2018 Pan Pacific Swimming Championships – Women's 100 metre freestyle

Prior to this competition, the existing world and Pan Pacific records were as follows:

World record	Sarah Sjöström (SWE)	51.71	Budapest, Hungary	23 July 2017
Pan Pacific Championships record	Cate Campbell (AUS)	52.62	Gold Coast, Australia	22 August 2014

All times are in minutes and seconds.

Heats

The first round was held on 10 August from 10:00.^[3]

Only two swimmers from each country may advance to the A or B final. If a country does not qualify any swimmer to the A final, that same country may qualify up to three swimmers to the B final.^[4]

Rank	Name	Nationality	Time	Notes
1	Simone Manuel	United States	53.23	QA
2	Cate Campbell	Australia	53.27	QA
3	Mallory Comerford	United States	53.30	QA
4	Taylor Ruck	Canada	53.34	QA
5	Shayna Jack	Australia	53.61	QA
6	Emma McKeon	Australia	53.97	QB
7	Kayla Sanchez	Canada	54.02	QA
7	Margo Geer	United States	54.02	QB
9	Kelsi Dahlia	United States	54.09	QB
10	Kathryn McLaughlin	United States	54.14
10	Rikako Ikee	Japan	54.14	QA
12	Madeline Groves	Australia	54.18	QB, WD
13	Abbigail Weitzeil	United States	54.20
14	Allison Schmitt	United States	54.53
15	Rebecca Smith	Canada	54.54	QB
16	Larissa Oliveira	Brazil	54.68	QA
17	Tomomi Aoki	Japan	54.84	QB
18	Alexia Zevnik	Canada	54.93	QB
18	Brianna Throssell	Australia	54.93	QB
20	Chihiro Igarashi	Japan	54.96	QB
21	Gabrielle DeLoof	United States	55.22
22	Mayuka Yamamoto	Japan	55.32
23	Kyla Leibel	Canada	55.37
24	Rio Shirai	Japan	55.44
25	Sarah Fournier	Canada	55.57
26	Yui Yamane	Japan	55.73
27	Lorrane Ferreira	Brazil	56.50
28	Ai Soma	Japan	57.13
29	Nicole Oliva	Philippines	57.17
30	Miranda Renner	Philippines	1:00.05
31	Mineri Gomez	Guam	1:04.40
32	Gianna Garcia	Philippines	1:04.54
33	Osisang Chilton	Palau	1:07.30
–	Ariarne Titmus	Australia	DNS
–	Kanako Watanabe	Japan	DNS

B Final

The B final was held on 10 August from 18:00.^[5]

Rank	Name	Nationality	Time	Notes
9	Emma McKeon	Australia	53.37
10	Kelsi Dahlia	United States	54.33
11	Margo Geer	United States	54.47
12	Brianna Throssell	Australia	54.50
13	Tomomi Aoki	Japan	54.69
14	Rebecca Smith	Canada	54.72
15	Chihiro Igarashi	Japan	55.05
16	Alexia Zevnik	Canada	55.45

A Final

The A final was held on 10 August from 18:00.^[6]

Rank	Name	Nationality	Time	Notes
	Cate Campbell	Australia	52.03	CR, OC
	Simone Manuel	United States	52.66
	Taylor Ruck	Canada	52.72
4	Mallory Comerford	United States	52.94
5	Rikako Ikee	Japan	53.14
6	Kayla Sanchez	Canada	53.68
7	Shayna Jack	Australia	53.74
8	Larissa Oliveira	Brazil	54.78