# Swimming at the 2018 Commonwealth Games – Women's 100 metre butterfly

The women's 100 metre butterfly event at the 2018 Commonwealth Games was held on 5 and 6 April at the Gold Coast Aquatic Centre.

## Records

Prior to this competition, the existing world, Commonwealth and Games records were as follows:
| World record | Sarah Sjöström (SWE) | 55.48 | Rio de Janeiro, Brazil | 7 August 2016 |
| Commonwealth record | Emma McKeon (AUS) | 56.18 | Budapest, Hungary | 24 July 2017 |
| Games record | Katerine Savard (CAN) | 57.40 | Glasgow, United Kingdom | 25 July 2014 |
The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
| 5 April | Semifinal | Madeline Groves | Australia | 57.22 | GR |
| 6 April | Final | Emma McKeon | Australia | 56.78 | GR |

## Schedule

The schedule is as follows:
All times are Australian Eastern Standard Time (UTC+10)
| Date | Time | Round |
| Thursday 5 April 2018 | 11:58 | Qualifying |
| Thursday 5 April 2018 | 21:33 | Semifinals |
| Friday 6 April 2018 | 21:51 | Final |

## Results
### Heats

| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 3 | Madeline Groves | Australia | 57.77 | Q |
| 2 | 3 | 4 | Emma McKeon | Australia | 58.04 | Q |
| 3 | 3 | 5 | Alys Thomas | Wales | 58.48 | Q |
| 4 | 2 | 4 | Penny Oleksiak | Canada | 58.50 | Q |
| 5 | 2 | 5 | Rebecca Smith | Canada | 58.51 | Q |
| 6 | 1 | 4 | Brianna Throssell | Australia | 58.96 | Q |
| 7 | 1 | 5 | Charlotte Atkinson | Isle of Man | 58.97 | Q |
| 8 | 2 | 6 | Erin Gallagher | South Africa | 59.25 | Q |
| 9 | 3 | 2 | Mabel Zavaros | Canada | 59.44 | Q |
| 10 | 1 | 6 | Harriet Jones | Wales | 59.56 | Q |
| 11 | 1 | 2 | Keanna MacInnes | Scotland | 59.63 | Q |
| 12 | 1 | 3 | Laura Stephens | England | 59.68 | Q |
| 13 | 3 | 6 | Harriet West | Wales | 59.77 | Q |
| 14 | 2 | 2 | Helena Gasson | New Zealand | 1:00.00 | Q |
| 15 | 3 | 7 | Georgia Marris | New Zealand | 1:00.43 | Q |
| 16 | 2 | 3 | Emily Large | England | 1:00.46 | Q |
| 17 | 2 | 7 | Dune Coetzee | South Africa | 1:02.03 | |
| 18 | 1 | 7 | Elodie Poo-cheong | Mauritius | 1:04.39 | |
| 19 | 3 | 1 | Matelita Buadromo | Fiji | 1:04.43 | |
| 20 | 2 | 1 | Katie Kyle | Saint Lucia | 1:05.74 | |
| 21 | 1 | 1 | Aaliyah Palestrini | Seychelles | 1:08.64 | |

### Semifinals

| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Madeline Groves | Australia | 57.22 | Q, GR |
| 2 | 2 | 2 | Rebecca Smith | Canada | 57.77 | Q |
| 3 | 1 | 4 | Emma McKeon | Australia | 57.94 | Q |
| 4 | 2 | 6 | Charlotte Atkinson | Isle of Man | 58.04 | Q |
| 5 | 2 | 5 | Alys Thomas | Wales | 58.17 | Q |
| 6 | 1 | 5 | Penny Oleksiak | Canada | 58.29 | Q |
| 7 | 1 | 3 | Brianna Throssell | Australia | 58.38 | Q |
| 8 | 2 | 3 | Mabel Zavaros | Canada | 58.62 | Q |
| 9 | 1 | 6 | Erin Gallagher | South Africa | 59.04 | |
| 10 | 1 | 2 | Harriet Jones | Wales | 59.49 | |
| 11 | 2 | 7 | Keanna MacInnes | Scotland | 59.55 | |
| 12 | 1 | 1 | Helena Gasson | New Zealand | 59.70 | |
| 13 | 2 | 1 | Harriet West | Wales | 59.93 | |
| 14 | 1 | 8 | Emily Large | England | 59.96 | |
| 15 | 1 | 7 | Laura Stephens | England | 1:00.18 | |
| 16 | 2 | 8 | Georgia Marris | New Zealand | 1:00.58 | |

### Final

| Rank | Lane | Name | Nationality | Time | Notes |
| | 3 | Emma McKeon | Australia | 56.78 | GR |
| | 4 | Madeline Groves | Australia | 57.19 | |
| | 1 | Brianna Throssell | Australia | 57.30 | |
| 4 | 7 | Penny Oleksiak | Canada | 57.50 | |
| 5 | 6 | Charlotte Atkinson | Isle of Man | 57.88 | |
| 6 | 5 | Rebecca Smith | Canada | 57.91 | |
| 7 | 2 | Alys Thomas | Wales | 58.06 | |
| 8 | 8 | Mabel Zavaros | Canada | 58.98 | |