# Swimming at the 2020 Summer Olympics

The swimming competitions at the 2020 Summer Olympics in Tokyo were due to take place from 25 July to 6 August 2020 at the Olympic Aquatics Centre. Due to the COVID-19 pandemic, the games were postponed to 2021. However, their official name remained 2020 Summer Olympics with swimming events set for 24 July–1 August 2021 and marathon swimming set for 4–5 August 2021.
Swimming featured a record total of 37 events (18 for each gender and 1 mixed), with the addition of the men's 800 m freestyle, women's 1500 m freestyle, and the mixed 4 × 100 m medley relay.

## Events

Swimming at the 2020 Olympics featured a total of 37 events (18 each for men and women and 1 mixed event), including two 10 km open-water marathons. This was a slight increase from the 34 events contested in the previous Olympic Games. The following events were contested (all pool events are long course, and distances are in meters unless stated):
* Freestyle: 50, 100, 200, 400, 800, and 1,500;
* Backstroke: 100 and 200;
* Breaststroke: 100 and 200;
* Butterfly: 100 and 200;
* Individual medley: 200 and 400;
* Relays: 4 × 100 free, 4 × 200 free; 4 × 100 medley (men's, women's, and mixed)
* Marathon: 10 kilometres

### Schedule

Unlike the previous Olympics, swimming program schedule occurred in two segments. For the pool events, similar to the case of the 2008 Games, prelims were held in the evening, with semifinals and final in the following morning session, spanning a day between semifinals and finals in those events with semifinals. The shift of the normal morning prelims and evening finals (to evening prelims and morning finals) occurred for these Games due to the prior request made by US broadcaster NBC (due to the substantial fees NBC has paid for rights to the Olympics, the IOC has allowed NBC to have influence on event scheduling to maximize U.S. television ratings when possible; NBC agreed to a $7.75 billion contract extension on May 7, 2014, to air the Olympics through the 2032 games and is also one of the major sources of revenue for the IOC), so that the finals from the event could be shown live in the United States.
Men :
| Date → | Jul 24 | Jul 24 | Jul 25 | Jul 25 | Jul 26 | Jul 26 | Jul 27 | Jul 27 | Jul 28 | Jul 28 | Jul 29 | Jul 29 | Jul 30 | Jul 30 | Jul 31 | Jul 31 | Aug 1 | Aug 1 | Aug 5 | Aug 5 |
| Event ↓ | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E |
| 50 m freestyle | | | | | | | | | | | | | | H | ½ | | F | | | |
| 100 m freestyle | | | | | | | | H | ½ | | F | | | | | | | | | |
| 200 m freestyle | | | | H | ½ | | F | | | | | | | | | | | | | |
| 400 m freestyle | | H | F | | | | | | | | | | | | | | | | | |
| 800 m freestyle | | | | | | | | H | | | F | | | | | | | | | |
| 1500 m freestyle | | | | | | | | | | | | | | H | | | F | | | |
| 100 m backstroke | | | | H | ½ | | F | | | | | | | | | | | | | |
| 200 m backstroke | | | | | | | | | | H | ½ | | F | | | | | | | |
| 100 m breaststroke | | H | ½ | | F | | | | | | | | | | | | | | | |
| 200 m breaststroke | | | | | | | | H | ½ | | F | | | | | | | | | |
| 100 m butterfly | | | | | | | | | | | | H | ½ | | F | | | | | |
| 200 m butterfly | | | | | | H | ½ | | F | | | | | | | | | | | |
| 200 m individual medley | | | | | | | | | | H | ½ | | F | | | | | | | |
| 400 m individual medley | | H | F | | | | | | | | | | | | | | | | | |
| 4 × 100 m freestyle relay | | | | H | F | | | | | | | | | | | | | | | |
| 4 × 200 m freestyle relay | | | | | | | | H | F | | | | | | | | | | | |
| 4 × 100 m medley relay | | | | | | | | | | | | | | H | | | F | | | |
| 10 km open water | | | | | | | | | | | | | | | | | | | F | |
Women :
| Date → | Jul 24 | Jul 24 | Jul 25 | Jul 25 | Jul 26 | Jul 26 | Jul 27 | Jul 27 | Jul 28 | Jul 28 | Jul 29 | Jul 29 | Jul 30 | Jul 30 | Jul 31 | Jul 31 | Aug 1 | Aug 1 | Aug 4 | Aug 4 |
| Event ↓ | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E |
| 50 m freestyle | | | | | | | | | | | | | | H | ½ | | F | | | |
| 100 m freestyle | | | | | | | | | | H | ½ | | F | | | | | | | |
| 200 m freestyle | | | | | | H | ½ | | F | | | | | | | | | | | |
| 400 m freestyle | | | | H | F | | | | | | | | | | | | | | | |
| 800 m freestyle | | | | | | | | | | | | H | | | F | | | | | |
| 1500 m freestyle | | | | | | H | | | F | | | | | | | | | | | |
| 100 m backstroke | | | | H | ½ | | F | | | | | | | | | | | | | |
| 200 m backstroke | | | | | | | | | | | | H | ½ | | F | | | | | |
| 100 m breaststroke | | | | H | ½ | | F | | | | | | | | | | | | | |
| 200 m breaststroke | | | | | | | | | | H | ½ | | F | | | | | | | |
| 100 m butterfly | | H | ½ | | F | | | | | | | | | | | | | | | |
| 200 m butterfly | | | | | | | | H | ½ | | F | | | | | | | | | |
| 200 m individual medley | | | | | | H | ½ | | F | | | | | | | | | | | |
| 400 m individual medley | | H | F | | | | | | | | | | | | | | | | | |
| 4 × 100 m freestyle relay | | H | F | | | | | | | | | | | | | | | | | |
| 4 × 200 m freestyle relay | | | | | | | | | | H | F | | | | | | | | | |
| 4 × 100 m medley relay | | | | | | | | | | | | | | H | | | F | | | |
| 10 km open water | | | | | | | | | | | | | | | | | | | F | |
Mixed :
| Date → | Jul 24 | Jul 24 | Jul 25 | Jul 25 | Jul 26 | Jul 26 | Jul 27 | Jul 27 | Jul 28 | Jul 28 | Jul 29 | Jul 29 | Jul 30 | Jul 30 | Jul 31 | Jul 31 | Aug 1 | Aug 1 | Aug 4 | Aug 4 |
| Event ↓ | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E | M | E |
| 4 × 100 m medley relay | | | | | | | | | | | | H | | | F | | | | | |

## Qualification
### Swimming – individual events

FINA establishes qualifying times for individual events. The time standards consisted of two types: an "Olympic Qualifying Time" (OQT) and an "Olympic Selection time" (OST). Each country was able to enter up to two swimmers per event, provided both swimmers met the (faster) qualifying time. A country was able to enter one swimmer per event that met the invitation standard. Any swimmer who met the "qualifying" time was entered in the event for the Games; a swimmer meeting the "invitation" standard was eligible for entry, and their entry was allotted/filled in by ranking. If a country has no swimmers who meet either of the qualifying standards, it may have entered one male and one female. A country that did not receive an allocation spot but had at least one swimmer who met a qualifying standard might have entered the swimmer with the highest ranking.

### Swimming – relay events

Each relay event features 16 teams, composed of:
* 12 teams including the top-12 finishers at the 2019 World Championships in each relay event.
* 4 teams including the 4 fastest non-qualified teams, based on times in the 15-months preceding the Olympics.

### Open-water swimming

The men's and women's 10 km races featured 25 swimmers:
* 10: the top-10 finishers in the 10 km races at the 2019 World Championships
* 9: the top-9 finishers at the 2020 Olympic Marathon Swim Qualifier
* 5: one representative from each FINA continent (Africa, the Americas, Asia, Europe, and Oceania).
* 1: from the host nation (Japan) if not qualified by other means. If Japan already contained a qualifier in the race, this spot had been allocated back into the general pool from the 2020 Olympic qualifier race.

## Medal summary
### Medal table

* Host nation (Japan)
| Rank | NOC | Gold | Silver | Bronze | Total |
| 1 | United States | 11 | 10 | 9 | 30 |
| 2 | Australia | 9 | 3 | 9 | 21 |
| 3 | Great Britain | 4 | 3 | 1 | 8 |
| 4 | China | 3 | 2 | 1 | 6 |
| 5 | ROC | 2 | 2 | 1 | 5 |
| 6 | Japan* | 2 | 1 | 0 | 3 |
| 7 | Canada | 1 | 3 | 2 | 6 |
| 8 | Hungary | 1 | 2 | 0 | 3 |
| 9 | South Africa | 1 | 1 | 0 | 2 |
| 10 | Brazil | 1 | 0 | 2 | 3 |
| 10 | Germany | 1 | 0 | 2 | 3 |
| 12 | Tunisia | 1 | 0 | 0 | 1 |
| 13 | Netherlands | 0 | 3 | 0 | 3 |
| 14 | Italy | 0 | 2 | 5 | 7 |
| 15 | Hong Kong | 0 | 2 | 0 | 2 |
| 16 | Ukraine | 0 | 1 | 1 | 2 |
| 17 | France | 0 | 1 | 0 | 1 |
| 17 | Sweden | 0 | 1 | 0 | 1 |
| 19 | Switzerland | 0 | 0 | 2 | 2 |
| 20 | Denmark | 0 | 0 | 1 | 1 |
| 20 | Finland | 0 | 0 | 1 | 1 |
| Totals (21 entries) | Totals (21 entries) | 37 | 37 | 37 | 111 |

### Men's events

| Games | Gold | Gold | Silver | Silver | Bronze | Bronze |
| 50 m freestyle details | Caeleb Dressel United States | 21.07 OR | Florent Manaudou France | 21.55 | Bruno Fratus Brazil | 21.57 |
| 100 m freestyle details | Caeleb Dressel United States | 47.02 OR | Kyle Chalmers Australia | 47.08 | Kliment Kolesnikov ROC | 47.44 |
| 200 m freestyle details | Thomas Dean Great Britain | 1:44.22 NR | Duncan Scott Great Britain | 1:44.26 | Fernando Scheffer Brazil | 1:44.66 SA |
| 400 m freestyle details | Ahmed Hafnaoui Tunisia | 3:43.36 | Jack McLoughlin Australia | 3:43.52 | Kieran Smith United States | 3:43.94 |
| 800 m freestyle details | Bobby Finke United States | 7:41.87 NR | Gregorio Paltrinieri Italy | 7:42.11 | Mykhailo Romanchuk Ukraine | 7:42.33 |
| 1500 m freestyle details | Bobby Finke United States | 14:39.65 | Mykhailo Romanchuk Ukraine | 14:40.66 | Florian Wellbrock Germany | 14:40.91 |
| 100 m backstroke details | Evgeny Rylov ROC | 51.98 ER | Kliment Kolesnikov ROC | 52.00 | Ryan Murphy United States | 52.19 |
| 200 m backstroke details | Evgeny Rylov ROC | 1:53.27 OR | Ryan Murphy United States | 1:54.15 | Luke Greenbank Great Britain | 1:54.72 |
| 100 m breaststroke details | Adam Peaty Great Britain | 57.37 | Arno Kamminga Netherlands | 58.00 | Nicolò Martinenghi Italy | 58.33 |
| 200 m breaststroke details | Zac Stubblety-Cook Australia | 2:06.38 OR | Arno Kamminga Netherlands | 2:07.01 | Matti Mattsson Finland | 2:07.13 NR |
| 100 m butterfly details | Caeleb Dressel United States | 49.45 WR | Kristóf Milák Hungary | 49.68 ER | Noè Ponti Switzerland | 50.74 NR |
| 200 m butterfly details | Kristóf Milák Hungary | 1:51.25 OR | Tomoru Honda Japan | 1:53.73 | Federico Burdisso Italy | 1:54.45 |
| 200 m individual medley details | Wang Shun China | 1:55.00 AS | Duncan Scott Great Britain | 1:55.28 NR | Jérémy Desplanches Switzerland | 1:56.17 NR |
| 400 m individual medley details | Chase Kalisz United States | 4:09.42 | Jay Litherland United States | 4:10.28 | Brendon Smith Australia | 4:10.38 |
| 4 × 100 m freestyle relay details | United States Caeleb Dressel (47.26) Blake Pieroni (47.58) Bowe Becker (47.44) Zach Apple (46.69) Brooks Curry | 3:08.97 | Italy Alessandro Miressi (47.72) Thomas Ceccon (47.45) Lorenzo Zazzeri (47.31) Manuel Frigo (47.63) Santo Condorelli | 3:10.11 NR | Australia Matthew Temple (48.07) Zac Incerti (47.55) Alexander Graham (48.16) Kyle Chalmers (46.44) Cameron McEvoy | 3:10.22 |
| 4 × 200 m freestyle relay details | Great Britain Thomas Dean (1:45.72) James Guy (1:44.40) Matthew Richards (1:45.01) Duncan Scott (1:43.45) Calum Jarvis | 6:58.58 ER | ROC Martin Malyutin (1:45.69) Ivan Girev (1:45.63) Evgeny Rylov (1:45.26) Mikhail Dovgalyuk (1:45.23) Aleksandr Krasnykh Mikhail Vekovishchev | 7:01.81 | Australia Alexander Graham (1:46.00) Kyle Chalmers (1:45.35) Zac Incerti (1:45.75) Thomas Neill (1:44.74) Mack Horton Elijah Winnington | 7:01.84 |
| 4 × 100 m medley relay details | United States Ryan Murphy (52.31) Michael Andrew (58.49) Caeleb Dressel (49.03) Zach Apple (46.95) Hunter Armstrong Andrew Wilson Tom Shields Blake Pieroni | 3:26.78 WR | Great Britain Luke Greenbank (53.63) Adam Peaty (56.53) James Guy (50.27) Duncan Scott (47.08) James Wilby | 3:27.51 ER | Italy Thomas Ceccon (52.52) Nicolò Martinenghi (58.11) Federico Burdisso (51.07) Alessandro Miressi (47.47) | 3:29.17 NR |
| 10 km open water details | Florian Wellbrock Germany | 1:48:33.7 | Kristóf Rasovszky Hungary | 1:48:59.0 | Gregorio Paltrinieri Italy | 1:49:01.1 |
| AF African Record | AM Americas Record | SA South American Record | AS Asian Record | ER European Record | OC Oceanian Record | OR Olympic Record | WJR World Junior Record | WR World Record NR National Record (any World Record is necessarily also an Olympic, area, and national record. Area records (for continental regions) are also national records) |||||| |
$^a$ Swimmers who participated in the heats only and received medals.

### Women's events

| Games | Gold | Gold | Silver | Silver | Bronze | Bronze |
| 50 m freestyle details | Emma McKeon Australia | 23.81 OR | Sarah Sjöström Sweden | 24.07 | Pernille Blume Denmark | 24.21 |
| 100 m freestyle details | Emma McKeon Australia | 51.96 OR, OC | Siobhán Haughey Hong Kong | 52.27 AS | Cate Campbell Australia | 52.52 |
| 200 m freestyle details | Ariarne Titmus Australia | 1:53.50 OR | Siobhán Haughey Hong Kong | 1:53.92 AS | Penny Oleksiak Canada | 1:54.70 |
| 400 m freestyle details | Ariarne Titmus Australia | 3:56.69 OC | Katie Ledecky United States | 3:57.36 | Li Bingjie China | 4:01.08 AS |
| 800 m freestyle details | Katie Ledecky United States | 8:12.57 | Ariarne Titmus Australia | 8:13.83 OC | Simona Quadarella Italy | 8:18.35 |
| 1500 m freestyle details | Katie Ledecky United States | 15:37.34 | Erica Sullivan United States | 15:41.41 | Sarah Köhler Germany | 15:42.91 NR |
| 100 m backstroke details | Kaylee McKeown Australia | 57.47 OR | Kylie Masse Canada | 57.72 | Regan Smith United States | 58.05 |
| 200 m backstroke details | Kaylee McKeown Australia | 2:04.68 | Kylie Masse Canada | 2:05.42 NR | Emily Seebohm Australia | 2:06.17 |
| 100 m breaststroke details | Lydia Jacoby United States | 1:04.95 | Tatjana Schoenmaker South Africa | 1:05.22 | Lilly King United States | 1:05.54 |
| 200 m breaststroke details | Tatjana Schoenmaker South Africa | 2:18.95 WR | Lilly King United States | 2:19.92 | Annie Lazor United States | 2:20.84 |
| 100 m butterfly details | Maggie Mac Neil Canada | 55.59 AM | Zhang Yufei China | 55.64 | Emma McKeon Australia | 55.72 OC |
| 200 m butterfly details | Zhang Yufei China | 2:03.86 OR | Regan Smith United States | 2:05.30 | Hali Flickinger United States | 2:05.65 |
| 200 m individual medley details | Yui Ohashi Japan | 2:08.52 | Alex Walsh United States | 2:08.65 | Kate Douglass United States | 2:09.04 |
| 400 m individual medley details | Yui Ohashi Japan | 4:32.08 | Emma Weyant United States | 4:32.76 | Hali Flickinger United States | 4:34.90 |
| 4 × 100 m freestyle relay details | Australia Bronte Campbell (53.01) Meg Harris (53.09) Emma McKeon (51.35) Cate Campbell (52.24) Mollie O'Callaghan Madison Wilson | 3:29.69 WR | Canada Kayla Sanchez (53.42) Maggie Mac Neil (53.47) Rebecca Smith (53.63) Penny Oleksiak (52.26) Taylor Ruck | 3:32.78 | United States Erika Brown (54.02) Abbey Weitzeil (52.68) Natalie Hinds (53.15) Simone Manuel (52.96) Catie DeLoof Allison Schmitt Olivia Smoliga | 3:32.81 |
| 4 × 200 m freestyle relay details | China Yang Junxuan (1:54.37) Tang Muhan (1:55.00) Zhang Yufei (1:55.66) Li Bingjie (1:55.30) Dong Jie Zhang Yifan | 7:40.33 WR | United States Allison Schmitt (1:56.34) Paige Madden (1:55.25) Katie McLaughlin (1:55.38) Katie Ledecky (1:53.76) Brooke Forde Bella Sims | 7:40.73 AM | Australia Ariarne Titmus (1:54.51) Emma McKeon (1:55.31) Madison Wilson (1:55.62) Leah Neale (1:55.85) Tamsin Cook Meg Harris Mollie O'Callaghan Brianna Throssell | 7:41.29 OC |
| 4 × 100 m medley relay details | Australia Kaylee McKeown (58.01) Chelsea Hodges (1:05.57) Emma McKeon (55.91) Cate Campbell (52.11) Emily Seebohm Brianna Throssell Mollie O'Callaghan | 3:51.60 OR, OC | United States Regan Smith (58.05) Lydia Jacoby (1:05.03) Torri Huske (56.16) Abbey Weitzeil (52.49) Rhyan White Lilly King Claire Curzan Erika Brown | 3:51.73 | Canada Kylie Masse (57.90) Sydney Pickrem (1:07.17) Maggie Mac Neil (55.27) Penny Oleksiak (52.26) Taylor Ruck Kayla Sanchez | 3:52.60 NR |
| 10 km open water details | Ana Marcela Cunha Brazil | 1:59:30.8 | Sharon van Rouwendaal Netherlands | 1:59:31.7 | Kareena Lee Australia | 1:59:32.5 |
| AF African Record | AM Americas Record | SA South American Record | AS Asian Record | ER European Record | OC Oceanian Record | OR Olympic Record | WJR World Junior Record | WR World Record NR National Record (any World Record is necessarily also an Olympic, area, and national record. Area records (for continental regions) are also national records) |||||| |
$^b$ Swimmers who participated in the heats only and received medals.

### Mixed events

| Games | Gold | Gold | Silver | Silver | Bronze | Bronze |
| 4 × 100 m medley relay details | Great Britain Kathleen Dawson (58.80) Adam Peaty (56.78) James Guy (50.00) Anna Hopkin (52.00) Freya Anderson | 3:37.58 WR | China Xu Jiayu (52.56) Yan Zibei (58.11) Zhang Yufei (55.48) Yang Junxuan (52.71) | 3:38.86 | Australia Kaylee McKeown (58.14) Zac Stubblety-Cook (58.82) Matthew Temple (50.26) Emma McKeon (51.73) Bronte Campbell Isaac Cooper Brianna Throssell | 3:38.95 |
| AF African Record | AM Americas Record | SA South American Record | AS Asian Record | ER European Record | OC Oceanian Record | OR Olympic Record | WJR World Junior Record | WR World Record NR National Record (any World Record is necessarily also an Olympic, area, and national record. Area records (for continental regions) are also national records) |||||| |
$^c$ Swimmers who participated in the heats only and received medals.

## Records broken
### Men

| Event | Round | Swimmer | Team | Time | Date | Record | Day |
| Men's 800 metre freestyle | Heat 4 | Mykhailo Romanchuk | Ukraine | 7:41.28 | 27 July | OR | 4 |
| Men's 200 metre butterfly | Final | Kristóf Milák | Hungary | 1:51.25 | 28 July | OR | 5 |
| Men's 200 metre breaststroke | Final | Zac Stubblety-Cook | Australia | 2:06.38 | 29 July | OR | 6 |
| Men's 100 metre freestyle | Final | Caeleb Dressel | United States | 47.02 | 29 July | OR | 6 |
| Men's 100 metre butterfly | Heat 8 | Caeleb Dressel | United States | 50.39 | 29 July | =OR | 6 |
| Men's 100 metre butterfly | Semifinal 1 | Kristóf Milák | Hungary | 50.31 | 30 July | OR | 7 |
| Men's 100 metre butterfly | Semifinal 2 | Caeleb Dressel | United States | 49.71 | 30 July | OR | 7 |
| Men's 200 metre backstroke | Final | Evgeny Rylov | ROC | 1:53.27 | 30 July | OR | 7 |
| Men's 100 metre butterfly | Final | Caeleb Dressel | United States | 49.45 | 31 July | WR | 8 |
| Men's 50 metre freestyle | Final | Caeleb Dressel | United States | 21.07 | 1 August | OR | 9 |
| Men's 4 × 100 metre medley relay | Final | Ryan Murphy (52.31)Michael Andrew (58.49)Caeleb Dressel (49.03)Zach Apple (46.95) | United States | 3:26.78 | 1 August | WR | 9 |

### Women

| Event | Round | Swimmer | Team | Time | Date | Record | Day |
| Women's 100 metre freestyle | Final | Sarah Sjöström | Sweden | 52.62 (r) | 25 July | OR | 2 |
| Women's 4 × 100 metre freestyle relay | Final | Bronte Campbell (53.01) Meg Harris (53.09) Emma McKeon (51.35) Cate Campbell (52.24) | Australia | 3:29.69 | 25 July | WR | 2 |
| Women's 100 metre backstroke | Heat 4 | Kylie Masse | Canada | 58.17 | 25 July | OR | 2 |
| Women's 100 metre backstroke | Heat 5 | Regan Smith | United States | 57.96 | 25 July | OR | 2 |
| Women's 100 metre backstroke | Heat 6 | Kaylee McKeown | Australia | 57.88 | 25 July | OR | 2 |
| Women's 100 metre breaststroke | Heat 5 | Tatjana Schoenmaker | South Africa | 1:04.82 | 25 July | OR | 2 |
| Women's 100 metre backstroke | Semifinal 1 | Regan Smith | United States | 57.86 | 26 July | OR | 3 |
| Women's 1500 metre freestyle | Heat 5 | Katie Ledecky | United States | 15:35.35 | 26 July | OR | 3 |
| Women's 100 metre backstroke | Final | Kaylee McKeown | Australia | 57.47 | 27 July | OR | 4 |
| Women's 200 metre freestyle | Final | Ariarne Titmus | Australia | 1:53.50 | 28 July | OR | 5 |
| Women's 100 metre freestyle | Heat 6 | Emma McKeon | Australia | 52.13 | 28 July | OR | 5 |
| Women's 200 metre breaststroke | Heat 4 | Tatjana Schoenmaker | South Africa | 2:19.16 | 28 July | OR | 5 |
| Women's 200 metre butterfly | Final | Zhang Yufei | China | 2:03.86 | 29 July | OR | 6 |
| Women's 4 × 200 metre freestyle relay | Final | Yang Junxuan (1:54.37)Tang Muhan (1:55.00)Zhang Yufei (1:55.66)Li Bingjie (1:55.30) | China | 7:40.33 | 29 July | WR | 6 |
| Women's 200 metre breaststroke | Final | Tatjana Schoenmaker | South Africa | 2:18.95 | 30 July | WR | 7 |
| Women's 100 metre freestyle | Final | Emma McKeon | Australia | 51.96 | 30 July | OR | 7 |
| Women's 50 metre freestyle | Heat 10 | Emma McKeon | Australia | 24.02 | 30 July | OR | 7 |
| Women's 50 metre freestyle | Semifinal 2 | Emma McKeon | Australia | 24.00 | 31 July | OR | 8 |
| Women's 50 metre freestyle | Final | Emma McKeon | Australia | 23.81 | 1 August | OR | 9 |
| Women's 4 × 100 metre medley relay | Final | Kaylee McKeown (58.01)Chelsea Hodges (1:05.57)Emma McKeon (55.91)Cate Campbell (52.11) | Australia | 3:51.60 | 1 August | OR | 9 |

### Mixed

| Event | Round | Swimmer | Team | Time | Date | Record | Day |
| Mixed 4 × 100 metre medley relay | Heat 1 | Kathleen Dawson (58.50)Adam Peaty (57.08)James Guy (50.58)Freya Anderson (52.59) | Great Britain | 3:38.75 | 29 July | OR | 6 |
| Mixed 4 × 100 metre medley relay | Final | Kathleen Dawson (58.80)Adam Peaty (56.78)James Guy (50.00)Anna Hopkin (52.00) | Great Britain | 3:37.58 | 31 July | WR | 8 |
* All world records (WR) are consequently Olympic records (OR).

## Chinese swimming team doping allegation

On 20 April 2024, The New York Times revealed that 23 members of the Chinese swimming team tested positive for a performance-enhancing drug called Trimetazidine seven months prior to the start of the games and were allowed to participate in the games with some of the swimmers winning medals. Following the publication of the report, Travis Tygart, CEO of the United States Anti-Doping Agency, accused the World Anti-Doping Agency (WADA) and the China Anti-Doping Agency (CHINADA) of covering up doping by Chinese swimmers.
In response to Tygart's comments, WADA stated that it “stands by the results of its rigorous scientific investigation” into the case and was “astonished by the outrageous, completely false and defamatory remarks while CHINADA stated that the reports were misleading and that the doping tests they conducted only found that the swimmers had only tested extremely low concentration of Trimetazidine which was due to contamination at the hotel they were residing at that time," although any amount of the substance constitutes a ban.
In a second statement, Tygart accused both WADA and the CHINADA for not being transparent about the findings and keeping "clean athletes in the dark". WADA was alleged to have a double-standard as Russian figure skater Kamila Valieva tested positive for TMZ and used the same excuse, but was banned for four years following a two-year long investigation. However, WADA argued that contamination was not possible in Valieva's case based on the pharmacokinetic data. In contrast, according to WADA, in the case of the Chinese swimmers, several factors pointed towards contamination rather than deliberate doping. These include the lack of international competition at the time, only athletes from one hotel testing positive, inconsistencies in test results for the same athletes over short periods (some testing negative, then positive, then negative again), and the very low levels of the substance detected.
On 25 April 2024, WADA announced that Eric Cottier, a Swiss attorney, would launch an independent investigation into the matter, which also drew criticism since he was hand-picked by WADA. In May 2024, WADA announced that it hold an extraordinary meeting to discuss the doping case of the Chinese swimmers. On 9 July 2024, Cottier published his report concluding that WADA had showed no bias towards China. He found the decision not to appeal was "reasonable, both from the point of view of the facts and the applicable rules". WADA President Witold Bańka welcomed the report, stating that it confirmed WADA's actions were fair and justified, highlighting the importance of clarifying these issues before the Paris 2024 Olympics.