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

The women's 100 metre backstroke 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 Championship record | Katinka Hosszú | Hungary | 55.03 | Doha | 4 December 2014 |

## Results
### Heats

The heats were started on 11 December at 11:49.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 5 | Olivia Smoliga | United States | 55.47 | Q, AM |
| 2 | 6 | 4 | Emily Seebohm | Australia | 57.08 | Q |
| 3 | 4 | 4 | Katinka Hosszú | Hungary | 57.09 | Q |
| 4 | 4 | 3 | Simona Kubová | Czech Republic | 57.13 | Q |
| 5 | 5 | 4 | Kathleen Baker | United States | 57.16 | Q |
| 6 | 6 | 5 | Minna Atherton | Australia | 57.17 | Q |
| 7 | 5 | 5 | Michelle Coleman | Sweden | 57.21 | Q |
| 8 | 6 | 3 | Georgia Davies | Great Britain | 57.24 | Q |
| 9 | 5 | 6 | Sayaka Akase | Japan | 57.36 | Q |
| 10 | 5 | 3 | Emi Moronuki | Japan | 57.42 | Q |
| 11 | 6 | 6 | Fu Yuanhui | China | 57.66 | Q |
| 12 | 4 | 2 | Alicja Tchórz | Poland | 57.78 | Q |
| 13 | 4 | 6 | Anastasia Fesikova | Russia | 57.85 | Q |
| 14 | 5 | 2 | Mimosa Jallow | Finland | 57.93 | Q |
| 15 | 4 | 0 | Margherita Panziera | Italy | 58.14 | Q |
| 16 | 4 | 7 | Mathilde Cini | France | 58.16 | Q |
| 17 | 6 | 2 | Daria Ustinova | Russia | 58.21 | |
| 18 | 5 | 9 | Laura Riedemann | Germany | 58.27 | |
| 19 | 5 | 1 | Anastasiya Shkurdai | Belarus | 58.44 | |
| 20 | 4 | 8 | Andrea Berrino | Argentina | 58.58 | |
| 21 | 6 | 7 | Etiene Medeiros | Brazil | 58.62 | |
| 22 | 5 | 7 | Hanna Rosvall | Sweden | 58.80 | |
| 23 | 3 | 5 | Isabella Arcila | Colombia | 58.83 | |
| 24 | 4 | 1 | Caroline Pilhatsch | Austria | 58.91 | |
| 25 | 6 | 9 | Jenny Mensing | Germany | 59.08 | |
| 26 | 3 | 1 | Karolína Hájková | Slovakia | 59.25 | |
| 27 | 6 | 0 | Ekaterina Avramova | Turkey | 59.26 | |
| 28 | 3 | 6 | Ingrid Wilm | Canada | 59.31 | |
| 29 | 6 | 1 | Chen Jie | China | 59.36 | |
| 30 | 5 | 8 | Stephanie Au | Hong Kong | 59.38 | |
| 31 | 5 | 0 | Carlotta Zofkova | Italy | 59.57 | |
| 32 | 3 | 3 | Krystal Lara | Dominican Republic | 1:00.28 | NR |
| 33 | 3 | 4 | Gabriela Georgieva | Bulgaria | 1:00.58 | |
| 34 | 3 | 2 | África Zamorano | Spain | 1:00.74 | |
| 35 | 3 | 8 | Lushavel Stickland | Samoa | 1:00.75 | NR |
| 36 | 1 | 5 | Felicity Passon | Seychelles | 1:00.81 | NR |
| 37 | 6 | 8 | Paige Flynn | New Zealand | 1:00.89 | |
| 38 | 4 | 9 | Signhild Joensen | Faroe Islands | 1:00.98 | |
| 39 | 2 | 4 | Celina Márquez | El Salvador | 1:01.27 | NR |
| 40 | 3 | 7 | Tatiana Salcuțan | Moldova | 1:02.96 | |
| 41 | 2 | 3 | Andrea Becali | Cuba | 1:03.96 | |
| 42 | 3 | 9 | Mónica Ramírez | Andorra | 1:04.06 | |
| 43 | 3 | 0 | Trinidad Ardiles | Chile | 1:04.23 | NR |
| 44 | 1 | 6 | Camille Koenig | Mauritius | 1:04.47 | |
| 45 | 2 | 6 | Nimia Murua | Panama | 1:05.09 | |
| 46 | 1 | 3 | Ri Hye-gyong | North Korea | 1:05.53 | |
| 47 | 2 | 2 | Danielle Treasure | Barbados | 1:06.74 | |
| 48 | 2 | 8 | Colleen Furgeson | Marshall Islands | 1:07.44 | |
| 49 | 2 | 1 | Kimberly Ince | Grenada | 1:07.68 | |
| 50 | 2 | 5 | Yolani Blake | Fiji | 1:07.87 | |
| 51 | 2 | 7 | Eda Zeqiri | Kosovo | 1:08.69 | |
| 52 | 1 | 4 | Britheny Joassaint | Haiti | 1:09.58 | |
| 53 | 2 | 0 | Osisang Chilton | Palau | 1:12.10 | |
| 54 | 2 | 9 | Ada Thioune | Senegal | 1:16.82 | |
| 55 | 1 | 7 | Amanda Poppe | Guam | 1:21.44 | |
| | 1 | 1 | Hamna Ahmed | Maldives | | DNS |
| | 1 | 2 | Naima Akter | Bangladesh | | DNS |

### Semifinals

The semifinals were started on 11 December at 20:14.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | Georgia Davies | Great Britain | 56.49 | Q |
| 2 | 4 | Emily Seebohm | Australia | 56.84 | Q |
| 3 | 3 | Minna Atherton | Australia | 57.05 | Q |
| 4 | 5 | Simona Kubová | Czech Republic | 57.18 | Q |
| 5 | 2 | Emi Moronuki | Japan | 57.32 | Q |
| 6 | 8 | Mathilde Cini | France | 57.70 | |
| 7 | 1 | Mimosa Jallow | Finland | 57.86 | |
| 8 | 7 | Alicja Tchórz | Poland | 58.40 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Olivia Smoliga | United States | 56.13 | Q |
| 2 | 3 | Kathleen Baker | United States | 56.27 | Q |
| 3 | 5 | Katinka Hosszú | Hungary | 56.46 | Q |
| 4 | 2 | Sayaka Akase | Japan | 57.48 | |
| 5 | 6 | Michelle Coleman | Sweden | 57.57 | |
| 6 | 7 | Fu Yuanhui | China | 57.83 | |
| 7 | 1 | Anastasia Fesikova | Russia | 57.88 | |
| 8 | 8 | Margherita Panziera | Italy | 58.31 | |

### Final

The final was held on 12 December at 20:31.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Olivia Smoliga | United States | 56.19 |
| | 3 | Katinka Hosszú | Hungary | 56.26 |
| | 6 | Georgia Davies | Great Britain | 56.74 |
| | 7 | Minna Atherton | Australia | 56.74 |
| 5 | 5 | Kathleen Baker | United States | 56.89 |
| 6 | 2 | Emily Seebohm | Australia | 56.98 |
| 7 | 1 | Simona Kubová | Czech Republic | 57.03 |
| 8 | 8 | Emi Moronuki | Japan | 57.18 |