2009 in swimming documents the highlights of competitive international swimming during 2009.

Major events World 5–11 July: Swimming at the 2009 Summer Universiade in Belgrade, Serbia 19–25 July: Open water swimming at the 2009 World Aquatics Championships in Rome, Italy 26 July – 2 August: Swimming at the 2009 World Aquatics Championships in Rome, Italy 2009 FINA Swimming World Cup: 16–17 October: Durban, South Africa 23–25 October: Rio de Janeiro, Brazil (cancelled) 6–7 November: Moscow, Russia 10–11 November: Stockholm, Sweden 14–15 November: Berlin, Germany 21–22 November: Singapore

Regional 27 June – 1 July: Swimming at the 2009 Mediterranean Games in Pescara, Italy 30 June – 5 July: Central American and Caribbean Swimming Championships in Barquisimeto, Venezuela 2–6 July: Swimming at the 2009 Asian Youth Games, Singapore 8–12 July: European Junior Swimming Championships in Prague, Czech Republic 30 October – 9 November: Swimming at the 2009 Asian Indoor Games in Hanoi, Vietnam 10–13 December: European Short Course Swimming Championships in Istanbul, Turkey 10–14 December: Swimming at the 2009 Southeast Asian Games in Vientiane, Laos

Suit ban

147 world records were set during 2009, 42 of those coming at the world championships. This was linked to the Speedo LZR, a suit released in 2008 that covered the shoulders to ankles and featured polyurethane panels, and suits from Jaked and Arena in 2009, which expanded on the LZR's design by covering the entire suits in polyurethane.

The FINA Congress was held in Rome on 24 July 2009, during the world championships, and voted almost unanimously to ban all body-length swimsuits.FINA Opts to Ban All High-Tech Swimsuits , reachforthewall.com, 24 July 2009 Men's swimsuits may maximally cover the area from the waist to the knee, and women's counterparts from the shoulder to the knee. They also ruled that the fabric used must be a "textile", that is, consisting natural or synthetic yarns woven together. With the exception of drawstrings on male jammers, suits must not have any fastening devices such as a zipper. The new regulations took effect on 1 January 2010.FINA REQUIREMENTS FOR SWIMWEAR APPROVAL (FRSA) . (Regulations valid for swimwear to be used from 1 January 2010) as amended with effect from 1 January 2011

World records 147 world records were reported during 2009, however some were unratified by FINA.

Men's long course DateEventTimeNameNationMeetLocationRef50 m butterfly22.43sfRafael MuñozSpanish ChampionshipsMálaga, Spain50 m breaststroke27.06sfCameron van der BurghSouth African ChampionshipsDurban, South Africa100 m freestyle46.94sfAlain BernardFrench ChampionshipsMontpellier, France50 m freestyle20.94Frédérick BousquetFrench ChampionshipsMontpellier, France50 m breaststroke26.89hFelipe França SilvaMaria Lenk TrophyRio de Janeiro, Brazil200 m backstroke1:52.86Ryosuke IrieDuel in the PoolCanberra, Australia100 m breaststroke58.67ttIgor BorysikUkraine National CupKharkiv, Ukraine100 m backstroke52.38rAschwin WildeboerMediterranean GamesPescara, Italy100 m backstroke51.94Aaron PeirsolUS ChampionshipsIndianapolis, United States100 m butterfly50.22Michael PhelpsUS ChampionshipsIndianapolis, United States200 m backstroke1:53.08Aaron PeirsolUS ChampionshipsIndianapolis, United States400 m freestyle3:40.07Paul BiedermannWorld ChampionshipsRome, Italy100 m breaststroke58.58Brenton RickardWorld ChampionshipsRome, Italy200 m freestyle1:42.00Paul BiedermannWorld ChampionshipsRome, Italy50 m breaststroke26.74Cameron van der BurghWorld ChampionshipsRome, Italy200 m butterfly1:51.51Michael PhelpsWorld ChampionshipsRome, Italy50 m breaststroke26.67Cameron van der BurghWorld ChampionshipsRome, Italy800 m freestyle7:32.12Zhang LinWorld ChampionshipsRome, Italy200 m individual medley1:54.10Ryan LochteWorld ChampionshipsRome, Italy100 m freestyle46.91César Cielo FilhoWorld ChampionshipsRome, Italy200 m breaststroke2:07.31sfChristian SprengerWorld ChampionshipsRome, Italy200 m backstroke1:51.92Aaron PeirsolWorld ChampionshipsRome, Italy100 m butterfly50.01sfMilorad ČavićWorld ChampionshipsRome, Italy4 × 200 m freestyle relay6:58.55Michael Phelps (1:44.49)Ricky Berens (1:44.13)David Walters (1:45.47)Ryan Lochte (1:44.46)World ChampionshipsRome, Italy100 m butterfly49.82Michael PhelpsWorld ChampionshipsRome, Italy50 m backstroke24.08sfLiam TancockWorld ChampionshipsRome, Italy50 m backstroke24.04Liam TancockWorld ChampionshipsRome, Italy4 × 100 m medley relay3:27.28Aaron Peirsol (52.19)Eric Shanteau (58.57)Michael Phelps (49.72)David Walters (46.80)World ChampionshipsRome, Italy50 m freestyle20.91César Cielo FilhoBrazilian ChampionshipsSão Paulo, Brazil

Women's long course DateEventTimeNameNationMeetLocationRef200 m freestyle1:54.47Federica PellegriniItalian ChampionshipsRiccione, Italy400 m freestyle4:00.66Joanne JacksonBritish ChampionshipsSheffield, United Kingdom50 m backstroke27.67=Zhao JingChinese ChampionshipsShaoxing, China50 m butterfly25.33Marleen VeldhuisAmsterdam Swim CupAmsterdam, Netherlands50 m freestyle23.96Marleen VeldhuisAmsterdam Swim CupAmsterdam, Netherlands50 m backstroke27.48hAnastasia ZuyevaRussian ChampionshipsMoscow, Russia50 m breaststroke30.23sfYuliya YefimovaRussian ChampionshipsMoscow, Russia50 m breaststroke30.05Yuliya YefimovaRussian ChampionshipsMoscow, Russia50 m backstroke27.47Anastasia ZuyevaRussian ChampionshipsMoscow, Russia100 m freestyle52.85hBritta SteffenGerman ChampionshipsBerlin, Germany50 m backstroke27.61Daniela SamulskiGerman ChampionshipsBerlin, Germany100 m freestyle52.56Britta SteffenGerman ChampionshipsBerlin, Germany400 m freestyle4:00.41Federica PellegriniMediterranean GamesPescara, Italy50 m breaststroke30.23Amanda ReasonCanada World Championship TrialsMontreal, Canada100 m butterfly56.44sfSarah SjöströmWorld ChampionshipsRome, Italy200 m individual medley2:07.03sfAriana KukorsWorld ChampionshipsRome, Italy400 m freestyle3:59.15Federica PellegriniWorld ChampionshipsRome, Italy100 m freestyle52.22rBritta SteffenWorld ChampionshipsRome, Italy4 × 100 m freestyle relay3:31.72Inge Dekker (53.61)Ranomi Kromowidjojo (52.30)Femke Heemskerk (53.03)Marleen Veldhuis (52.78)World ChampionshipsRome, Italy100 m butterfly56.06Sarah SjöströmWorld ChampionshipsRome, Italy100 m breaststroke1:04.84sfRebecca SoniWorld ChampionshipsRome, Italy100 m backstroke58.48sfAnastasia ZuyevaWorld ChampionshipsRome, Italy200 m individual medley2:06.15Ariana KukorsWorld ChampionshipsRome, Italy100 m backstroke58.12Gemma SpofforthWorld ChampionshipsRome, Italy200 m freestyle1:53.67sfFederica PellegriniWorld ChampionshipsRome, Italy200 m butterfly2:04.14 hMary DeScenzaWorld ChampionshipsRome, Italy50 m backstroke27.39sfDaniela SamulskiWorld ChampionshipsRome, Italy50 m backstroke27.38sfAnastasia ZuyevaWorld ChampionshipsRome, Italy200 m freestyle1:52.98Federica PellegriniWorld ChampionshipsRome, Italy200 m breaststroke2:20.12sfAnnamay PierseWorld ChampionshipsRome, Italy200 m butterfly2:03.41Jessicah SchipperWorld ChampionshipsRome, Italy50 m backstroke27.06Zhao JingWorld ChampionshipsRome, Italy4 × 200 m freestyle relay7:42.08 Yang Yu (1:55.47)Zhu Qianwei (1:55.79)Liu Jing (1:56.09)Pang Jiaying (1:54.73)World ChampionshipsRome, Italy100 m freestyle52.07Britta SteffenWorld ChampionshipsRome, Italy50 m butterfly25.28sfMarleen VeldhuisWorld ChampionshipsRome, Italy50 m butterfly25.07sfTherese AlshammarWorld ChampionshipsRome, Italy200 m backstroke2:04.81Kirsty CoventryWorld ChampionshipsRome, Italy4 × 100 m medley relay3:52.19Zhao Jing (58.98)Chen Huijia (1:04.12)Jiao Liuyang (56.28)Li Zhesi (52.81)World ChampionshipsRome, Italy50 m breaststroke30.09Yuliya YefimovaWorld ChampionshipsRome, Italy50 m freestyle23.73Britta SteffenWorld ChampionshipsRome, Italy50 m breaststroke29.95tt, †Jessica HardyUS OpenFederal Way, United States50 m breaststroke29.80†Jessica HardyUS OpenFederal Way, United States100 m breaststroke1:04.45Jessica HardyUS OpenFederal Way, United States200 m butterfly2:01.81Liu ZigeChinese National GamesJinan, China

Men's short course DateEventTimeNameNationMeetLocationRef200 m butterfly1:50.53Nikolay SkvortsovRussian SC ChampionshipsSaint Petersburg, Russia4 × 200 m freestyle relay6:51.05Colin Russell (1:43.60) Stefan Hirniak (1:43.41)Brent Hayden (1:41.49)Joel Greenshields (1:42.55)British SC Grand PrixLeeds, United Kingdom50 m breaststroke25.43Cameron van der BurghSouth Africa SC ChampionshipsPietermaritzburg, South Africa100 m breaststroke56.39sfCameron van der BurghSouth Africa SC ChampionshipsPietermaritzburg, South Africa50 m freestyle20.30hRoland SchoemanSouth Africa SC ChampionshipsPietermaritzburg, South Africa100 m breaststroke55.99Cameron van der BurghSouth Africa SC ChampionshipsPietermaritzburg, South Africa4 × 100 m medley relay3:23.33Jake Tapp (50.60)Paul Kornfeld (57.18)Joe Bartoch (50.18)Brent Hayden (45.37)British SC Grand PrixLeeds, United Kingdom200 m breaststroke2:01.98Christian SprengerAustralian SC ChampionshipsHobart, Australia50 m backstroke22.75Peter MarshallWorld CupDurban, South Africa50 m butterfly22.06Stefan DeiblerInternational Swimming FestivalAachen, Germany100 m butterfly48.99Yevgeny KorotyshkinWorld CupMoscow, Russia200 m backstroke1:47.08George Du RandWorld CupMoscow, Russia200 m butterfly1:49.11Kaio de AlmeidaWorld CupStockholm, Sweden50 m backstroke22.73Peter MarshallWorld CupStockholm, Sweden100 m individual medley50.95hSergey FesikovWorld CupBerlin, Germany50 m breaststroke25.25Cameron van der BurghWorld CupBerlin, Germany400 m freestyle3:32.77Paul BiedermannWorld CupBerlin, Germany50 m butterfly21.80Steffen DeiblerWorld CupBerlin, Germany200 m freestyle1:39.37Paul BiedermannWorld CupBerlin, Germany100 m breaststroke55.61Cameron van der BurghWorld CupBerlin, Germany100 m butterfly48.48Yevgeny KorotyshkinWorld CupBerlin, Germany200 m individual medley1:51.55Darian TownsendWorld CupBerlin, Germany200 m backstroke1:46.11Arkady VyatchaninWorld CupBerlin, Germany50 m backstroke22.61Peter MarshallWorld CupSingapore400 m individual medley3:57.27László CsehEuropean SC ChampionshipsIstanbul, Turkey100 m individual medley50.76sfPeter MankočEuropean SC ChampionshipsIstanbul, Turkey100 m backstroke49.17sfArkady VyatchaninEuropean SC ChampionshipsIstanbul, Turkey200 m breaststroke2:00.67Dániel GyurtaEuropean SC ChampionshipsIstanbul, Turkey100 m backstroke48.97=Stanislav DonetsEuropean SC ChampionshipsIstanbul, Turkey100 m backstroke48.97=Arkady VyatchaninEuropean SC ChampionshipsIstanbul, Turkey100 m backstroke48.94rNick ThomanDuel in the PoolManchester, United Kingdom4 × 100 m medley relay3:20.71Nick Thoman (48.94)Mark Gangloff (57.03)Michael Phelps (49.93)Nathan Adrian (44.81)Duel in the PoolManchester, United Kingdom4 × 100 m freestyle relay3:03.30Nathan Adrian (45.08)Matt Grevers (44.68)Garrett Weber-Gale (47.43)Michael Phelps (46.11)Duel in the PoolManchester, United Kingdom4 × 100 m medley relay3:19.16Stanislav Donets (49.63)Sergey Geybel (56.43)Yevgeny Korotyshkin (48.35)Danila Izotov (44.75)Salnikov CupSaint Petersburg, Russia

Women's short course