Swimming at the 2024 Summer Olympics – Women's 400 metre individual medley

Women's 400 metre individual medley at the Games of the XXXIII Olympiad
Venue	Olympic Aquatics Centre, Paris La Défense Arena
Dates	29 July 2024 (Heats and Final)
Competitors	16 from 11 nations
Winning time	4:27.71
Medalists
Summer McIntosh  Canada Katie Grimes  United States Emma Weyant  United States

The women's 400 metre individual medley event at the 2024 Summer Olympics was held on 29 July 2024 at the Paris Aquatics Centre.

Records

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

World record	Summer McIntosh (CAN)	4:24.38	Toronto, Canada	16 May 2024
Olympic record	Katinka Hosszú (HUN)	4:26.36	Rio de Janeiro, Brazil	6 August 2016

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^
400 m individual medley	4:38.53ª	4:39.92

* 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 two rounds: heats and a final. The swimmers with the best 8 times in the heats 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	Final

Results

Heats

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
1	1	6	Emma Weyant	United States	4:36.27	Q
2	1	4	Katie Grimes	United States	4:37.24	Q
3	2	4	Summer McIntosh	Canada	4:37.35	Q
4	1	5	Freya Colbert	Great Britain	4:37.62	Q
5	2	6	Mio Narita	Japan	4:37.84	Q
6	2	7	Ella Ramsay	Australia	4:39.04	Q
7	2	1	Ellen Walshe	Ireland	4:39.97	Q
8	1	7	Katie Shanahan	Great Britain	4:40.40	Q
9	2	5	Jenna Forrester	Australia	4:40.55
10	2	3	Anastasia Gorbenko	Israel	4:41.64
11	1	1	Ella Jansen	Canada	4:42.06
12	2	8	Emma Carrasco	Spain	4:43.13
13	2	2	Ageha Tanigawa	Japan	4:43.18
14	1	3	Vivien Jackl	Hungary	4:44.47
15	1	2	Sara Franceschi	Italy	4:48.89
16	1	8	Anja Crevar	Serbia	4:49.16

Final

Rank	Lane	Swimmer	Nation	Time	Notes
	3	Summer McIntosh	Canada	4:27.71
	5	Katie Grimes	United States	4:33.40
	4	Emma Weyant	United States	4:34.93
4	6	Freya Colbert	Great Britain	4:35.67
5	7	Ella Ramsay	Australia	4:38.01
6	2	Mio Narita	Japan	4:38.83
7	8	Katie Shanahan	Great Britain	4:40.17
8	1	Ellen Walshe	Ireland	4:40.70