World record progression 400 metres individual medley

Main article: List of world records in swimming

The first world record in the 400 metres individual medley in long course (50 metres) swimming was recognized by the International Swimming Federation (FINA) in 1957, followed by the women a year later. In the short course (25 metres) swimming events the world's governing body recognizes world records since March 3, 1991.

Men

Long course

# Time Name Nationality Date Meet Location Ref
1 5:15.6 Gary Heinrich  United States 27 August 1957 - Philadelphia, United States
2 5:12.9 Vladimir Strushanov  Soviet Union 20 October 1957 - Moscow, Soviet Union
3 5:08.8 Ian Black  Great Britain 6 June 1959 - Cardiff, United Kingdom
4 5:07.8 George Harrison  United States 24 June 1960 - Los Angeles, United States
5 5:05.3 George Harrison  United States 24 June 1960 - Los Angeles, United States
6 5:04.5 Dennis Rounsaville  United States 22 July 1960 - Toledo, United States
7 5:04.3 Ted Stickles  United States 1 July 1961 - Chicago, United States
8 4:55.6 Ted Stickles  United States 18 August 1961 - Los Angeles, United States
9 4:53.8 Gerhard Hetz  West Germany 24 May 1962 - Moscow, Soviet Union
10 4:51.4 Ted Stickles  United States 30 June 1962 - Chicago, United States
11 4:51.0 Ted Stickles  United States 12 July 1962 - Louisville, United States
12 4:50.2 Gerhard Hetz  West Germany 12 October 1963 - Tokyo, Japan
13 4:48.6 Dick Roth  United States 31 July 1964 - Los Altos, United States
14 4:45.4 Dick Roth  United States 14 October 1964 Olympic Games Tokyo, Japan
15 4:45.3 Andrey Dunayev  Soviet Union 3 April 1968 - Tallinn, Soviet Union
16 4:45.1 Greg Buckingham  United States 6 July 1968 Santa Clara Invitational Santa Clara, United States
17 4:43.4 Gary Hall Sr.  United States 20 July 1968 - Los Angeles, United States
18 4:43.3 h Charlie Hickcox  United States 30 August 1968 US Olympic Trials Long Beach, United States
19 4:39.0 Charlie Hickcox  United States 30 August 1968 US Olympic Trials Long Beach, United States
20 4:38.7 Gary Hall Sr.  United States 11 July 1969 Santa Clara Invitational Santa Clara, United States
21 4:33.9 Gary Hall Sr.  United States 15 August 1969 AAU Nationals Louisville, United States
22 4:31.0 Gary Hall Sr.  United States 21 August 1970 AAU Nationals Los Angeles, United States
23 4:30.81 Gary Hall Sr.  United States 3 August 1972 US Olympic Trials Chicago, United States
24 4:28.89 András Hargitay  Hungary 20 August 1974 European Championships Vienna, Austria
25 4:26.00 Zoltán Verrasztó  Hungary 2 April 1976 AAU Indoor Championships Long Beach, United States
26 4:23.68 Rod Strachan  United States 25 July 1976 Olympic Games Montreal, Canada
27 4:23.39 Jesse Vassallo  United States 4 August 1978 AAU Championships The Woodlands, United States
28 4:20.05 Jesse Vassallo  United States 28 August 1978 World Championships West Berlin, West Germany
29 4:19.78 Ricardo Prado  Brazil 8 August 1982 World Championships Guayaquil, Ecuador
30 4:19.61 Jens-Peter Berndt  East Germany 23 May 1984 East German Championships Magdeburg, East Germany
31 4:17.53 Alex Baumann  Canada 17 June 1984 Canadian Olympic Trials Etobicoke, Canada
32 4:17.41 Alex Baumann  Canada 30 July 1984 Olympic Games Los Angeles, United States
33 4:16.12 David Wharton  United States 14 August 1987 Pan Pacific Championships Brisbane, Australia
34 4:15.42 Tamás Darnyi  Hungary 19 August 1987 European Championships Strasbourg, France
35 4:14.75 Tamás Darnyi  Hungary 21 September 1988 Olympic Games Seoul, South Korea
36 4:12.36 Tamás Darnyi  Hungary 8 January 1991 World Championships Perth, Australia
37 4:12.30 Tom Dolan  United States 11 September 1994 World Championships Rome, Italy
38 4:11.76 Tom Dolan  United States 17 September 2000 Olympic Games Sydney, Australia [1]
39 4:11.09 Michael Phelps  United States 15 August 2002 US National Championships Fort Lauderdale, United States [2]
40 4:10.73 Michael Phelps  United States 7 April 2003 Duel in the Pool Indianapolis, United States [3]
41 4:09.09 Michael Phelps  United States 27 July 2003 World Championships Barcelona, Spain [4]
42 4:08.41 Michael Phelps  United States 7 July 2004 US Olympic Trials Long Beach, United States [5]
43 4:08.26 Michael Phelps  United States 14 August 2004 Olympic Games Athens, Greece [6]
44 4:06.22 Michael Phelps  United States 1 April 2007 World Championships Melbourne, Australia [7]
45 4:05.25 Michael Phelps  United States 29 June 2008 US Olympic Trials Omaha, United States [8]
46 4:03.84 Michael Phelps  United States 10 August 2008 Olympic Games Beijing, China [9]
47 4:02.50 Léon Marchand  France 23 July 2023 World Championships Fukuoka, Japan [10][11]

Short course

# Time Name Nationality Date Meet Location Ref
1 4:08.77 Luca Sacchi  Italy 29 February 1992 World Cup Palma de Mallorca, Spain
2 4:07.10 Jani Sievinen  Finland 9 February 1993 World Cup Malmö, Sweden
3 4:06.03 Jani Sievinen  Finland 20 January 1996 - Lappeenranta, Finland
4 4:05.59 Marcel Wouda  Netherlands 1 February 1997 World Cup Gelsenkirchen, Germany
5 4:05.41 Marcel Wouda  Netherlands 8 February 1997 World Cup Paris, France
6 4:04.24 Matthew Dunn  Australia 24 September 1998 Australian Championships Perth, Australia
7 4:02.72 Brian Johns  Canada 23 February 2003 Canadian University Championships Victoria, Canada
8 4:00.37 László Cseh  Hungary 9 December 2005 European Championships Trieste, Italy
9 3:59.33 László Cseh  Hungary 14 December 2007 European Championships Debrecen, Hungary
10 3:57.27 László Cseh  Hungary 11 December 2009 European Championships Istanbul, Turkey [12]
11 3:55.50 Ryan Lochte  United States 16 December 2010 World Championships Dubai, United Arab Emirates [13]
12 3:54.81 Daiya Seto  Japan 20 December 2019 International Swimming League Las Vegas, United States [14]

Women

Long course

# Time Name Nationality Date Meet Location Ref
1 5:46.6 Sylvia Ruuska  United States 27 June 1958 - Los Angeles, United States
2 5:43.7 Sylvia Ruuska  United States 1 August 1958 - Topeka, United States
3 5:41.1 Sylvia Ruuska  United States 24 February 1959 - Melbourne, Australia
4 5:40.2 Sylvia Ruuska  United States 17 July 1959 - Redding, United States
5 5:36.5 Donna de Varona  United States 15 July 1960 - Indianapolis, United States
6 5:34.5 Donna de Varona  United States 11 August 1961 - Philadelphia, United States
7 5:29.7 Donna de Varona  United States 2 June 1962 - Los Altos, United States
8 5:27.4 Sharon Finneran  United States 26 July 1962 - Osaka, Japan
9 5:24.7 Donna de Varona  United States 26 July 1962 - Osaka, Japan
10 5:21.9 Sharon Finneran  United States 28 July 1962 - Osaka, Japan
11 5:16.5 Donna de Varona  United States 10 March 1964 - Lima, Peru
12 5:14.9 Donna de Varona  United States 30 August 1964 - New York City, United States
13 5:11.7 Claudia Kolb  United States 9 July 1967 Santa Clara International Santa Clara, United States
14 5:09.7 Claudia Kolb  United States 1 August 1967 Pan American Games Winnipeg, Canada
15 5:08.2 Claudia Kolb  United States 19 August 1967 AAU Nationals Philadelphia, United States
16 5:04.7 Claudia Kolb  United States 24 August 1968 US Olympic Trials Los Angeles, United States
17 5:02.97 Gail Neall  Australia 31 August 1972 Olympic Games Munich, West Germany
18 5:01.10 Angela Franke  East Germany 18 August 1973 - Utrecht, Netherlands
19 4:57.51 Gudrun Wegner  East Germany 6 September 1973 World Championships Belgrade, Socialist Federal Republic of Yugoslavia
20 4:52.42 Ulrike Tauber  East Germany 21 August 1974 European Championships Vienna, Austria
21 4:52.20 Ulrike Tauber  East Germany 7 June 1975 East German Championships Wittenberg, East Germany
22 4:48.79 Birgit Treiber  East Germany 1 June 1976 East German Championships East Berlin, East Germany
23 4:42.77 Ulrike Tauber  East Germany 24 July 1976 Olympic Games Montreal, Canada
24 4:40.83 Tracy Caulkins  United States 23 August 1978 World Championships West Berlin, West Germany
25 4:39.96 Petra Schneider  East Germany 30 March 1980 - Leningrad, Soviet Union
26 4:38.44 Petra Schneider  East Germany 27 May 1980 - Magdeburg, East Germany
27 4:36.29 Petra Schneider  East Germany 26 July 1980 Olympic Games Moscow, Soviet Union
28 4:36.10 Petra Schneider  East Germany 26 July 1982 World Championships Guayaquil, Ecuador
29 4:34.79 Chen Yan  China 13 October 1997 Chinese National Games Shanghai, China
30 4:33.59 Yana Klochkova  Ukraine 16 September 2000 Olympic Games Sydney, Australia [15]
31 4:32.89 Katie Hoff  United States 1 April 2007 World Championships Melbourne, Australia [16]
32 4:31.46 Stephanie Rice  Australia 22 March 2008 Australian Championships Sydney, Australia [17]
33 4:31.12 Katie Hoff  United States 29 June 2008 US Olympic Trials Omaha, United States [18]
34 4:29.45 Stephanie Rice  Australia 10 August 2008 Olympic Games Beijing, China [19]
35 4:28.43 Ye Shiwen  China 28 July 2012 Olympic Games London, United Kingdom [20]
36 4:26.36 Katinka Hosszú  Hungary 6 August 2016 Olympic Games Rio de Janeiro, Brazil [21]
37 4:25.87 Summer McIntosh  Canada 1 April 2023 Canadian Trials Toronto, Canada [22]
38 4:24.38 Summer McIntosh  Canada 16 May 2024 Canadian Trials Toronto, Canada [23][24]
39 4:23.65 Summer McIntosh  Canada 11 June 2025 Canadian Trials Victoria, Canada [25]

Short course

# Time Name Nationality Date Meet Location Ref
1 4:29.00 Dai Guohong China 2 December 1993 World Championships Palma de Mallorca, Spain
2 4:27.83 Yana Klochkova Ukraine 20 January 2002 World Cup Paris, France
3 4:26.52 Kirsty Coventry Zimbabwe 9 April 2008 World Championships Manchester, United Kingdom [26]
4 4:25.87 Julia Smit USA 28 November 2008 Canada Cup Toronto, Canada
5 4:25.06 Mireia Belmonte Spain 14 December 2008 European Championships Rijeka, Croatia [27]
6 4:22.88 Kathryn Meaklim South Africa 22 November 2009 World Cup Singapore [28]
7 4:21.04 Julia Smit USA 18 December 2009 Duel in the Pool Manchester, United Kingdom [29]
8 4:20.85 Katinka Hosszú  Hungary 11 August 2013 World Cup Berlin, Germany [30]
9 4:20.83 Katinka Hosszú  Hungary 28 August 2014 World Cup Doha, Qatar [31]
10 4:19.86 Mireia Belmonte Spain 3 December 2014 World Championships Doha, Qatar [32]
11 4:19.46 h Katinka Hosszú Hungary 2 December 2015 European Championships Netanya, Israel [33]
12 4:18.94 Mireia Belmonte Spain 12 August 2017 World Cup Eindhoven, Netherlands [34]
13 4:15.48 Summer McIntosh Canada 14 December 2024 World Championships Budapest, Hungary [35][36]
Legend: # – Record awaiting ratification by FINA;
Records not set in finals: h – heat; sf – semifinal; r – relay 1st leg; rh – relay heat 1st leg; b – B final; † – en route to final mark; tt – time trial

All-time top 25

Tables show data for two definitions of "Top 25" - the top 25 400 m individual medley times and the top 25 athletes:
- denotes top performance for athletes in the top 25 400 m individual medley times
- denotes lesser performances, still in the top 25 400 m individual medley times, by repeat athletes
- denotes top performance (only) for other top 25 athletes who fall outside the top 25 400 m individual medley times

Men long course

  • Correct as of December 2025[37]
Ath.# Perf.# Time Athlete Nation Date Place Ref.
1 1 4:02.50 Léon Marchand  France 25 July 2023 Fukuoka [10]
2 4:02.95 Marchand #2 28 July 2024 Paris [38]
2 3 4:03.84 Michael Phelps  United States 10 August 2008 Beijing [9]
4 4:04.28 Marchand #3 18 June 2022 Budapest [39]
5 4:04.73 Marchand #4 3 August 2025 Singapore [40]
3 6 4:05.18 Ryan Lochte  United States 28 July 2012 London [41]
7 4:05.25 Phelps #2 18 June 2008 Omaha [8]
4 8 4:05.90 Chase Kalisz  United States 30 July 2017 Budapest [42]
5 9 4:06.05 Kosuke Hagino  Japan 6 August 2016 Rio de Janeiro [43]
10 4:06.08 Lochte #2 18 June 2008 Omaha [8]
6 11 4:06.09 Daiya Seto  Japan 25 January 2020 Tokyo [44]
7 12 4:06.16 László Cseh  Hungary 10 August 2008 Beijing [9]
13 4:06.22 Phelps #3 1 April 2007 Melbourne [7]
14 4:06.40 Lochte #3 7 July 2009 Indianapolis [45]
8 15 4:06.56 Carson Foster  United States 18 June 2022 Budapest [39]
25 July 2023 Fukuoka [10]
17 4:06.75 Kalisz #2 6 August 2016 Rio de Janeiro [43]
9 18 4:06.96 Tyler Clary  United States 7 July 2009 Indianapolis [45]
19 4:06.99 Kalisz #3 29 June 2017 Indianapolis [46]
20 4:07.01 Lochte #4 2 August 2009 Rome [47]
21 4:07.02 Foster #3 5 December 2025 Austin [48]
22 4:07.06 Lochte #5 25 June 2012 Omaha [49]
23 4:07.11 Marchand #5 16 May 2025 Austin [50]
24 4:07.13 Lochte #6 31 July 2011 Shanghai [51]
10 25 4:07.21 Tomoyuki Matsushita  Japan 4 September 2025 Tokyo [52]
11 4:07.46 Bobby Finke  United States 5 June 2025 Indianapolis [53]
12 4:07.47 Dávid Verrasztó  Hungary 24 June 2017 Rome [54]
13 4:07.67 Asaki Nishikawa  Japan 29 November 2025 Tokyo [55]
14 4:08.05 Ilya Borodin  Russia 25 July 2022 Kazan [56]
15 4:08.70 Lewis Clareburt  New Zealand 30 July 2022 Birmingham [57]
16 4:08.85 Max Litchfield  Great Britain 28 July 2024 Paris [38]
17 4:08.86 Thiago Pereira  Brazil 2 August 2009 Rome [47]
28 July 2012 London [41]
18 4:09.10 Wang Shun  China 4 September 2013 Shenyang [58]
19 4:09.18 Duncan Scott  Great Britain 7 April 2022 Sheffield [59]
20 4:09.22 Jay Litherland  United States 28 July 2019 Gwangju [60]
21 4:09.27 Brendon Smith  Australia 28 July 2021 Tokyo [61]
22 4:09.29 Alberto Razzetti  Italy 30 November 2023 Riccione [62]
23 4:09.38 Yumeki Kojima  Japan 19 July 2025 Suzuka [63]
24 4:09.65 Rex Maurer  United States 5 June 2025 Indianapolis [53]
25 4:09.79 Kosuke Makino  Japan 23 March 2025 Tokyo [64]

Men short course

  • Correct as of October 2025[65]
Ath.# Perf.# Time Athlete Nation Date Place Ref.
1 1 3:54.81 Daiya Seto  Japan 20 December 2019 Las Vegas [14]
2 2 3:55.50 Ryan Lochte  United States 16 December 2010 Dubai [13]
3 3:55.53 Seto #2 26 October 2019 Tokyo [66]
4 3:55.75 Seto #3 17 December 2022 Melbourne [67]
3 5 3:56.13 Shaine Casas  United States 25 October 2025 Toronto [68]
6 3:56.26 Seto #4 20 December 2021 Abu Dhabi [69]
7 3:56.33 Seto #5 4 December 2014 Doha [70]
8 3:56.43 Seto #6 15 December 2018 Hangzhou [71]
4 9 3:56.47 Ilya Borodin  Russia 20 December 2021 Abu Dhabi [69]
5 10 3:56.48 Kosuke Hagino  Japan 13 January 2014 Tokyo [72]
11 3:56.83 Borodin #2 14 December 2024 Budapest [73]
6 12 3:57.01 Alberto Razzetti  Italy 10 December 2023 Otopeni [74]
13 3:57.25 Seto #7 30 September 2018 Eindhoven [75]
7 14 3:57.27 László Cseh  Hungary 11 December 2009 Istanbul [12]
8 15 3:57.40 Oussama Mellouli  Tunisia 16 December 2010 Dubai [13]
16 3:57.41 Casas #2 19 October 2025 Westmont [76]
9 17 3:57.45 Carson Foster  United States 14 December 2024 Budapest [73]
10 18 3:57.56 Tyler Clary  United States 16 December 2010 Dubai [13]
19 3:57.63 Foster #2 17 December 2022 Melbourne [67]
20 3:57.66 Seto #8 15 November 2017 Tokyo [77]
21 3:57.67 Borodin #3 25 November 2024 Saint Petersburg [78]
22 3:57.85 Seto #9 30 October 2021 Kazan [79]
11 23 3:57.91 Thomas Fraser-Holmes  Australia 28 November 2015 Sydney [80]
24 3:57.99 Foster #3 20 December 2021 Abu Dhabi [69]
25 3:58.08 Borodin #4 24 November 2022 Kazan [81]
12 3:58.30 Léon Marchand  France 26 October 2024 Incheon [82]
13 3:59.21 Matthew Sates  South Africa 17 December 2022 Melbourne [67]
14 3:59.23 Chad le Clos  South Africa 9 November 2013 Tokyo [83]
15 3:59.33 Brendon Smith  Australia 30 September 2021 Naples [84]
16 3:59.47 Péter Bernek  Hungary 14 December 2017 Copenhagen [85]
17 3:59.81 Duncan Scott  Great Britain 20 December 2019 Las Vegas [14]
18 3:59.90 Conor Dwyer  United States 10 August 2013 Berlin [86]
19 3:59.99 Wang Shun  China 17 November 2018 Singapore [87]
20 4:00.10 Dávid Verrasztó  Hungary 11 December 2009 Istanbul [12]
21 4:00.18 Max Litchfield  Great Britain 16 December 2018 Sheffield [88]
22 4:00.43 Kaito Tabuchi  Japan 14 December 2024 Budapest [73]
23 4:00.44 Tomoyuki Matsushita  Japan 19 October 2024 Tokyo [89]
24 4:00.55 Gal Nevo  Israel 11 December 2009 Istanbul [12]
25 4:00.57 Tristan Jankovics  Canada 14 December 2024 Budapest [73]

Women long course

  • Correct as of January 2026[90]
Ath.# Perf.# Time Athlete Nation Date Place Ref.
1 1 4:23.65 Summer McIntosh  Canada 11 June 2025 Victoria [25]
2 4:24.38 McIntosh #2 16 May 2024 Toronto [23]
3 4:25.78 McIntosh #3 3 August 2025 Singapore [91]
4 4:25.87 McIntosh #4 1 April 2023 Toronto [22]
2 5 4:26.36 Katinka Hosszú  Hungary 6 August 2016 Rio de Janeiro [21]
6 4:26.98 McIntosh #5 7 March 2025 Westmont [92]
7 4:27.11 McIntosh #6 30 July 2023 Fukuoka [93]
8 4:27.71 McIntosh #7 29 July 2024 Paris [94]
9 4:28.13 McIntosh #8 16 January 2026 Austin [95]
3 10 4:28.22 Kaylee McKeown  Australia 18 April 2024 Gold Coast [96]
4 11 4:28.43 Ye Shiwen  China 28 July 2012 London [20]
12 4:28.58 Hosszú #2 6 August 2016 Rio de Janeiro [97]
13 4:28.61 McIntosh #9 2 December 2022 Greensboro [98]
14 4:29.01 McIntosh #10 29 July 2022 Birmingham [99]
15 4:29.12 McIntosh #11 4 March 2022 Toronto [100]
16 4:29.33 Hosszú #3 30 July 2017 Budapest [101]
5 17 4:29.45 Stephanie Rice  Australia 10 August 2008 Beijing [19]
6 18 4:29.89 Kirsty Coventry  Zimbabwe 10 August 2008 Beijing [19]
18 4:29.89 Hosszú #4 4 March 2016 Marseille [102]
20 4:29.96 McIntosh #12 1 December 2023 Greensboro [103]
21 4:30.31 Hosszú #5 2 August 2009 Rome [104]
22 4:30.39 Hosszú #6 9 August 2015 Kazan [105]
Hosszú #7 28 July 2019 Gwangju [106]
24 4:30.41 Hosszú #8 4 August 2013 Barcelona [107]
7 25 4:30.43 Li Xuanxu  China 17 October 2009 Jinan [108]
8 4:30.82 Yui Ohashi  Japan 8 April 2018 Tokyo [109]
9 4:30.85 Qi Hui  China 17 October 2009 Jinan
10 4:31.12 Katie Hoff  United States 29 June 2008 Omaha [18]
11 4:31.15 Maya Dirado  United States 6 August 2016 Rio de Janeiro [21]
12 4:31.21 Mireia Belmonte  Spain 4 August 2013 Barcelona [107]
13 4:31.27 Elizabeth Beisel  United States 28 July 2012 London [20]
14 4:31.33 Hannah Miley  Great Britain 20 March 2009 Sheffield [110]
15 4:31.41 Katie Grimes  United States 30 July 2023 Fukuoka [93]
16 4:32.30 Jenna Forrester  Australia 30 July 2023 Fukuoka [93]
17 4:32.52 Emily Overholt  Canada 9 August 2015 Kazan [105]
18 4:32.53 Melanie Margalis  United States 6 March 2020 Des Moines [111]
19 4:32.76 Emma Weyant  United States 25 July 2021 Tokyo [112]
20 4:32.88 Sydney Pickrem  Canada 30 July 2017 Budapest [101]
21 4:33.01 Aimee Willmott  Great Britain 24 July 2014 Glasgow [113]
22 4:33.26 Mio Narita  Japan 3 August 2025 Singapore [91]
23 4:33.50 Zhou Min  China 4 September 2013 Shenyang [58]
24 4:33.59 Yana Klochkova  Ukraine 16 September 2000 Sydney [15]
25 4:33.76 Yu Zidi  China 3 August 2025 Singapore [91]

Women short course

  • Correct as of October 2025[114]
Ath.# Perf.# Time Athlete Nation Date Place Ref.
1 1 4:15.48 Summer McIntosh  Canada 14 December 2024 Budapest [35]
2 2 4:18.94 Mireia Belmonte  Spain 12 August 2017 Eindhoven [34]
3 3 4:19.46 Katinka Hosszú  Hungary 2 December 2015 Netanya [33]
4 4:19.75 Hosszú #2 2 December 2015 Netanya [115]
5 4:19.82 Hosszú #3 6 August 2017 Berlin [116]
6 4:19.86 Belmonte #2 3 December 2014 Doha [32]
4 7 4:20.14 Katie Grimes  United States 14 December 2024 Budapest [35]
8 4:20.83 Hosszú #4 28 August 2014 Doha [31]
9 4:20.85 Hosszú #5 11 August 2013 Berlin [30]
5 10 4:21.04 Julia Smit  United States 18 December 2009 Manchester [29]
11 4:21.05 Hosszú #6 3 December 2014 Doha [117]
12 4:21.21 Hosszú #7 11 December 2015 Indianapolis [118]
13 4:21.23 Belmonte #3 15 December 2013 Herning [119]
14 4:21.40 Hosszú #8 11 December 2018 Hangzhou [120]
15 4:21.49 McIntosh #2 29 October 2022 Toronto [121]
16 4:21.67 Hosszú #9 6 December 2016 Windsor [122]
17 4:21.91 Hosszú #10 10 November 2018 Tokyo [123]
18 4:22.05 Hosszú #11 14 November 2017 Tokyo [124]
19 4:22.06 Hosszú #12 1 September 2014 Dubai [125]
20 4:22.18 Hosszú #13 8 August 2013 Eindhoven [126]
21 4:22.55 Belmonte #4 6 August 2017 Berlin [116]
22 4:22.68 Belmonte #5 2 November 2014 Singapore [127]
6 23 4:22.73 Yui Ohashi  Japan 10 November 2018 Tokyo [123]
7 24 4:22.88 Kathryn Meaklim  South Africa 22 November 2009 Singapore [28]
25 4:22.94 Hosszú #14 3 December 2014 Doha [32]
8 4:22.97 Ellen Walshe  Ireland 24 October 2025 Toronto [128]
9 4:23.14 Hannah Miley  Great Britain 12 December 2012 Istanbul [129]
10 4:23.33 Ye Shiwen  China 12 December 2012 Istanbul [129]
11 4:23.68 Sydney Pickrem  Canada 15 November 2020 Budapest [130]
12 4:24.15 Melanie Margalis  United States 20 December 2019 Las Vegas [131]
13 4:24.25 Mary-Sophie Harvey  Canada 24 October 2025 Toronto [128]
14 4:24.31 Dagny Knutson  United States 18 December 2009 Manchester [29]
15 4:24.34 Abbie Wood  Great Britain 14 December 2024 Budapest [35]
16 4:24.62 Caitlin Leverenz  United States 16 December 2011 Atlanta [132]
17 4:25.37 Aimee Willmott  Great Britain 15 December 2013 Herning [119]
18 4:25.50 Hali Flickinger  United States 22 November 2020 Budapest [133]
19 4:25.55 Tessa Cieplucha  Canada 16 December 2021 Abu Dhabi [134]
20 4:25.56 Elizabeth Beisel  United States 3 December 2014 Doha [32]
21 4:25.61 Zsuzsanna Jakabos  Hungary 25 November 2012 Chartres [135]
22 4:26.06 Alessia Filippi  Italy 14 December 2008 Rijeka [27]
Ella Eastin  United States 12 August 2017 Eindhoven [34]
24 4:26.31 Bailey Andison  Canada 5 September 2021 Naples [136]
25 4:26.41 Fantine Lesaffre  France 23 November 2019 London [137]

References

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  6. ^ Stephen Thomas (14 August 2004). "New World Record as Michael "the Machine" Lowers 'his' 400 IM Yet Again! Vendt takes Silver, as USA Goes 1-2". Swimming World. Retrieved 20 September 2025.
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  11. ^ "NEW WORLD RECORD Leon Marchand Men 400m Medley". youtube.com. World Aquatics. 24 July 2023. Retrieved 9 May 2025.
  12. ^ a b c d "2009 European Championships - Men's 400m IM Final Results" (PDF). Omega Timing. 16 December 2010. Retrieved 24 April 2025.
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  14. ^ a b c "2019 International Swimming League (Final) - Men's 400m Individual Medley Results" (PDF). 20 December 2019. p. 6. Retrieved 20 December 2019.
  15. ^ a b "2000 Olympic Games - Women's 400m IM Final Results" (PDF). Omega Timing. 29 September 2000. Retrieved 11 March 2024.
  16. ^ "12th FINA World Championships - Women's 400m IM Final Results" (PDF). Omega Timing. 1 April 2007. Retrieved 11 March 2024.
  17. ^ "Rice and Seebohm smash world records". The Sydney Morning Herald. 22 March 2008. Retrieved 7 March 2025.
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  21. ^ a b c Forde, Pat (6 August 2016). "'Iron Lady' Katinka Hosszu shatters world record in 400 IM, American Maya DiRado takes second". Yahoo!. Retrieved 7 August 2016.
  22. ^ a b "2023 Canadian Trials - Women's 400m IM Final Results". swimming.ca. 1 April 2023. Retrieved 1 April 2023.
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