# 2018 Pan Pacific Swimming Championships – Women's 100 metre freestyle

The women's 100 metre freestyle competition at the 2018 Pan Pacific Swimming Championships took place on August 10 at the Tokyo Tatsumi International Swimming Center. The defending champion was Cate Campbell of Australia.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:
| World record | Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | 23 July 2017 |
| Pan Pacific Championships record | Cate Campbell (AUS) | 52.62 | Gold Coast, Australia | 22 August 2014 |

## Results

All times are in minutes and seconds.
| KEY: | QA | Qualified A Final | QB | Qualified B Final | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on 10 August from 10:00.
Only two swimmers from each country may advance to the A or B final. If a country does not qualify any swimmer to the A final, that same country may qualify up to three swimmers to the B final.
| Rank | Name | Nationality | Time | Notes |
| 1 | Simone Manuel | United States | 53.23 | QA |
| 2 | Cate Campbell | Australia | 53.27 | QA |
| 3 | Mallory Comerford | United States | 53.30 | QA |
| 4 | Taylor Ruck | Canada | 53.34 | QA |
| 5 | Shayna Jack | Australia | 53.61 | QA |
| 6 | Emma McKeon | Australia | 53.97 | QB |
| 7 | Kayla Sanchez | Canada | 54.02 | QA |
| 7 | Margo Geer | United States | 54.02 | QB |
| 9 | Kelsi Dahlia | United States | 54.09 | QB |
| 10 | Kathryn McLaughlin | United States | 54.14 | |
| 10 | Rikako Ikee | Japan | 54.14 | QA |
| 12 | Madeline Groves | Australia | 54.18 | QB, WD |
| 13 | Abbigail Weitzeil | United States | 54.20 | |
| 14 | Allison Schmitt | United States | 54.53 | |
| 15 | Rebecca Smith | Canada | 54.54 | QB |
| 16 | Larissa Oliveira | Brazil | 54.68 | QA |
| 17 | Tomomi Aoki | Japan | 54.84 | QB |
| 18 | Alexia Zevnik | Canada | 54.93 | QB |
| 18 | Brianna Throssell | Australia | 54.93 | QB |
| 20 | Chihiro Igarashi | Japan | 54.96 | QB |
| 21 | Gabrielle DeLoof | United States | 55.22 | |
| 22 | Mayuka Yamamoto | Japan | 55.32 | |
| 23 | Kyla Leibel | Canada | 55.37 | |
| 24 | Rio Shirai | Japan | 55.44 | |
| 25 | Sarah Fournier | Canada | 55.57 | |
| 26 | Yui Yamane | Japan | 55.73 | |
| 27 | Lorrane Ferreira | Brazil | 56.50 | |
| 28 | Ai Soma | Japan | 57.13 | |
| 29 | Nicole Oliva | Philippines | 57.17 | |
| 30 | Miranda Renner | Philippines | 1:00.05 | |
| 31 | Mineri Gomez | Guam | 1:04.40 | |
| 32 | Gianna Garcia | Philippines | 1:04.54 | |
| 33 | Osisang Chilton | Palau | 1:07.30 | |
| – | Ariarne Titmus | Australia | DNS | |
| – | Kanako Watanabe | Japan | DNS | |

### B Final

The B final was held on 10 August from 18:00.
| Rank | Name | Nationality | Time |
| 9 | Emma McKeon | Australia | 53.37 |
| 10 | Kelsi Dahlia | United States | 54.33 |
| 11 | Margo Geer | United States | 54.47 |
| 12 | Brianna Throssell | Australia | 54.50 |
| 13 | Tomomi Aoki | Japan | 54.69 |
| 14 | Rebecca Smith | Canada | 54.72 |
| 15 | Chihiro Igarashi | Japan | 55.05 |
| 16 | Alexia Zevnik | Canada | 55.45 |

### A Final

The A final was held on 10 August from 18:00.
| Rank | Name | Nationality | Time | Notes |
| | Cate Campbell | Australia | 52.03 | CR, OC |
| | Simone Manuel | United States | 52.66 | |
| | Taylor Ruck | Canada | 52.72 | |
| 4 | Mallory Comerford | United States | 52.94 | |
| 5 | Rikako Ikee | Japan | 53.14 | |
| 6 | Kayla Sanchez | Canada | 53.68 | |
| 7 | Shayna Jack | Australia | 53.74 | |
| 8 | Larissa Oliveira | Brazil | 54.78 | |