Swimming at the 2024 World Aquatics Championships – Women's 100 metre butterfly

Prior to the competition, the existing world and championship records were as follows.^[3]

World record	Sarah Sjöström (SWE)	55.48	Rio de Janeiro, Brazil	7 August 2016
Competition record	Sarah Sjöström (SWE)	55.53	Budapest, Hungary	24 July 2017

The heats were started on 11 February at 10:18.^[4]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	3	4	Angelina Köhler	Germany	56.41	Q, NR
2	4	4	Louise Hansson	Sweden	57.45	Q
3	3	5	Erin Gallagher	South Africa	57.59	Q, AF
4	5	5	Brianna Throssell	Australia	57.78	Q
5	5	4	Claire Curzan	United States	57.94	Q
6	4	5	Alexandria Perkins	Australia	58.10	Q
7	5	6	Chiharu Iitsuka	Japan	58.35	Q
8	5	3	Barbora Seemanová	Czech Republic	58.37	Q
9	4	2	Helena Rosendahl Bach	Denmark	58.67	Q
10	4	3	Anna Ntountounaki	Greece	58.72	Q
11	4	6	Nagisa Ikemoto	Japan	58.73	Q
12	4	0	Anastasiya Kuliashova		58.94	Q
13	3	7	Farida Osman	Egypt	59.11	Q
14	5	2	Amina Kajtaz	Croatia	59.14	Q
15	3	3	Katerine Savard	Canada	59.24	Q
16	3	1	Park Jung-won	South Korea	59.32	Q
17	3	6	Paulina Peda	Poland	59.47
18	3	2	Quah Jing Wen	Singapore	59.61
19	4	1	Paula Juste	Spain	59.82
20	4	9	Gong Zhenqi	China	59.87
21	4	7	Mariana Pacheco	Portugal	59.93
22	5	9	Laura Lahtinen	Finland	1:00.06
23	5	1	Valentina Becerra	Colombia	1:00.34
24	3	8	Sofia Spodarenko	Kazakhstan	1:00.39
24	4	8	María José Mata Cocco	Mexico	1:00.39
26	5	8	Natalie Kan	Hong Kong	1:00.50
27	5	7	Sonia Laquintana	Italy	1:01.31
28	3	0	Kamonchanok Kwanmuang	Thailand	1:01.45
29	3	9	Jessica Calderbank	Jamaica	1:01.82
30	5	0	Luana Alonso	Paraguay	1:02.33
31	2	5	Varsenik Manucharyan	Armenia	1:02.59
32	2	3	Ana Nizharadze	Georgia	1:03.28
33	2	6	Oumy Diop	Senegal	1:03.97
34	2	7	Lia Lima	Angola	1:03.98
35	2	2	Imara Thorpe	Kenya	1:04.81
36	2	8	María Fernández	Dominican Republic	1:05.08
37	2	1	Cheang Weng Chi	Macau	1:05.11
38	2	0	Rebecca Najem	Lebanon	1:05.57
39	1	7	Mia Laban	Cook Islands	1:07.35
40	2	9	Amaya Bollinger	Guam	1:08.15
41	1	4	Sara Akasha	United Arab Emirates	1:11.72
42	1	5	Naekeisha Louis	Saint Lucia	1:14.92
43	1	6	Sonia Khatun	Bangladesh	1:17.86
44	1	3	Amylia Chali	Tanzania	1:19.92
45	1	2	Leena Mohamedahmed	Sudan	1:36.65
–	2	4	María Schutzmeier	Nicaragua	Did not start

The semifinals were started on 11 February at 19:12.^[5]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	2	4	Angelina Köhler	Germany	56.11	Q, NR
2	2	3	Claire Curzan	United States	57.06	Q
3	1	5	Brianna Throssell	Australia	57.22	Q
4	1	4	Louise Hansson	Sweden	57.28	Q
5	1	2	Anna Ntountounaki	Greece	57.86	Q
6	2	5	Erin Gallagher	South Africa	57.92	Q
7	2	6	Chiharu Iitsuka	Japan	58.01	Q
8	1	3	Alexandria Perkins	Australia	58.05	Q
9	2	2	Helena Rosendahl Bach	Denmark	58.15
10	1	6	Barbora Seemanová	Czech Republic	58.28
11	2	7	Nagisa Ikemoto	Japan	58.61
12	2	8	Katerine Savard	Canada	58.73
13	1	8	Park Jung-won	South Korea	58.75
14	1	7	Anastasiya Kuliashova		59.03
15	2	1	Farida Osman	Egypt	59.12
16	1	1	Amina Kajtaz	Croatia	59.22

The final was held on 12 February at 19:09.^[6]

Rank	Lane	Name	Nationality	Time	Notes
	4	Angelina Köhler	Germany	56.28
	5	Claire Curzan	United States	56.61
	6	Louise Hansson	Sweden	56.94
4	3	Brianna Throssell	Australia	56.97
5	2	Anna Ntountounaki	Greece	57.62
6	8	Alexandria Perkins	Australia	57.68
7	7	Erin Gallagher	South Africa	57.83
8	1	Chiharu Iitsuka	Japan	58.23