# Swimming at the 2015 Pan American Games – Women's 100 metre butterfly

The women's 100 metre butterfly competition of the swimming events at the 2015 Pan American Games took place on July 16 at the CIBC Pan Am/Parapan Am Aquatics Centre and Field House in Toronto, Canada. The defending Pan American Games champion was Claire Donahue of the United States.
This race consisted of two lengths of the pool, all lengths in butterfly. The top eight swimmers from the heats would qualify for the A final (where the medals would be awarded), while the next best eight swimmers would qualify for the B final.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Dana Vollmer (USA) | 55.98 | London, United Kingdom | July 29, 2012 |
| Pan American Games record | Claire Donahue (USA) | 58.59 | Guadalajara, Mexico | October 15, 2011 |
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 16 July | Heat 1 | Kelsi Worrell | United States | 57.24 | GR |

## Qualification

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (1:01.49) in the qualifying period (January 1, 2014 to May 1, 2015). NOCs were also permitted to enter one athlete providing they had met the B standard (1:05.18) in the same qualifying period. All other competing athletes were entered as universality spots.

## Schedule

All times are Eastern Time Zone (UTC-4).
| Date | Time | Round |
| July 16, 2015 | 10:45 | Heats |
| July 16, 2015 | 20:03 | Final B |
| July 16, 2015 | 20:08 | Final A |

## Results

| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on July 16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Kelsi Worrell | United States | 57.24 | QA, GR |
| 2 | 3 | 4 | Katerine Savard | Canada | 58.34 | QA |
| 3 | 2 | 4 | Noemie Thomas | Canada | 58.61 | QA |
| 4 | 3 | 5 | Daynara de Paula | Brazil | 58.70 | QA |
| 5 | 2 | 5 | Daiene Dias | Brazil | 59.16 | QA |
| 6 | 3 | 3 | Arianna Vanderpool-Wallace | Bahamas | 59.33 | QA |
| 7 | 1 | 5 | Gia Dalesandro | United States | 59.83 | QA |
| 8 | 1 | 3 | Jessica Camposano | Colombia | 1:00.85 | QA |
| 9 | 2 | 6 | Marie Meza | Costa Rica | 1:01.01 | QB |
| 10 | 3 | 2 | Ana Sofia Revilak | Mexico | 1:01.25 | QB |
| 11 | 2 | 2 | Isabella Paez | Venezuela | 1:01.27 | QB |
| 12 | 1 | 6 | Belen Diaz | Argentina | 1:01.53 | QB |
| 13 | 1 | 2 | McKenna DeBever | Peru | 1:01.62 | QB |
| 14 | 3 | 6 | Diana Luna | Mexico | 1:01.85 | QB |
| 15 | 2 | 3 | Carolina Colorado | Colombia | 1:02.36 | QB |
| 16 | 2 | 7 | Tereysa Lehnertz | Puerto Rico | 1:02.43 | QB |
| 17 | 3 | 7 | Sharon Bravo | Ecuador | 1:03.67 | |
| 18 | 1 | 7 | Trudian Patrick | Jamaica | 1:04.43 | |
| 19 | 2 | 1 | Dalia Torrez | Nicaragua | 1:04.79 | |
| 20 | 3 | 1 | Estefania Urzua | Chile | 1:05.79 | |
| 21 | 1 | 1 | Oreoluwa Cherebin | Grenada | 1:10.05 | |

### B Final

The B final was also held on July 16.
| Rank | Lane | Name | Nationality | Time |
| 9 | 5 | Isabella Paez | Venezuela | 1:00.79 |
| 10 | 4 | Ana Sofia Revilak | Mexico | 1:01.16 |
| 11 | 2 | Diana Luna | Mexico | 1:01.49 |
| 12 | 3 | Belen Diaz | Argentina | 1:01.50 |
| 13 | 7 | Carolina Colorado | Colombia | 1:01.81 |
| 14 | 1 | Tereysa Lehnertz | Puerto Rico | 1:02.02 |
| 15 | 6 | McKenna DeBever | Peru | 1:02.10 |
| | 8 | Sharon Bravo | Ecuador | DNS |

### A Final

The A final was also held on July 16.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Kelsi Worrell | United States | 57.78 |
| | 3 | Noemie Thomas | Canada | 58.00 |
| | 5 | Katerine Savard | Canada | 58.05 |
| 4 | 6 | Daynara de Paula | Brazil | 58.56 |
| 5 | 2 | Daiene Dias | Brazil | 58.74 |
| 6 | 7 | Gia Dalesandro | United States | 59.24 |
| 7 | 8 | Marie Meza | Costa Rica | 1:00.89 |
| 8 | 1 | Jessica Camposano | Colombia | 1:01.18 |