2018 FINA World Swimming Championships (25 m) – Women's 100 metre breaststroke

The heats were started on 14 December at 10:49.[2]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	6	1	Katie Meili	United States	1:03.76	Q
2	6	4	Alia Atkinson	Jamaica	1:04.34	Q
3	6	2	Martina Carraro	Italy	1:05.06	Q
3	6	6	Fanny Lecluyse	Belgium	1:05.06	Q
5	4	2	Shi Jinglin	China	1:05.24	Q
5	6	3	Arianna Castiglioni	Italy	1:05.24	Q
7	4	3	Jessica Hansen	Australia	1:05.33	Q
8	4	4	Jenna Laukkanen	Finland	1:05.38	Q
9	5	7	Yu Jingyao	China	1:05.55	Q
10	5	6	Kanako Watanabe	Japan	1:05.62	Q
11	5	5	Jessica Vall	Spain	1:05.70	Q
12	5	3	Maria Temnikova	Russia	1:05.82	Q
13	6	5	Vitalina Simonova	Russia	1:05.85	Q
14	4	0	Lisa Mamie	Switzerland	1:05.87	Q
15	5	4	Rūta Meilutytė	Lithuania	1:06.29	Q
16	5	2	Runa Imai	Japan	1:06.35	Q
17	4	9	Anna Sztankovics	Hungary	1:06.42
18	6	7	Jessica Steiger	Germany	1:06.47
19	4	6	Ida Hulkko	Finland	1:06.55
20	5	1	Julia Sebastián	Argentina	1:06.83
21	4	8	Maria Romanjuk	Estonia	1:06.90
22	4	7	Jenna Strauch	Australia	1:07.16
23	5	0	Niamh Coyne	Ireland	1:07.19
24	5	8	Cornelia Pammer	Austria	1:07.24
25	3	4	Viktoriya Zeynep Güneş	Turkey	1:07.39
26	3	2	Sophie Angus	Canada	1:07.53
27	6	0	Andrea Podmaníková	Slovakia	1:07.55
28	3	6	Tatiana Chișca	Moldova	1:08.21
29	6	9	Raquel Gomes Pereira	Portugal	1:08.27
30	3	1	Mercedes Toledo	Venezuela	1:08.30
31	3	3	Kan Cheuk Tung Natalie	Hong Kong	1:08.52
32	6	8	Lin Pei-wun	Chinese Taipei	1:09.01
33	5	9	Ciara Smith	New Zealand	1:09.13
34	3	5	Emily Visagie	South Africa	1:09.46
35	3	0	Rebecca Kamau	Kenya	1:09.47
36	3	7	Tilka Paljk	Zambia	1:11.22
37	2	4	Matelita Buadromo	Fiji	1:12.57
38	2	5	Tilali Scanlan	American Samoa	1:12.72
39	3	9	Cheang Weng Lam	Macau	1:13.12
40	3	8	Anahi Schreuders	Aruba	1:13.41
41	2	8	Jang Myong-gyong	North Korea	1:14.42
42	1	5	Vorleak Sok	Cambodia	1:15.37
43	2	3	Kirsten Fisher-Marsters	Cook Islands	1:16.44
44	2	6	Latroya Pina	Cape Verde	1:16.83
45	1	4	Nooran Ba Matraf	Yemen	1:17.08
46	1	3	Darya Semyonova	Turkmenistan	1:18.73
47	2	2	Rehema Kalate	Papua New Guinea	1:21.48
48	2	1	Bianca Mitchell	Antigua and Barbuda	1:21.87
49	2	7	Lungelo Nxumalo	Eswatini	1:31.73
	4	1	Susann Bjørnsen	Norway	DNS
	4	5	Molly Hannis	United States	DNS

The semifinals were started on 14 December at 20:42.[3]

The final was held on 15 December at 20:37.[4]

Rank	Lane	Name	Nationality	Time	Notes
	4	Alia Atkinson	Jamaica	1:03.51
	3	Katie Meili	United States	1:03.63
	5	Jessica Hansen	Australia	1:04.61
4	7	Martina Carraro	Italy	1:04.73
5	1	Jenna Laukkanen	Finland	1:04.96
6	6	Shi Jinglin	China	1:05.10
7	2	Fanny Lecluyse	Belgium	1:05.13
8	8	Kanako Watanabe	Japan	1:05.34