1999 Pan Pacific Swimming Championships – Women's 4 × 100 metre medley relay
The women's 4 × 100 metre medley relay competition at the 1999 Pan Pacific Swimming Championships took place on August 29 at the Sydney International Aquatic Centre. The last champion was the United States.
Records
Prior to this competition, the existing world and Pan Pacific records were as follows:| World record | He Cihong Dai Guohong Liu Limin Le Jingyi | 4:01.67 | Rome, Italy | September 10, 1994 |
| Pan Pacific Championships record | Nicole Livingstone Samantha Riley Susie O'Neill Sarah Ryan | 4:02.93 | Atlanta, United States | August 13, 1995 |
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 seven teams had entered.Final
The final was held on August 29.| Rank | Name | Nationality | Time | Notes |
| Barbara Bedford Megan Quann Jenny Thompson Liesl Kolbisen | 4:03.09 | |||
| Dyana Calub Samantha Riley Susie O'Neill Sarah Ryan | 4:05.74 | |||
| Mai Nakamura Masami Tanaka Ayari Aoyama Suzu Chiba | 4:07.14 | |||
| 4 | Charlene Wittstock Penelope Heyns Amanda Loots Stacey Bowley | 4:07.74 | ||
| 5 | Erin Gammel Lauren van Oosten Jessica Deglau Laura Nicholls | 4:09.51 | ||
| 6 | Choi Soo-min Kye Yoon-hee Cho Hee-yeon Roh Joo-hee | 4:18.17 | ||
| 7 | Nikki Tanner Jolie Workman Elizabeth Van Welie Monique Robbins | 4:19.65 |