2010 Pan Pacific Swimming Championships – Women's 4 × 100 metre medley relay
The women's 4 × 100 metre medley relay competition at the 2010 Pan Pacific Swimming Championships took place on August 21 at the William Woollett Jr. Aquatics Center. The last champion was the United States.
Records
Prior to this competition, the existing world and Pan Pacific records were as follows:| World record | Zhao Jing Chen Huijia Jiao Liuyang Li Zhesi | 3:52.19 | Rome, Italy | August 1, 2009 |
| Pan Pacific Championships record | Natalie Coughlin Jessica Hardy Rachel Komisarz Amanda Weir | 3:58.38 | Victoria, Canada | August 20, 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
Heats weren't performed, as only four teams had entered.Final
The final was held on August 21, at 20:15.| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Natalie Coughlin Rebecca Soni Dana Vollmer Jessica Hardy | 3:55.23 | CR | ||
| 4 | Emily Seebohm Leisel Jones Alicia Coutts Yolane Kukla | 3:56.96 | |||
| 3 | Aya Terakawa Satomi Suzuki Yuka Kato Haruka Ueda | 3:57.75 | |||
| 4 | 2 | Julia Wilkinson Annamay Pierse Katerine Savard Victoria Poon | 4:03.08 | ||
| - | 6 | - - - - | DNS |