1999 Pan Pacific Swimming Championships – Women's 4 × 100 metre medley relay
# 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 | China (CHN) He Cihong (1:00.16) Dai Guohong (1:09.04) Liu Limin (58.66) Le Jingyi (53.81) | 4:01.67 | Rome, Italy | September 10, 1994 |
| - | - | - | - | - |
| Pan Pacific Championships record | Australia (AUS) Nicole Livingstone (1:01.95) Samantha Riley (1:07.19) Susie O'Neill (58.82) Sarah Ryan (54.97) | 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 |
| - | - | - | - |
| | Barbara Bedford (1:01.53) Megan Quann (1:07.55) Jenny Thompson (58.00) Liesl Kolbisen (56.01) | United States | 4:03.09 |
| | Dyana Calub (1:02.24) Samantha Riley (1:09.35) Susie O'Neill (58.87) Sarah Ryan (55.28) | Australia | 4:05.74 |
| | Mai Nakamura (1:01.68) Masami Tanaka (1:09.57) Ayari Aoyama (1:00.26) Suzu Chiba (55.63) | Japan | 4:07.14 |
| 4 | Charlene Wittstock (1:03.81) Penelope Heyns (1:06.69) Amanda Loots (1:00.62) Stacey Bowley (56.62) | South Africa | 4:07.74 |
| 5 | Erin Gammel (1:02.83) Lauren van Oosten (1:10.77) Jessica Deglau (1:00.42) Laura Nicholls (55.49) | Canada | 4:09.51 |
| 6 | Choi Soo-min (1:04.22) Kye Yoon-hee (1:14.08) Cho Hee-yeon (1:01.26) Roh Joo-hee (58.61) | South Korea | 4:18.17 |
| 7 | Nikki Tanner (1:04.44) Jolie Workman (1:13.51) Elizabeth Van Welie (1:04.05) Monique Robbins (57.65) | New Zealand | 4:19.65 |
