2010 Pan Pacific Swimming Championships – Women's 4 × 100 metre freestyle relay
The women's 4 × 100 metre freestyle relay competition at the 2010 Pan Pacific Swimming Championships took place on August 20 at the William Woollett Jr. Aquatics Center. The last champion was the United States.
This race consisted of eight lengths of the pool. Each of the four swimmers completed two lengths of the pool. The first swimmer had to touch the wall before the second could leave the starting block.
Records
Prior to this competition, the existing world and Pan Pacific records were as follows:| World record | Inge Dekker Ranomi Kromowidjojo Femke Heemskerk Marleen Veldhuis | 3:31.72 | Rome, Italy | July 26, 2009 |
| Pan Pacific Championships record | Amanda Weir Natalie Coughlin Kara Lynn Joyce Lacey Nymeyer | 3:35.80 | 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
Heats weren't performed, as only five teams had entered.Final
The final was held on August 20, at 20:06.| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Natalie Coughlin Jessica Hardy Amanda Weir Dana Vollmer | 3:35.11 | CR | ||
| 4 | Yolane Kukla Emily Seebohm Alicia Coutts Felicity Galvez | 3:38.06 | |||
| 2 | Victoria Poon Julia Wilkinson Erica Morningstar Genevieve Saumur | 3:38.14 | |||
| 4 | 3 | Haruka Ueda Yayoi Matsumoto Tomoko Hagiwara Hanae Ito | 3:38.86 | ||
| 5 | 6 | Hayley Palmer Tash Hind Amaka Gessler Penny Marshall | 3:42.15 |