Men's 100 metre backstroke at the Games of the XXXIII Olympiad
Venue	Olympic Aquatics Centre, Paris La Défense Arena
Dates	28 July 2024 (Heats and Semis) 29 July 2024 (Final)
Competitors	46 from 36 nations
Winning time	52:00.00
Medalists
Thomas Ceccon  Italy Xu Jiayu  China Ryan Murphy  United States
← 2020 2028 →

Swimming at the 2024 Summer Olympics
Qualification
Freestyle
50 m	men		women
100 m	men		women
200 m	men		women
400 m	men		women
800 m	men		women
1500 m	men		women
Backstroke
100 m	men		women
200 m	men		women
Breaststroke
100 m	men		women
200 m	men		women
Butterfly
100 m	men		women
200 m	men		women
Individual medley
200 m	men		women
400 m	men		women
Freestyle relay
4 × 100 m	men		women
4 × 200 m	men		women
Medley relay
4 × 100 m	men	mixed	women
Marathon
10 km	men		women
v t e

The men's 100 metre backstroke event at the 2024 Summer Olympics was held from 28 to 29 July 2024 at the Paris Aquatics Centre.^[1]

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

World record	Thomas Ceccon (ITA)	51.60	Budapest, Hungary	20 June 2022
Olympic record	Ryan Murphy (USA)	51.85	Rio de Janeiro, Brazil	13 August 2016

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).^[2][3]

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.^[2]

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.^[4]

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

* 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.

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.

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

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
1	5	2	Hubert Kós	Hungary	52.78	Q, NR
2	5	6	Pieter Coetze	South Africa	52.90	Q
3	6	5	Apostolos Christou	Greece	52.95	Q
4	6	4	Ryan Murphy	United States	53.06	Q
5	4	6	Ksawery Masiuk	Poland	53.08	Q
6	4	3	Yohann Ndoye-Brouard	France	53.20	Q
	5	4	Xu Jiayu	China	53.20	Q
8	5	3	Evangelos Makrygiannis	Greece	53.24	Q
9	5	5	Hunter Armstrong	United States	53.34	Q
10	4	2	Miroslav Knedla	Czech Republic	53.41	Q
11	6	3	Oliver Morgan	Great Britain	53.44	Q
12	4	4	Thomas Ceccon	Italy	53.45	Q
13	6	6	Mewen Tomac	France	53.51	Q
14	4	5	Hugo González	Spain	53.68	Q
15	6	8	Blake Tierney	Canada	53.89	Q
16	6	2	Jonathon Marshall	Great Britain	53.93	Q
17	6	7	Roman Mityukov	Switzerland	53.94
18	4	1	Ole Braunschweig	Germany	53.95
19	5	7	Ádám Jászó	Hungary	53.97
20	4	8	Javier Acevedo	Canada	54.19
21	3	1	Kai van Westering [nl]	Netherlands	54.21
	5	1	Isaac Cooper	Australia	54.21
23	4	7	Michele Lamberti	Italy	54.22
24	3	7	Oleksandr Zheltyakov	Ukraine	54.32
25	6	1	Bradley Woodward	Australia	54.34
26	3	5	Thierry Bollin	Switzerland	54.35
27	2	8	Maximillian Wilson	Virgin Islands	54.49
28	3	4	Adam Maraana	Israel	54.61
29	3	6	Marek Ulrich	Germany	54.63
30	5	8	Lee Ju-ho	South Korea	54.65
31	3	2	Riku Matsuyama	Japan	54.71
32	3	3	João Costa	Portugal	54.90
33	2	3	Srihari Nataraj	India	55.01
	2	4	Kane Follows	New Zealand	55.01
35	3	8	Ulises Saravia	Argentina	55.03
36	2	6	Bernhard Reitshammer	Austria	55.13
37	2	2	Anthony Rincón	Colombia	55.42
41	2	7	Noe Pantskhava	Georgia	56.46
38	2	1	Yeziel Morales	Puerto Rico	55.76
39	1	4	Jack Harvey	Bermuda	55.78
40	2	5	Berke Saka	Turkey	55.85
42	1	3	Alexis Kpadi	Benin	57.61
43	1	5	Yazan Al-Bawwab	Palestine	58.26
44	1	6	Zackary Gresham	Grenada	58.92
45	1	7	Zeke Chan	Brunei	1:00.38
46	1	2	Alan Uhi	Tonga	1:00.62

^[5][6]

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

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
1	2	6	Xu Jiayu	China	52.02	Q
2	1	7	Thomas Ceccon	Italy	52.58	Q
3	1	3	Yohann Ndoye-Brouard	France	52.63	Q
	1	4	Pieter Coetze	South Africa	52.63	Q, AF
5	1	5	Ryan Murphy	United States	52.72	Q
6	2	5	Apostolos Christou	Greece	52.77	Q
7	2	7	Oliver Morgan	Great Britain	52.85	Q
8	1	1	Hugo González	Spain	52.95	Q
9	1	6	Evangelos Makrygiannis	Greece	52.97
10	2	4	Hubert Kós	Hungary	52.98
11	2	2	Hunter Armstrong	United States	53.11
12	1	2	Miroslav Knedla	Czech Republic	53.44
13	2	3	Ksawery Masiuk	Poland	53.44
14	1	8	Jonathon Marshall	Great Britain	53.46
15	2	1	Mewen Tomac	France	53.63
16	2	8	Blake Tierney	Canada	53.71

^[7][8]

Rank	Lane	Swimmer	Nation	Time	Notes
	5	Thomas Ceccon	Italy	52.00
	4	Xu Jiayu	China	52.32
	2	Ryan Murphy	United States	52.39
4	7	Apostolos Christou	Greece	52.41
5	6	Pieter Coetze	South Africa	52.58	AF
6	8	Hugo González	Spain	52.73
7	3	Yohann Ndoye-Brouard	France	52.77
8	1	Oliver Morgan	Great Britain	52.84

^[9]