# Swimming at the 2019 Pan American Games – Women's 100 metre freestyle

The women's 100 metre freestyle competition of the swimming events at the 2019 Pan American Games was held on 8 August 2019 at the Villa Deportiva Nacional Videna cluster.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World Record | Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | July 23, 2017 |
| Pan American Games record | Chantal van Landeghem (CAN) | 53.83 | Toronto, Canada | July 14, 2015 |

## 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 August 8.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Margo Geer | United States | 54.65 | QA |
| 2 | 4 | 5 | Alexia Zevnik | Canada | 55.36 | QA |
| 3 | 2 | 5 | Alyson Ackman | Canada | 55.78 | QA |
| 4 | 2 | 4 | Larissa Oliveira | Brazil | 56.02 | QA |
| 5 | 3 | 4 | Lia Neal | United States | 56.49 | QA |
| 6 | 3 | 5 | Daynara de Paula | Brazil | 56.65 | QA |
| 7 | 4 | 3 | Elisbet Gámez Matos | Cuba | 57.03 | QA |
| 8 | 2 | 3 | Karen Torrez | Bolivia | 57.19 | QA |
| 9 | 3 | 6 | Allyson Ponson | Aruba | 57.28 | QB |
| 10 | 1 | 5 | Sirena Rowe | Colombia | 57.48 | QB |
| 11 | 4 | 6 | Anicka Delgado | Ecuador | 57.51 | QB |
| 12 | 3 | 3 | Jeserik Pinto | Venezuela | 57.57 | WD |
| 13 | 4 | 8 | Inés Marín | Chile | 58.08 | QB |
| 14 | 4 | 2 | Julimar Avila | Honduras | 58.15 | QB |
| 15 | 3 | 2 | Emily MacDonald | Jamaica | 58.19 | QB |
| 16 | 2 | 6 | María Mejia | Guatemala | 58.57 | QB |
| 17 | 2 | 2 | Madelyn Moore | Bermuda | 59.02 | QB |
| 18 | 3 | 8 | Jessica Cattaneo | Peru | 59.05 | |
| 19 | 2 | 1 | Rafaela Fernandini | Peru | 59.31 | |
| 20 | 2 | 8 | Lillian Higgs | Bahamas | 59.32 | |
| 20 | 3 | 7 | Maria Schutzmeier | Nicaragua | 59.32 | |
| 22 | 4 | 7 | Giselle Gursoy | Trinidad and Tobago | 59.34 | |
| 23 | 3 | 1 | Catharine Cooper | Panama | 59.66 | |
| 24 | 2 | 7 | Inés Remersaro | Uruguay | 59.69 | |
| 25 | 4 | 1 | Lauren Hew | Cayman Islands | 1:01.38 | |
| 26 | 1 | 5 | Mya de Freitas | Saint Vincent and the Grenadines | 1:03.49 | |
| 27 | 1 | 4 | Bianca Mitchell | Antigua and Barbuda | 1:04.21 | |
| 28 | 1 | 3 | Nikita Fiedtkou | Guyana | 1:06.07 | |

### Final B

The b final was also held on August 8.
| Rank | Lane | Name | Nationality | Time | Notes |
| 9 | 4 | Allyson Ponson | Aruba | 57.06 | |
| 10 | 3 | Anicka Delgado | Ecuador | 57.13 | |
| 11 | 5 | Sirena Rowe | Colombia | 57.64 | |
| 12 | 2 | Julimar Avila | Honduras | 57.74 | NR |
| 13 | 6 | Inés Marín | Chile | 57.89 | |
| 14 | 1 | María Mejia | Guatemala | 57.94 | |
| 15 | 7 | Emily MacDonald | Jamaica | 58.07 | |
| 16 | 8 | Madelyn Moore | Bermuda | 58.68 | |

### Final A

The A final was also held on August 8.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Margo Geer | United States | 54.17 |
| | 5 | Alexia Zevnik | Canada | 55.04 |
| | 6 | Larissa Oliveira | Brazil | 55.25 |
| 4 | 2 | Lia Neal | United States | 55.62 |
| 5 | 3 | Alyson Ackman | Canada | 55.81 |
| 6 | 8 | Karen Torrez | Bolivia | 56.59 |
| 7 | 7 | Daynara de Paula | Brazil | 56.88 |
| 8 | 1 | Elisbet Gámez Matos | Cuba | 57.05 |