The 100 metres individual medley is an event in competitive swimming. It consists of one 25 m lap of each stroke (butterfly, backstroke, breaststroke, and freestyle), and as such is only recognized in short course (25 m) pools. World records are ratified by World Aquatics (formerly FINA). The current world record holders are the US’ Caeleb Dressel and Gretchen Walsh. The men's and women's events have been contested at the World Aquatics Swimming Championships (25m) since 1999; the current world champions are Switzerland's Noè Ponti, and Walsh.

World record progression

Men

Women

All-time top 25 Tables show data for two definitions of "Top 25" - the top 25 100 m individual medley times and the top 25 athletes:- denotes top performance for athletes in the top 25 100 m individual medley times- denotes lesser performances, still in the top 25 100 m individual medley times, by repeat athletes- denotes top performance (only) for other top 25 athletes who fall outside the top 25 100 m individual medley times

Men Correct as of December 2025 Time Athlete Nation Date Place 1 1 49.28 Caeleb Dressel 22 November 2020 Budapest 2 49.88Dressel #2 16 November 2020 Budapest 2 3 49.92 Léon Marchand 31 October 2024 Singapore 3 4 50.26 Vladimir Morozov 28 September 2018 Eindhoven 9 November 2018 Tokyo 4 6 50.28 Shaine Casas 23 October 2025 Toronto 7 50.30Morozov #3 30 August 2016 Berlin 8 50.31Morozov #4 15 November 2018 Singapore 9 50.32Morozov #5 4 October 2018 Budapest 10 50.33Morozov #6 29 October 2016 Hong Kong 5 10 50.33 Noè Ponti 13 December 2024 Budapest 12 50.36Morozov #7 11 November 2017 Beijing 13 50.39Ponti #2 31 October 2024 Singapore 14 50.43Ponti #3 12 December 2024 Budapest 15 50.45Casas #2 17 October 2025 Westmont 16 50.48Dressel #3 10 November 2020 Budapest 17 50.49Morozov #8 18 November 2017 Singapore 18 50.52Ponti #4 4 December 2025 Lublin 6 19 50.53 Maxime Grousset 4 December 2025 Lublin 20 50.55Morozov #9 25 October 2016 Tokyo 21 50.56Grousset #2 23 October 2025 Taverny 7 21 50.56 Hubert Kós 23 October 2025 Toronto 23 50.60Morozov #10 26 August 2016 Chartres 8 24 50.63 Kliment Kolesnikov 14 December 2018 Hangzhou 25 50.64Ponti #5 13 April 2025 Uster 9 50.66 Markus Deibler 7 December 2014 Doha 10 50.71 Ryan Lochte 15 December 2012 Istanbul 11 50.76 Peter Mankoč 12 December 2009 Istanbul 12 50.95 Sergei Fesikov 14 November 2009 Berlin Marco Orsi 7 November 2021 Kazan 14 50.96 Florent Manaudou 7 December 2013 Dijon 15 50.97 Thomas Ceccon 16 December 2022 Melbourne 16 51.05 Gerhard Zandberg 14 November 2009 Berlin Javier Acevedo 16 December 2022 Melbourne Finlay Knox 23 October 2025 Toronto 19 51.07 Grant House 17 October 2025 Westmont 20 51.11 Bernhard Reitshammer 13 December 2024 Budapest 21 51.14 Marcin Cieślak 16 November 2020 Budapest Emre Sakçı 23 December 2023 Istanbul Duncan Scott 18 October 2024 Shanghai 24 51.15 George Bovell 7 August 2013 Eindhoven 25 51.16 Michael Andrew 15 November 2018 Singapore

Women Correct as of October 2025 Time Athlete Nation Date Place 1 1 55.11 Gretchen Walsh 13 December 2024 Budapest 2 55.71Walsh #2 12 December 2024 Budapest 3 55.77Walsh #3 17 October 2025 Westmont 4 55.91Walsh #4 10 October 2025 Carmel 5 55.98Walsh #5 18 October 2024 Charlottesville 6 55.99Walsh #6 23 October 2025 Toronto 7 56.06Walsh #7 12 December 2024 Budapest 2 8 56.26 Marrit Steenbergen 4 December 2025 Lublin 3 9 56.34 Kate Douglass 10 October 2025 Carmel 10 56.42Douglass #2 17 October 2025 Westmont 11 56.49Douglass #3 13 December 2024 Budapest 4 12 56.51 Katinka Hosszú 7 August 2017 Berlin 13 56.57Douglass #4 31 October 2024 Singapore 14 56.67Hosszú #2 4 December 2015 Netanya 5 14 56.67 Béryl Gastaldello 13 December 2024 Budapest 16 56.70Hosszú #3 5 December 2014 Doha 17 56.75Hosszú #4 14 December 2017 Copenhagen 6 18 56.80 Roos Vanotterdijk 4 December 2025 Lublin 19 56.82Steenbergen #2 1 October 2026 Baku 20 56.84Vanotterdijk #2 1 October 2026 Baku 21 56.86Hosszú #5 1 September 2014 Dubai 22 56.88Douglass #5 12 December 2024 Budapest 23 56.97Hosszú #6 1 October 2017 Hong Kong Hosszú #7 15 December 2017 Copenhagen Douglass #6 24 October 2024 Incheon 7 56.99 Yu Yiting 1 October 2026 Baku 8 57.04 Mary-Sophie Harvey 13 December 2024 Budapest 9 57.10 Sarah Sjöström 2 August 2017 Moscow 10 57.17 Anastasia Gorbenko 4 December 2025 Lublin 11 57.47 Charlotte Bonnet 7 December 2023 Otopeni 12 57.53 Alicia Coutts 10 November 2013 Tokyo Beata Nelson 31 October 2024 Singapore 14 57.59 Siobhan-Marie O'Connor 3 December 2015 Netanya Maria Kameneva 6 December 2019 Glasgow Anastasiya Shkurdai 22 November 2020 Budapest 17 57.68 Rūta Meilutytė 14 December 2013 Herning Louise Hansson 16 December 2022 Melbourne 19 57.69 Rebecca Meder 12 December 2024 Budapest Tessa Giele 13 December 2024 Budapest 21 57.74 Hinkelien Schreuder 15 November 2009 Berlin 22 57.75 Rikako Ikee 15 November 2017 Tokyo 23 57.76 Kaylee McKeown 18 October 2024 Shanghai 24 57.77 Runa Imai 14 December 2018 Hangzhou 25 57.80 Kayla Sanchez 21 December 2018 Lausanne

World champions Men

Edition Winner Time Notes Hong Kong 1999 54.18 CR Athens 2000 52.79 Moscow 2002 52.90 Indianapolis 2004 52.66 CR Shanghai 2006 52.42 CR Manchester 2008 51.15 Dubai 2010 50.86 Istanbul 2012 51.21 Doha 2014 50.66 Windsor 2016 51.84 Hangzhou 2018 50.63 CR Abu Dhabi 2021 Kliment Kolesnikov () 51.09 Melbourne 2022 50.97 Budapest 2024 50.33 CR

Women

Edition Winner Time Notes Hong Kong 1999 1:00.20 Athens 2000 59.71 Moscow 2002 59.91 Indianapolis 2004 1:00.01 Shanghai 2006 1:00.16 Manchester 2008 59.58 Dubai 2010 58.95 Istanbul 2012 58.49 CR Doha 2014 56.70 Windsor 2016 57.24 Hangzhou 2018 57.26 Abu Dhabi 2021 57.80 Melbourne 2022 57.53 Budapest 2024 55.11

Notes

References