Swimming at the 2024 Summer Olympics – Women's 100 metre backstroke

Women's 100 metre backstroke at the Games of the XXXIII Olympiad
Venue	Olympic Aquatics Centre, Paris La Défense Arena
Dates	29 July 2024 (heats and semifinals) 30 July 2024 (final)
Competitors	36 from 29 nations
Winning time	57.33
Medalists
Kaylee McKeown  Australia Regan Smith  United States Katharine Berkoff  United States

The women's 100 metre backstroke event at the 2024 Summer Olympics was held from 29 to 30 July 2024 at the Paris Aquatics Centre.

Records

Prior to this competition, the existing world and Olympic records were as follows.

World record	Regan Smith (USA)	57.13	Indianapolis, United States	18 June 2024
Olympic record	Kaylee McKeown (AUS)	57.47	Tokyo, Japan	27 July 2021

The following record was established during the competition:

Date	Event	Swimmer	Nation	Time	Record
30 July	Final	Kaylee McKeown	Australia	57.33	OR

Qualification

Main article: Swimming at the 2024 Summer Olympics – Qualification

A National Olympic Committee (NOC) may enter a maximum of two qualified athletes in each individual event, but only if both of them have attained the Olympic Qualifying Time (OQT). One athlete per event can potentially enter if they meet the Olympic Consideration Time (OCT), or if the total quota of 852 athletes has not been targeted. NOCs may also permit swimmers regardless of time (one per gender) under a Universality place since they have no swimmers attaining either of the standard entry times (OQT/OCT).

Following the end of the qualification window, World Aquatics will assess the number of swimmers who have achieved the OQT, the number of relay-only swimmers, and the number of Universality places, before inviting those with OCT to fulfill the total quota of 852. Additionally, OCT places will be distributed by event according to the position of the World Aquatics Rankings during the qualifying deadline.

Time standards

The qualifying time standards must be obtained at the 2023 and 2024 World Championships, continental championships, continental swimming meets, national championships and selection trials, and various international meets approved by World Aquatics in the period between 1 March 2023 and 23 June 2024.

The following table outlines the qualifying time standards for Paris 2024 for this event:

Women's events
Event	OQT*	OCT^
100 m backstroke	59.99	1:00.29

* OQTs correspond to the time achieved by a fourteenth-place swimmer in his or her respective preliminary heat of each event at the previous Games.

ª Because the fourteenth-place swimmer achieved a standard slower than the OQT in Tokyo 2020, the OQT used at the previous Games will remain constant.

^ OCTs are derived by adding 0.5% of the OQT standard.

Competition format

The competition consists of three rounds: heats, semifinals, and a final. The swimmers with the best 16 times in the heats advance to the semifinals. The swimmers with the best 8 times in the semifinals advance to the final. Swim-offs are used as necessary to break ties for advancement to the next round.

Schedule

All times are Central European Summer Time (UTC+2)

Date	Time	Round
29 July 2024	10:00	Heats
	19:37	Semifinals
30 July 2024	17:30	Final

Results

Heats

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
1	3	4	Katharine Berkoff	United States	57.99	Q
2	5	4	Regan Smith	United States	58.45	Q
3	4	4	Kaylee McKeown	Australia	58.48	Q
4	5	5	Kylie Masse	Canada	59.06	Q
5	3	5	Emma Terebo	France	59.10	Q
6	5	6	Béryl Gastaldello	France	59.31	Q
7	4	5	Iona Anderson	Australia	59.37	Q
8	4	2	Carmen Weiler	Spain	59.57	Q, NR
9	4	7	Roos Vanotterdijk	Belgium	59.68	Q
10	3	7	Kira Toussaint	Netherlands	59.84	Q
11	4	3	Wan Letian	China	59.87	Q
12	5	3	Ingrid Wilm	Canada	1:00.06	Q
13	5	2	Maaike de Waard	Netherlands	1:00.12	Q
14	4	6	Wang Xue'er	China	1:00.15	Q
15	4	1	Louise Hansson	Sweden	1:00.26	Q
16	3	3	Danielle Hill	Ireland	1:00.40	Q
17	5	7	Adela Piskorska	Poland	1:00.47
18	3	2	Kathleen Dawson	Great Britain	1:00.69
19	3	6	Medi Eira Harris	Great Britain	1:00.85
20	5	1	Anastasiya Shkurdai	Individual Neutral Athletes	1:00.94
21	3	1	Celia Pulido	Mexico	1:01.10
22	5	8	Nika Sharafutdinova	Ukraine	1:01.47
23	4	8	Emma Harvey	Bermuda	1:01.78
24	3	8	Gabriela Georgieva	Bulgaria	1:02.16
25	2	5	Aviv Barzelay	Israel	1:02.30
26	2	4	Xeniya Ignatova	Kazakhstan	1:02.51
27	2	6	Zuri Ferguson	Trinidad and Tobago	1:02.75
28	2	2	Lucero Mejía	Guatemala	1:03.42
29	2	3	Cindy Cheung	Hong Kong	1:03.45
30	1	4	Ganga Senavirathne	Sri Lanka	1:04.26
31	2	8	Amani Al-Obaidli	Bahrain	1:04.27
32	2	1	Celina Márquez	El Salvador	1:04.55
33	2	7	Elizabeth Jiménez	Dominican Republic	1:04.99
34	1	3	Denise Donelli	Mozambique	1:08.73
35	1	5	Aýnura Primowa	Turkmenistan	1:10.17
36	1	6	Maleek Al-Mukhtar	Libya	1:10.99

Semifinals

The swimmers with the best 8 times, regardless of heat, advanced to the final.

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
1	1	4	Regan Smith	United States	57.97	Q
2	2	5	Kaylee McKeown	Australia	57.99	Q
3	2	4	Katharine Berkoff	United States	58.27	Q
4	2	6	Iona Anderson	Australia	58.63	Q
5	1	5	Kylie Masse	Canada	58.82	Q
6	1	7	Ingrid Wilm	Canada	59.10	Q
7	1	3	Béryl Gastaldello	France	59.29	Q
8	2	3	Emma Terebo	France	59.50	Q
9	1	6	Carmen Weiler	Spain	59.72
10	2	2	Roos Vanotterdijk	Belgium	59.86
11	1	1	Wang Xue'er	China	59.89
12	2	7	Wan Letian	China	1:00.06
13	2	1	Maaike de Waard	Netherlands	1:00.22
14	1	2	Kira Toussaint	Netherlands	1:00.37
15	2	8	Louise Hansson	Sweden	1:00.47
16	1	8	Danielle Hill	Ireland	1:00.80

Final

Rank	Lane	Swimmer	Nation	Time	Notes
	5	Kaylee McKeown	Australia	57.33	OR, =OC
	4	Regan Smith	United States	57.66
	3	Katharine Berkoff	United States	57.98
4	2	Kylie Masse	Canada	58.29
5	6	Iona Anderson	Australia	58.98
6	7	Ingrid Wilm	Canada	59.25
7	8	Emma Terebo	France	59.40
8	1	Béryl Gastaldello	France	59.80