# Swimming at the 2015 World Aquatics Championships – Women's 100 metre breaststroke

The Women's 100 metre breaststroke competition of the swimming events at the 2015 World Aquatics Championships was held on 3 August with the heats and the semifinals and 4 August with the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Rūta Meilutytė (LTU) | 1:04.35 | Barcelona, Spain | 29 July 2013 |
| Competition record | Rūta Meilutytė (LTU) | 1:04.35 | Barcelona, Spain | 29 July 2013 |

## Results
### Heats

The heats were held on 3 August at 10:07.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Yuliya Yefimova | Russia | 1:06.31 | Q |
| 2 | 6 | 3 | Shi Jinglin | China | 1:06.45 | Q |
| 3 | 6 | 5 | Jessica Hardy | United States | 1:06.68 | Q |
| 4 | 7 | 4 | Rūta Meilutytė | Lithuania | 1:06.75 | Q |
| 5 | 7 | 5 | Kanako Watanabe | Japan | 1:06.81 | Q |
| 6 | 7 | 9 | Hrafnhildur Lúthersdóttir | Iceland | 1:06.87 | Q, NR |
| 7 | 7 | 6 | Taylor McKeown | Australia | 1:06.97 | Q |
| 8 | 5 | 3 | Jennie Johansson | Sweden | 1:07.09 | Q |
| 8 | 7 | 3 | Alia Atkinson | Jamaica | 1:07.09 | Q |
| 10 | 5 | 2 | Jessica Vall | Spain | 1:07.13 | Q |
| 11 | 6 | 8 | Fanny Lecluyse | Belgium | 1:07.29 | Q, NR |
| 12 | 6 | 2 | Lorna Tonks | Australia | 1:07.32 | Q |
| 13 | 5 | 4 | Rikke Møller Pedersen | Denmark | 1:07.39 | Q |
| 14 | 5 | 9 | Rachel Nicol | Canada | 1:07.52 | Q |
| 14 | 6 | 6 | Arianna Castiglioni | Italy | 1:07.52 | Q |
| 16 | 5 | 8 | Jenna Laukkanen | Finland | 1:07.58 | Q, NR |
| 17 | 6 | 7 | Viktoriya Zeynep Gunes | Turkey | 1:07.60 | |
| 18 | 7 | 7 | Rie Kaneto | Japan | 1:07.71 | |
| 19 | 5 | 5 | Micah Lawrence | United States | 1:07.73 | |
| 20 | 5 | 6 | Fiona Doyle | Ireland | 1:07.81 | |
| 21 | 4 | 5 | Kierra Smith | Canada | 1:07.88 | |
| 22 | 5 | 1 | Marina García Urzainqui | Spain | 1:07.97 | |
| 23 | 6 | 9 | Vanessa Grimberg | Germany | 1:08.04 | |
| 24 | 7 | 1 | Petra Chocová | Czech Republic | 1:08.09 | |
| 25 | 6 | 1 | Ilaria Scarcella | Italy | 1:08.13 | |
| 26 | 5 | 7 | Maria Astashkina | Russia | 1:08.27 | |
| 26 | 7 | 2 | Moniek Nijhuis | Netherlands | 1:08.27 | |
| 28 | 7 | 8 | Amit Ivry | Israel | 1:09.08 | |
| 29 | 7 | 0 | Mariya Liver | Ukraine | 1:09.10 | |
| 30 | 5 | 0 | He Yun | China | 1:09.17 | |
| 31 | 6 | 0 | Tjaša Vozel | Slovenia | 1:09.27 | |
| 32 | 4 | 3 | Anna Sztankovics | Hungary | 1:09.34 | |
| 33 | 4 | 8 | Dominika Sztandera | Poland | 1:09.38 | |
| 34 | 3 | 9 | Maria Romanjuk | Estonia | 1:09.49 | NR |
| 35 | 4 | 2 | Julia Sebastian | Argentina | 1:09.71 | |
| 36 | 4 | 6 | Jhennifer Conceição | Brazil | 1:10.14 | |
| 37 | 4 | 7 | Jung Seul-ki | South Korea | 1:10.19 | |
| 38 | 3 | 5 | Aikaterini Sarakatsani | Greece | 1:10.68 | |
| 39 | 3 | 1 | Mercedes Toledo | Venezuela | 1:10.70 | |
| 39 | 4 | 1 | Fanny Deberghes | France | 1:10.70 | |
| 41 | 4 | 9 | Ana Radić | Croatia | 1:10.83 | |
| 42 | 2 | 4 | Daniela Carrillo | Mexico | 1:11.22 | |
| 43 | 4 | 0 | Alina Zmushka | Belarus | 1:11.39 | |
| 44 | 3 | 4 | Aļona Ribakova | Latvia | 1:11.45 | |
| 45 | 3 | 7 | Yvette Kong | Hong Kong | 1:11.46 | |
| 46 | 3 | 2 | Phee Jinq En | Malaysia | 1:11.76 | |
| 47 | 3 | 0 | Daniela Lindemeier | Namibia | 1:12.07 | |
| 48 | 4 | 4 | Anastasiya Malyavina | Ukraine | 1:12.77 | |
| 49 | 3 | 6 | Dariya Talanova | Kyrgyzstan | 1:13.68 | |
| 50 | 3 | 8 | Alexandra Vinicenco | Moldova | 1:13.88 | |
| 51 | 3 | 3 | Sin Jin-hui | North Korea | 1:14.52 | |
| 52 | 2 | 5 | Lei On Kei | Macau | 1:15.17 | |
| 53 | 2 | 7 | Amy Micallef | Malta | 1:16.02 | |
| 54 | 2 | 0 | Barbara Vali-Skelton | Papua New Guinea | 1:16.85 | |
| 55 | 2 | 8 | Tilka Paljk | Zambia | 1:17.13 | |
| 56 | 2 | 3 | Jamila Lunkuse | Uganda | 1:17.23 | |
| 57 | 2 | 2 | Evita Leter | Suriname | 1:17.97 | |
| 58 | 2 | 1 | Pilar Shimizu | Guam | 1:18.11 | |
| 59 | 2 | 6 | Izzy Joachim | Saint Vincent and the Grenadines | 1:18.28 | |
| 60 | 2 | 9 | Teona Bostashvili | Georgia | 1:19.53 | |
| 61 | 1 | 3 | Claudia Verdino | Monaco | 1:19.85 | |
| 62 | 1 | 2 | Bonita Imsirovic | Botswana | 1:20.81 | |
| 63 | 1 | 5 | Oreoluwa Cherebin | Grenada | 1:21.06 | |
| 64 | 1 | 4 | Rechael Tonjor | Nigeria | 1:21.54 | |
| 65 | 1 | 7 | Darya Semyonova | Turkmenistan | 1:23.19 | |
| 66 | 1 | 6 | Anum Bandey | Pakistan | 1:25.11 | |
| 67 | 1 | 1 | Alphonsine Agahozo | Rwanda | 1:27.80 | |
| 68 | 1 | 0 | Daniah Hagul | Libya | 1:28.59 | |
| 69 | 1 | 8 | Sajina Aishath | Maldives | 1:32.10 | |
| | 1 | 9 | Alia Al-Shamsi | United Arab Emirates | DSQ | |

### Semifinals

The semifinals were held on 3 August at 17:58.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Rūta Meilutytė | Lithuania | 1:05.64 | Q |
| 2 | 4 | Shi Jinglin | China | 1:06.28 | Q |
| 3 | 6 | Jennie Johansson | Sweden | 1:06.76 | Q |
| 4 | 3 | Hrafnhildur Lúthersdóttir | Iceland | 1:07.11 | Q |
| 5 | 1 | Rachel Nicol | Canada | 1:07.24 | |
| 6 | 7 | Lorna Tonks | Australia | 1:07.54 | |
| 7 | 8 | Jenna Laukkanen | Finland | 1:07.60 | |
| 8 | 2 | Jessica Vall | Spain | 1:08.02 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Yuliya Yefimova | Russia | 1:05.60 | Q |
| 2 | 2 | Alia Atkinson | Jamaica | 1:06.21 | Q, NR |
| 3 | 3 | Kanako Watanabe | Japan | 1:06.64 | Q |
| 4 | 8 | Arianna Castiglioni | Italy | 1:06.95 | Q |
| 5 | 6 | Taylor McKeown | Australia | 1:07.19 | |
| 6 | 5 | Jessica Hardy | United States | 1:07.22 | |
| 7 | 1 | Rikke Møller Pedersen | Denmark | 1:07.42 | |
| 8 | 7 | Fanny Lecluyse | Belgium | 1:07.75 | |

### Final

The final was held on 4 August at 19:17.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Yuliya Yefimova | Russia | 1:05.66 |
| | 5 | Rūta Meilutytė | Lithuania | 1:06.36 |
| | 3 | Alia Atkinson | Jamaica | 1:06.42 |
| 4 | 2 | Kanako Watanabe | Japan | 1:06.43 |
| 5 | 6 | Shi Jinglin | China | 1:06.55 |
| 6 | 8 | Hrafnhildur Lúthersdóttir | Iceland | 1:07.10 |
| 7 | 7 | Jennie Johansson | Sweden | 1:07.17 |
| 8 | 1 | Arianna Castiglioni | Italy | 1:07.60 |