# 2021 FINA World Swimming Championships (25 m) – Women's 100 metre breaststroke

The Women's 100 metre breaststroke competition of the 2021 FINA World Swimming Championships (25 m) was held on 19 and 20 December 2021.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Rūta Meilutytė (LTU) Alia Atkinson (JAM) Alia Atkinson (JAM) | 1:02.36 | Moscow, RussiaDoha, QatarChartres, France | 12 October 20136 December 201426 August 2016 |
| Competition record | Alia Atkinson (JAM) | 1:02.36 | Doha, Qatar | 6 December 2014 |

## Results
### Heats

The heats were started on 19 December at 10:45.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 6 | Sophie Hansson | Sweden | 1:04.50 | Q |
| 2 | 6 | 3 | Mona McSharry | Ireland | 1:04.59 | Q |
| 3 | 6 | 4 | Alia Atkinson | Jamaica | 1:04.88 | Q |
| 4 | 4 | 8 | Tang Qianting | China | 1:04.94 | Q |
| 5 | 4 | 6 | Molly Renshaw | Great Britain | 1:05.03 | Q |
| 6 | 6 | 2 | Kotryna Teterevkova | Lithuania | 1:05.15 | Q |
| 7 | 4 | 2 | Emelie Fast | Sweden | 1:05.36 | Q |
| 8 | 6 | 7 | Jessica Vall | Spain | 1:05.42 | Q |
| 9 | 4 | 3 | Anastasia Gorbenko | Israel | 1:05.47 | Q |
| 10 | 6 | 5 | Eneli Jefimova | Estonia | 1:05.57 | Q |
| 11 | 4 | 4 | Martina Carraro | Italy | 1:05.61 | Q |
| 12 | 4 | 5 | Emily Escobedo | United States | 1:05.69 | Q |
| 13 | 4 | 7 | Lisa Mamie | Switzerland | 1:05.83 | Q |
| 14 | 5 | 5 | Evgeniia Chikunova | Russian Swimming Federation | 1:05.90 | Q |
| 15 | 5 | 6 | Nika Godun | Russian Swimming Federation | 1:06.08 | Q |
| 16 | 6 | 0 | Lena Kreundl | Austria | 1:06.33 | Q |
| 17 | 5 | 7 | Alina Zmushka | Belarus | 1:06.41 | |
| 18 | 5 | 0 | Niamh Coyne | Ireland | 1:06.44 | |
| 19 | 6 | 1 | Veera Kivirinta | Finland | 1:06.52 | |
| 20 | 4 | 0 | Martina Barbeito | Argentina | 1:06.86 | |
| 21 | 4 | 9 | Eszter Békési | Hungary | 1:07.00 | |
| 22 | 1 | 6 | Pamela Alencar | Brazil | 1:07.46 | |
| 23 | 6 | 8 | Tjaša Vozel | Slovenia | 1:07.52 | |
| 24 | 5 | 9 | Back Su-yeon | South Korea | 1:07.54 | |
| 25 | 5 | 8 | Cornelia Pammer | Austria | 1:07.76 | |
| 26 | 3 | 2 | Lillian Higgs | Bahamas | 1:07.87 | NR |
| 27 | 3 | 4 | Ana Blažević | Croatia | 1:07.89 | |
| 28 | 6 | 9 | Melissa Rodríguez | Mexico | 1:07.98 | NR |
| 29 | 3 | 6 | Anastasia Basisto | Moldova | 1:08.22 | |
| 30 | 3 | 3 | Justine Delmas | France | 1:08.89 | |
| 31 | 3 | 5 | Maria Drasidou | Greece | 1:08.92 | |
| 32 | 3 | 1 | Emily Santos | Panama | 1:10.26 | NR |
| 33 | 2 | 7 | Kamonchanok Kwanmuang | Thailand | 1:10.35 | |
| 34 | 3 | 7 | Nàdia Tudó | Andorra | 1:11.11 | |
| 35 | 3 | 8 | Adelaida Pchelintseva | Kazakhstan | 1:11.31 | |
| 36 | 3 | 9 | Elisa Funes | El Salvador | 1:11.36 | NR |
| 37 | 2 | 4 | Krista Jurado | Guatemala | 1:12.51 | |
| 38 | 3 | 0 | Alicia Kok Shun | Mauritius | 1:13.18 | NR |
| 39 | 2 | 1 | Valentina Aloisio | Bolivia | 1:14.01 | |
| 40 | 2 | 2 | Mariam Mithqal | Jordan | 1:15.09 | NR |
| 41 | 2 | 3 | Emilie Grand'Pierre | Haiti | 1:15.13 | NR |
| 42 | 2 | 8 | Anaika Charles | Grenada | 1:16.24 | |
| 43 | 2 | 6 | Lara Dashti | Kuwait | 1:16.56 | |
| 44 | 2 | 9 | Latroya Pina | Cape Verde | 1:18.73 | |
| 45 | 1 | 7 | Ekaterina Smorkalova | Kyrgyzstan | 1:19.65 | |
| 46 | 1 | 2 | Mei-Li Tan Minnich | Cambodia | 1:19.87 | |
| 47 | 1 | 4 | Taeyanna Adams | Federated States of Micronesia | 1:20.90 | |
| 48 | 2 | 0 | Upaasti Maharjan | Nepal | 1:21.77 | |
| 49 | 1 | 5 | Mariama Touré | Guinea | 1:36.59 | |
| 50 | 1 | 8 | Aichata Konate | Mali | 1:51.78 | |
| | 1 | 1 | Unilez Takyi | Ghana | DSQ | |
| | 2 | 5 | Claudia Verdino | Monaco | DSQ | |
| | 5 | 3 | Ida Hulkko | Finland | DSQ | |
| | 5 | 4 | Arianna Castiglioni | Italy | DSQ | |
| | 1 | 3 | Lucie Kouadio-Patinier | Ivory Coast | DNS | |
| | 4 | 1 | Andrea Podmaníková | Slovakia | DNS | |
| | 5 | 1 | Florine Gaspard | Belgium | DNS | |
| | 5 | 2 | Lydia Jacoby | United States | DNS | |

### Semifinals

The semifinals were started on 19 December at 19:48.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 5 | Tang Qianting | China | 1:03.99 | Q, AS |
| 2 | 2 | 4 | Sophie Hansson | Sweden | 1:04.17 | Q, NR |
| 3 | 1 | 4 | Mona McSharry | Ireland | 1:04.22 | Q, NR |
| 4 | 2 | 5 | Alia Atkinson | Jamaica | 1:04.26 | Q |
| 5 | 2 | 8 | Nika Godun | Russian Swimming Federation | 1:04.34 | Q |
| 6 | 2 | 3 | Molly Renshaw | Great Britain | 1:04.43 | Q, NR |
| 7 | 1 | 3 | Kotryna Teterevkova | Lithuania | 1:04.54 | Q |
| 8 | 1 | 7 | Emily Escobedo | United States | 1:04.81 | Q |
| 9 | 1 | 1 | Evgeniia Chikunova | Russian Swimming Federation | 1:04.85 | |
| 10 | 2 | 7 | Martina Carraro | Italy | 1:04.89 | |
| 11 | 2 | 2 | Anastasia Gorbenko | Israel | 1:04.95 | |
| 12 | 2 | 6 | Emelie Fast | Sweden | 1:05.28 | |
| 13 | 1 | 2 | Eneli Jefimova | Estonia | 1:05.44 | |
| 14 | 2 | 1 | Lisa Mamie | Switzerland | 1:05.54 | |
| 15 | 1 | 6 | Jessica Vall | Spain | 1:05.80 | |
| 16 | 1 | 8 | Lena Kreundl | Austria | 1:05.83 | |

### Final

The final was held on 20 December at 19:42.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Tang Qianting | China | 1:03.47 | AS |
| | 5 | Sophie Hansson | Sweden | 1:03.50 | NR |
| | 3 | Mona McSharry | Ireland | 1:03.92 | NR |
| 4 | 6 | Alia Atkinson | Jamaica | 1:04.03 | |
| 5 | 7 | Molly Renshaw | Great Britain | 1:04.37 | NR |
| 6 | 2 | Nika Godun | Russian Swimming Federation | 1:04.43 | |
| 7 | 1 | Kotryna Teterevkova | Lithuania | 1:04.64 | |
| 8 | 8 | Emily Escobedo | United States | 1:05.14 | |