seebohm | Australia | 30.46 | Q |
| 13 | 5 | 2 | Petra Chocová | Czech Republic | 30.48 | Q |
| 14 | 5 | 6 | Maria Temnikova | Russia | 30.49 | Q |
| 15 | 4 | 3 | Kim Busch | Netherlands | 30.58 | Q |
| 16 | 6 | 7 | Feng Junyang | China | 30.69 | Q |
| 17 | 6 | 8 | Jessica Steiger | Germany | 30.72 | |
| 18 | 5 | 1 | Anna Sztankovics | Hungary | 30.76 | |
| 19 | 6 | 3 | Susann Bjørnsen | Norway | 30.83 | |
| 20 | 4 | 7 | Jessica Vall | Spain | 30.88 | |
| 21 | 3 | 6 | Adelaida Pchelintseva | Kazakhstan | 30.96 | NR |
| 22 | 5 | 0 | Cornelia Pammer | Austria | 31.00 | |
| 22 | 6 | 9 | Maria Romanjuk | Estonia | 31.00 | |
| 24 | 4 | 9 | Lisa Mamie | Switzerland | 31.04 | NR |
| 24 | 5 | 9 | Tatiana Chișca | Moldova | 31.04 | |
| 26 | 3 | 4 | Jenjira Srisaard | Thailand | 31.15 | |
| 27 | 5 | 8 | Julia Sebastián | Argentina | 31.16 | |
| 28 | 3 | 3 | Mercedes Toledo | Venezuela | 31.19 | NR |
| 29 | 6 | 1 | Vitalina Simonova | Russia | 31.20 | |
| 30 | 4 | 8 | Andrea Podmaníková | Slovakia | 31.34 | |
| 31 | 4 | 0 | Niamh Coyne | Ireland | 31.42 | |
| 32 | 6 | 0 | Lin Pei-wun | Chinese Taipei | 31.56 | |
| 33 | 3 | 5 | Tilka Paljk | Zambia | 31.84 | |
| 34 | 3 | 7 | Victoria Russell | Bahamas | 32.94 | |
| 35 | 3 | 8 | Tilali Scanlan | American Samoa | 33.19 | |
| 36 | 1 | 5 | Jang Myong-gyong | North Korea | 33.35 | |
| 37 | 2 | 8 | María José Ribera | Bolivia | 33.55 | |
| 37 | 3 | 1 | Cheang Weng Lam | Macau | 33.55 | |
| 39 | 3 | 2 | Anahi Schreuders | Aruba | 33.90 | |
| 40 | 3 | 0 | Kirsten Fisher-Marsters | Cook Islands | 34.45 | |
| 41 | 1 | 6 | Vorleak Sok | Cambodia | 34.52 | |
| 42 | 2 | 1 | Darya Semyonova | Turkmenistan | 35.33 | |
| 43 | 1 | 1 | Abiola Ogunbanwo | Nigeria | 35.36 | |
| 44 | 3 | 9 | Rehema Kalate | Papua New Guinea | 36.59 | |
| 45 | 2 | 4 | Taeyanna Adams | Federated States of Micronesia | 37.00 | |
| 46 | 1 | 2 | Angelika Ouedraogo | Burkina Faso | 37.73 | |
| 47 | 1 | 8 | Ayushma Tuladhar | Nepal | 37.91 | |
| 48 | 1 | 4 | Karina Klimyk | Tajikistan | 39.48 | |
| 49 | 2 | 5 | Siri Arun Budcharern | Laos | 40.40 | |
| 50 | 2 | 3 | Lungelo Nxumalo | Eswatini | 41.02 | |
| 51 | 1 | 3 | Nafissath Radji | Benin | 41.13 | |
| 52 | 2 | 2 | Wendy Charles | Solomon Islands | 43.12 | |
| 53 | 1 | 0 | Roukaya Mahamane | Niger | 44.55 | |
| 54 | 2 | 6 | Mariama Touré | Guinea | 44.67 | |
| 55 | 1 | 7 | Kanu Isha | Sierra Leone | 47.89 | |
| | 2 | 0 | Fatoumata Konate | Mali | | DNS |
| | 2 | 7 | Safia Houssein Barkat | Djibouti | | DNS |
| | 4 | 4 | Molly Hannis | United States | | DNS |
| | 2 | 9 | Ida Cham | Gambia | | DSQ |

### Semifinals

The semifinals were started on 11 December at 19:26.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Alia Atkinson | Jamaica | 29.54 | Q |
| 2 | 3 | Jenna Laukkanen | Finland | 29.83 | Q |
| 3 | 4 | Katie Meili | United States | 30.09 | Q |
| 4 | 2 | Fanny Lecluyse | Belgium | 30.15 | Q |
| 5 | 6 | Jessica Hansen | Australia | 30.20 | QSO |
| 6 | 8 | Feng Junyang | China | 30.44 | |
| 7 | 7 | Emily Seebohm | Australia | 30.45 | |
| 8 | 1 | Maria Temnikova | Russia | 30.51 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Martina Carraro | Italy | 29.79 | Q, NR |
| 2 | 4 | Rūta Meilutytė | Lithuania | 29.80 | Q |
| 3 | 3 | Ida Hulkko | Finland | 30.18 | Q |
| 4 | 6 | Miho Teramura | Japan | 30.20 | QSO, = NR |
| 5 | 7 | Suo Ran | China | 30.29 | |
| 6 | 2 | Arianna Castiglioni | Italy | 30.36 | |
| 7 | 1 | Petra Chocová | Czech Republic | 30.42 | |
| 8 | 8 | Kim Busch | Netherlands | 30.79 | |

#### Swim-off

The swim-off was held on 11 December at 21:20.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Jessica Hansen | Australia | 29.96 | Q |
| 2 | 5 | Miho Teramura | Japan | 30.14 | NR |

### Final

The final was held on 12 December at 19:41.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Alia Atkinson | Jamaica | 29.05 | |
| | 3 | Rūta Meilutytė | Lithuania | 29.38 | |
| | 5 | Martina Carraro | Italy | 29.59 | NR |
| 4 | 6 | Jenna Laukkanen | Finland | 29.68 | |
| 5 | 2 | Katie Meili | United States | 29.89 | |
| 6 | 8 | Jessica Hansen | Australia | 30.20 | |
| 7 | 7 | Fanny Lecluyse | Belgium | 30.41 | |
| 8 | 1 | Ida Hulkko | Finland | 30.45 | |