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

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

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

World	4:24.38	Summer McIntosh	Canada	Toronto, ON	16 May 2024
Olympic	4:26.36	Katinka Hosszú	Hungary	Rio de Janeiro	6 Aug 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).^[1][2]

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.^[1]

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.^[3]

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 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.

All times are Central European Time (UTC+1)^[4]

Rank	Heat	Lane	Swimmer	Nation	Time	Notes
	1	1	Ella Jansen	Canada
	1	2	Sara Franceschi	Italy
	1	3	Vivien Jackl	Hungary
	1	4	Katie Grimes	United States
	1	5	Freya Colbert	Great Britain
	1	6	Emma Weyant	United States
	1	7	Katie Shanahan	Great Britain
	1	8	Anja Crevar	Serbia
	2	1	Ellen Walshe	Ireland
	2	2	Ageha Tanigawa	Japan
	2	3	Anastasia Gorbenko	Israel
	2	4	Summer McIntosh	Canada
	2	5	Jenna Forrester	Australia
	2	6	Mio Narita	Japan
	2	7	Ella Ramsay	Australia
	2	8	Emma Carrasco	Spain