2018 FINA World Swimming Championships (25 m) – Women's 50 metre breaststroke

The heats were started on 11 December at 10:38.[2]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	5	4	Rūta Meilutytė	Lithuania	29.56	Q
2	4	1	Katie Meili	United States	29.94	Q
3	6	2	Martina Carraro	Italy	30.00	Q, NR
	6	4	Alia Atkinson	Jamaica		Q
5	5	5	Ida Hulkko	Finland	30.13	Q
6	6	5	Jenna Laukkanen	Finland	30.19	Q
7	4	2	Miho Teramura	Japan	30.20	Q, NR
	4	6	Jessica Hansen	Australia		Q
9	5	3	Arianna Castiglioni	Italy	30.21	Q
10	6	6	Fanny Lecluyse	Belgium	30.34	Q
11	5	7	Suo Ran	China	30.42	Q
12	4	5	Emily Seebohm	Australia	30.46	Q
13	5	2	Petra Chocová	Czech Republic	30.48	Q
14	5	6	Mariia Temnikova	Russia	30.49	Q
15	4	3	Kim Busch	Netherlands	30.58	Q
16	6	7	Feng Junyang	China	30.69	Q
17	6	8	Jessica Steiger	Germany	30.72
18	5	1	Anna Sztankovics	Hungary	30.76
19	6	3	Susann Bjørnsen	Norway	30.83
20	4	7	Jessica Vall	Spain	30.88
21	3	6	Adelaida Pchelintseva	Kazakhstan	30.96	NR
22	5	0	Cornelia Pammer	Austria	31.00
	6	9	Maria Romanjuk	Estonia
24	4	9	Lisa Mamie	Switzerland	31.04	NR
	5	9	Tatiana Chișca	Moldova
26	3	4	Jenjira Srisaard	Thailand	31.15
27	5	8	Julia Sebastián	Argentina	31.16
28	3	3	Mercedes Toledo	Venezuela	31.19
29	6	1	Vitalina Simonova	Russia	31.20
30	4	8	Andrea Podmaníková	Slovakia	31.34
31	4	0	Niamh Coyne	Ireland	31.42
32	6	0	Lin Pei-wun	Chinese Taipei	31.56
33	3	5	Tilka Paljk	Zambia	31.84
34	3	7	Victoria Russell	Bahamas	32.94
35	3	8	Tilali Scanlan	American Samoa	33.19
36	1	5	Jang Myong-gyong	North Korea	33.35
37	2	8	María José Ribera	Bolivia	33.55
	3	1	Cheang Weng Lam	Macau
39	3	2	Anahi Schreuders	Aruba	33.90
40	3	0	Kirsten Fisher-Marsters	Cook Islands	34.45
41	1	6	Vorleak Sok	Cambodia	34.52
42	2	1	Darya Semyonova	Turkmenistan	35.33
43	1	1	Abiola Ogunbanwo	Nigeria	35.36
44	3	9	Rehema Kalate	Papua New Guinea	36.59
45	2	4	Taeyanna Adams	Federated States of Micronesia	37.00
46	1	2	Angelika Ouedraogo	Burkina Faso	37.73
47	1	8	Ayushma Tuladhar	Nepal	37.91
48	1	4	Karina Klimyk	Tajikistan	39.48
49	2	5	Siri Arun Budcharern	Laos	40.40
50	2	3	Lungelo Nxumalo	Eswatini	41.02
51	1	3	Nafissath Radji	Benin	41.13
52	2	2	Wendy Charles	Solomon Islands	43.12
53	1	0	Roukaya Moussa Mahamane	Niger	44.55
54	2	6	Mariama Touré	Guinea	44.67
55	1	7	Kanu Isha	Sierra Leone	47.89
	2	0	Fatoumata Konate	Mali		DNS
	2	7	Safia Houssein Barkat	Djibouti
	4	4	Molly Hannis	United States
	2	9	Ida Cham	Gambia		DSQ

The semifinals were started on 11 December at 19:26.[3]

The swim-off was held on 11 December at 21:20.[4]

Rank	Lane	Name	Nationality	Time	Notes
1	4	Jessica Hansen	Australia	29.96	Q
2	5	Miho Teramura	Japan	30.14	NR

The final was held on 12 December at 19:41.[5]

Rank	Lane	Name	Nationality	Time	Notes
	4	Alia Atkinson	Jamaica	29.05
	3	Rūta Meilutytė	Lithuania	29.38
	5	Martina Carraro	Italy	29.59	NR
4	6	Jenna Laukkanen	Finland	29.68
5	2	Katie Meili	United States	29.89
6	8	Jessica Hansen	Australia	30.20
7	7	Fanny Lecluyse	Belgium	30.41
8	1	Ida Hulkko	Finland	30.45