# 2010 Pan Pacific Swimming Championships – Women's 100 metre freestyle

The women's 100 metre freestyle competition at the 2010 Pan Pacific Swimming Championships took place on August 19 at the William Woollett Jr. Aquatics Center. The last champion was Natalie Coughlin of US.
This race consisted of two lengths of the pool, both lengths being in freestyle.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:
| World record | Britta Steffen (GER) | 52.07 | Rome, Italy | July 31, 2009 |
| Pan Pacific Championships record | Amanda Weir (USA) | 53.76 | Victoria, Canada | August 19, 2006 |

## Results

All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on August 19, at 10:00.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Dana Vollmer | United States | 54.01 | QA |
| 2 | 7 | 5 | Natalie Coughlin | United States | 54.09 | QA |
| 3 | 5 | 2 | Yolane Kukla | Australia | 54.17 | QA |
| 4 | 6 | 4 | Jessica Hardy | United States | 54.35 | QA |
| 5 | 6 | 1 | Victoria Poon | Canada | 54.44 | QA |
| 6 | 6 | 3 | Amanda Weir | United States | 54.50 | QA |
| 7 | 7 | 3 | Kara Lynn Joyce | United States | 54.59 | QA |
| 8 | 5 | 5 | Emily Seebohm | Australia | 54.65 | QA |
| 9 | 5 | 3 | Alicia Coutts | Australia | 54.79 | QB |
| 10 | 7 | 6 | Haruka Ueda | Japan | 54.93 | QB |
| 11 | 5 | 1 | Felicity Galvez | Australia | 55.02 | QB |
| 12 | 4 | 4 | Kelly Stubbins | Australia | 55.06 | QB |
| 13 | 5 | 4 | Marieke Guehrer | Australia | 55.17 | QB |
| 13 | 7 | 7 | Missy Franklin | United States | 55.17 | QB |
| 15 | 1 | 5 | Allison Schmitt | United States | 55.19 | QB |
| 16 | 6 | 5 | Hannah Wilson | Hong Kong | 55.24 | QB |
| 17 | 6 | 2 | Alice Mills | Australia | 55.33 | |
| 18 | 6 | 6 | Hayley Palmer | New Zealand | 55.42 | |
| 19 | 4 | 8 | Meagen Nay | Australia | 55.43 | |
| 20 | 7 | 2 | Morgan Scroggy | United States | 55.46 | |
| 21 | 5 | 6 | Tatiana Lemos | Brazil | 55.52 | |
| 22 | 6 | 8 | Yayoi Matsumoto | Japan | 55.54 | |
| 23 | 3 | 4 | Erica Morningstar | Canada | 55.64 | |
| 24 | 3 | 5 | Madison Kennedy | United States | 55.67 | |
| 25 | 5 | 8 | Angie Bainbridge | Australia | 55.70 | |
| 26 | 3 | 5 | Tomoko Hagiwara | Japan | 55.73 | |
| 27 | 4 | 6 | Hanae Ito | Japan | 55.83 | |
| 28 | 3 | 2 | Genevieve Saumur | Canada | 55.89 | |
| 29 | 4 | 3 | Tash Hind | New Zealand | 55.90 | |
| 30 | 4 | 2 | Christine Magnuson | United States | 55.94 | |
| 31 | 3 | 8 | Elizabeth Pelton | United States | 55.96 | |
| 32 | 7 | 1 | Bronte Barratt | Australia | 56.01 | |
| 33 | 3 | 4 | Sinead Russell | Canada | 56.02 | |
| 34 | 2 | 1 | Samantha Cheverton | Canada | 56.40 | |
| 34 | 7 | 8 | Flávia Delaroli | Brazil | 56.40 | |
| 36 | 2 | 4 | Alexandra Gabor | Canada | 56.41 | |
| 37 | 3 | 6 | Amaka Gessler | New Zealand | 56.48 | |
| 37 | 6 | 7 | Katie Hoff | United States | 56.48 | |
| 39 | 4 | 1 | Hannah Riordan | Canada | 56.53 | |
| 40 | 3 | 7 | Penny Marshall | New Zealand | 56.55 | |
| 41 | 3 | 1 | Julyana Kury | Brazil | 56.61 | |
| 42 | 4 | 1 | Audrey Lacroix | Canada | 56.67 | |
| 42 | 4 | 1 | Barbara Jardin | Canada | 56.67 | |
| 44 | 4 | 1 | Kathleen Hersey | United States | 56.78 | |
| 45 | 1 | 4 | MacKenzie Downing | Canada | 56.84 | |
| 46 | 2 | 6 | Lauren Boyle | New Zealand | 56.96 | |
| 47 | 2 | 2 | Risa Sekine | Japan | 57.01 | |
| 48 | 2 | 8 | Akane Hoshi | Japan | 58.12 | |
| 49 | 1 | 3 | Manuella Lyrio | Brazil | 58.26 | |
| - | 4 | 7 | Stephanie Rice | Australia | DNS | |
| - | 5 | 7 | Sally Foster | Australia | DNS | |

### B Final

The B final was held on August 19, at 18:05.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Jessica Hardy | United States | 54.16 |
| 10 | 5 | Alicia Coutts | Australia | 54.77 |
| 11 | 6 | Yayoi Matsumoto | Japan | 55.22 |
| 12 | 3 | Tatiana Lemos | Brazil | 55.28 |
| 13 | 2 | Erica Morningstar | Canada | 55.61 |
| 14 | 7 | Tomoko Hagiwara | Japan | 55.95 |
| 15 | 1 | Flávia Delaroli | Brazil | 56.21 |
| 16 | 8 | Sinead Russell | Canada | 56.23 |

### A Final

The A final was held on August 19, at 18:05.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Natalie Coughlin | United States | 53.67 | CR |
| | 2 | Emily Seebohm | Australia | 53.96 | |
| | 4 | Dana Vollmer | United States | 53.96 | |
| 4 | 3 | Yolane Kukla | Australia | 54.02 | |
| 5 | 6 | Victoria Poon | Canada | 54.45 | |
| 6 | 7 | Haruka Ueda | Japan | 54.93 | |
| 7 | 1 | Hannah Wilson | Hong Kong | 55.32 | |
| 8 | 8 | Hayley Palmer | New Zealand | 56.04 | |