# 2018 FINA World Swimming Championships (25 m) – Women's 100 metre breaststroke

The women's 100 metre breaststroke competition of the 2018 FINA World Swimming Championships (25 m) was held on 14 and 15 December 2018.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Name | Nation | Time | Location | Date |
| World record | Rūta Meilutytė | Lithuania | 1:02.36 | Moscow | 12 October 2013 |
| Championship record | Alia Atkinson | Jamaica | 1:02.36 | Doha | 6 December 2014 |

## Results
### Heats

The heats were started on 14 December at 10:49.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 1 | Katie Meili | United States | 1:03.76 | Q |
| 2 | 6 | 4 | Alia Atkinson | Jamaica | 1:04.34 | Q |
| 3 | 6 | 2 | Martina Carraro | Italy | 1:05.06 | Q |
| 3 | 6 | 6 | Fanny Lecluyse | Belgium | 1:05.06 | Q |
| 5 | 4 | 2 | Shi Jinglin | China | 1:05.24 | Q |
| 5 | 6 | 3 | Arianna Castiglioni | Italy | 1:05.24 | Q |
| 7 | 4 | 3 | Jessica Hansen | Australia | 1:05.33 | Q |
| 8 | 4 | 4 | Jenna Laukkanen | Finland | 1:05.38 | Q |
| 9 | 5 | 7 | Yu Jingyao | China | 1:05.55 | Q |
| 10 | 5 | 6 | Kanako Watanabe | Japan | 1:05.62 | Q |
| 11 | 5 | 5 | Jessica Vall | Spain | 1:05.70 | Q |
| 12 | 5 | 3 | Maria Temnikova | Russia | 1:05.82 | Q |
| 13 | 6 | 5 | Vitalina Simonova | Russia | 1:05.85 | Q |
| 14 | 4 | 0 | Lisa Mamie | Switzerland | 1:05.87 | Q |
| 15 | 5 | 4 | Rūta Meilutytė | Lithuania | 1:06.29 | Q |
| 16 | 5 | 2 | Runa Imai | Japan | 1:06.35 | Q |
| 17 | 4 | 9 | Anna Sztankovics | Hungary | 1:06.42 | |
| 18 | 6 | 7 | Jessica Steiger | Germany | 1:06.47 | |
| 19 | 4 | 6 | Ida Hulkko | Finland | 1:06.55 | |
| 20 | 5 | 1 | Julia Sebastián | Argentina | 1:06.83 | |
| 21 | 4 | 8 | Maria Romanjuk | Estonia | 1:06.90 | |
| 22 | 4 | 7 | Jenna Strauch | Australia | 1:07.16 | |
| 23 | 5 | 0 | Niamh Coyne | Ireland | 1:07.19 | |
| 24 | 5 | 8 | Cornelia Pammer | Austria | 1:07.24 | |
| 25 | 3 | 4 | Viktoriya Zeynep Güneş | Turkey | 1:07.39 | |
| 26 | 3 | 2 | Sophie Angus | Canada | 1:07.53 | |
| 27 | 6 | 0 | Andrea Podmaníková | Slovakia | 1:07.55 | |
| 28 | 3 | 6 | Tatiana Chișca | Moldova | 1:08.21 | |
| 29 | 6 | 9 | Raquel Gomes Pereira | Portugal | 1:08.27 | |
| 30 | 3 | 1 | Mercedes Toledo | Venezuela | 1:08.30 | |
| 31 | 3 | 3 | Kan Cheuk Tung Natalie | Hong Kong | 1:08.52 | |
| 32 | 6 | 8 | Lin Pei-wun | Chinese Taipei | 1:09.01 | |
| 33 | 5 | 9 | Ciara Smith | New Zealand | 1:09.13 | |
| 34 | 3 | 5 | Emily Visagie | South Africa | 1:09.46 | |
| 35 | 3 | 0 | Rebecca Kamau | Kenya | 1:09.47 | |
| 36 | 3 | 7 | Tilka Paljk | Zambia | 1:11.22 | |
| 37 | 2 | 4 | Matelita Buadromo | Fiji | 1:12.57 | |
| 38 | 2 | 5 | Tilali Scanlan | American Samoa | 1:12.72 | |
| 39 | 3 | 9 | Cheang Weng Lam | Macau | 1:13.12 | |
| 40 | 3 | 8 | Anahi Schreuders | Aruba | 1:13.41 | |
| 41 | 2 | 8 | Jang Myong-gyong | North Korea | 1:14.42 | |
| 42 | 1 | 5 | Vorleak Sok | Cambodia | 1:15.37 | |
| 43 | 2 | 3 | Kirsten Fisher-Marsters | Cook Islands | 1:16.44 | |
| 44 | 2 | 6 | Latroya Pina | Cape Verde | 1:16.83 | |
| 45 | 1 | 4 | Nooran Ba Matraf | Yemen | 1:17.08 | |
| 46 | 1 | 3 | Darya Semyonova | Turkmenistan | 1:18.73 | |
| 47 | 2 | 2 | Rehema Kalate | Papua New Guinea | 1:21.48 | |
| 48 | 2 | 1 | Bianca Mitchell | Antigua and Barbuda | 1:21.87 | |
| 49 | 2 | 7 | Lungelo Nxumalo | Eswatini | 1:31.73 | |
| | 4 | 1 | Susann Bjørnsen | Norway | DNS | |
| | 4 | 5 | Molly Hannis | United States | DNS | |

### Semifinals

The semifinals were started on 14 December at 20:42.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Alia Atkinson | Jamaica | 1:04.07 | Q |
| 2 | 5 | Fanny Lecluyse | Belgium | 1:04.82 | Q |
| 3 | 6 | Jenna Laukkanen | Finland | 1:05.01 | Q |
| 4 | 2 | Kanako Watanabe | Japan | 1:05.09 | Q |
| 5 | 7 | Maria Temnikova | Russia | 1:05.52 | |
| 6 | 3 | Arianna Castiglioni | Italy | 1:05.80 | |
| 7 | 8 | Runa Imai | Japan | 1:06.22 | |
| 8 | 1 | Lisa Mamie | Switzerland | 1:06.49 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | Jessica Hansen | Australia | 1:04.11 | Q |
| 2 | 4 | Katie Meili | United States | 1:04.54 | Q |
| 3 | 3 | Shi Jinglin | China | 1:04.73 | Q |
| 4 | 5 | Martina Carraro | Italy | 1:04.87 | Q |
| 5 | 2 | Yu Jingyao | China | 1:05.14 | |
| 6 | 7 | Jessica Vall | Spain | 1:05.27 | |
| 7 | 1 | Vitalina Simonova | Russia | 1:05.54 | |
| 8 | 8 | Rūta Meilutytė | Lithuania | 1:06.16 | |

### Final

The final was held on 15 December at 20:37.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Alia Atkinson | Jamaica | 1:03.51 |
| | 3 | Katie Meili | United States | 1:03.63 |
| | 5 | Jessica Hansen | Australia | 1:04.61 |
| 4 | 7 | Martina Carraro | Italy | 1:04.73 |
| 5 | 1 | Jenna Laukkanen | Finland | 1:04.96 |
| 6 | 6 | Shi Jinglin | China | 1:05.10 |
| 7 | 2 | Fanny Lecluyse | Belgium | 1:05.13 |
| 8 | 8 | Kanako Watanabe | Japan | 1:05.34 |