The 11th FINA World Swimming Championships (25m) were held in Istanbul, Turkey on 12–16 December 2012. This swimming-only championships took place in the Sinan Erdem Dome; all events were swum in a 25-meter (short-course) pool.

The United States topped the medal standings with a total of 27 medals and had the most gold medals with 11. A total of 18 championship records were set and 2 world records (both set by American Ryan Lochte) broken. Lochte and Hungarian Katinka Hosszú were named the best male and female swimmers of the competition. Lochte finished the meet with 8 total medals (breaking his previous record of 7 set in 2010) and Hosszú had 5 total medals.

Bidding process FINA announced on 12 April 2008 that Istanbul had defeated the only other bidder Vienna, Austria after a meeting of the FINA Bureau in Manchester, UK.

Venue The events took place at the Sinan Erdem Dome, which has a seating capacity of 22,500.

Events The swimming competition featured races in a short-course (25 m) pool in 40 events (20 for males, 20 for females; 17 individual events and 3 relays for each gender). Prelim events were held in the morning session and semi-finals/final in the evening session. Freestyle: 50, 100, 200, 400, 800 (women), and 1500 (men); Backstroke: 50, 100, and 200; Breaststroke: 50, 100, and 200; Butterfly: 50, 100, and 200; Individual medley: 100, 200, and 400; Relays: 4 × 100 free, 4 × 200 free; 4 × 100 medley

Schedule DateMorning session Preliminary heats (10:00 EET)Evening session Semi-finals and finals (19:00 EET) Wednesday 12 December Men's 200 freestyle Women's 50 breaststroke Men's 100 backstroke Women's 200 butterfly Men's 100 breaststroke Women's 100 backstroke Men's 100 butterfly Women's 400 medley Men's 4 × 100 freestyle Women's 4 × 200 freestyle Men's 200 freestyle (final) Women's 50 breaststroke (semi-finals) Men's 100 backstroke (semi-finals) Women's 200 butterfly (final) Men's 100 breaststroke (semi-finals) Women's 100 backstroke (semi-finals) Men's 100 butterfly (semi-finals) Women's 400 medley (final) Men's 4 × 100 freestyle (final) Women's 4 × 200 freestyle (final) Thursday 13 December Women's 100 freestyle Men's 400 medley Women's 50 butterfly Men's 50 freestyle Women's 100 medley Men's 4 × 200 freestyle Women's 800 freestyle (slower heats) Women's 100 freestyle (semi-finals) Men's 400 medley (final) Women's 50 breaststroke (final) Men's 100 backstroke (final) Women's 50 butterfly (semi-finals) Men's 50 freestyle (semi-finals) Women's 100 backstroke (final)Men's 100 breaststroke (final) Women's 100 medley (semi-finals) Men's 100 butterfly (final) Women's 800 freestyle (final) Men's 4 × 200 freestyle (final) Friday 14 December Men's 50 backstroke Women's 200 backstroke Men's 50 butterfly Women's 100 breaststroke Men's 400 freestyle Men's 200 medley Women's 400 freestyle Men's 200 breaststroke Women's 4 × 100 medley Men's 50 backstroke (semi-finals) Women's 100 freestyle (final) Men's 50 butterfly (semi-finals) Women's 200 backstroke (final) Men's 200 breaststroke (final) Women's 50 butterfly (final) Men's 400 freestyle (final) Women's 100 breaststroke (semi-finals) Women's 400 freestyle (final) Men's 50 freestyle (final) Men's 100 medley (final) Men's 200 medley (final) Women's 4 × 100 medley (final) Saturday 15 December Women's 50 backstroke Men's 100 freestyle Women's 100 butterfly Men's 100 medley Women's 50 freestyle Women's 200 medley Men's 50 breaststroke Women's 4 × 100 freestyle Women's 100 breaststroke (final) Men's 50 backstroke (final) Women's 50 backstroke (semi-finals) Men's 100 freestyle(semi-finals) Women's 50 freestyle (semi-finals) Men's 50 butterfly (final) Women's 100 butterfly(semi-finals) Men's 100 medley (semi-finals) Women's 200 medley (final) Men's 50 breaststroke(semi-finals) Women's 4 × 100 freestyle (final) Sunday 16 December Men's 200 backstroke Women's 200 breaststroke Men's 200 butterfly Women's 200 freestyle Men's 4 × 100 medley Men's 1500 freestyle (slower heats) Men's 100 freestyle (final) Women's 50 backstroke (final) Men's 200 backstroke (final) Women's 200 breaststroke (final) Men's 100 medley (final) Women's 100 butterfly (final) Men's 50 breaststroke (final) Women's 50 freestyle (final) Men's 200 butterfly (final) Men's 1500 freestyle (final) Women's 200 freestyle (final) Men's 4 × 100 medley (final)

Medal summary

Changes in medal standings In June 2013, Danish swimmer Mads Glæsner was stripped by FINA of a gold and bronze medal from the 400- and 1500-meter freestyle after testing positive for levomethamphetamine.

In January 2014 the Court of Arbitration for Sport partially overturned FINA's ruling and returned the gold medal in 1500 m freestyle. +List of changes in medal standingsRuling date Event Nation Gold Silver Bronze Total 17 June 2013 Men's 400 metre freestyle −1 −1 +1 +1 17 June 2013 Men's 1500 metre freestyle −1 −1 +1 −1 0 +1 −1 0 +1 +1 31 January 2014 Men's 1500 metre freestyle +1 +1 -1 +1 0 -1 +1 0 -1 -1

Results Men's events   Freestyle50 m freestyle  Vladimir Morozov   Russia 20.55 NRFlorent Manaudou   France 20.88Anthony Ervin   United States 20.99100 m freestyle  Vladimir Morozov   Russia 45.65Tommaso D'Orsogna   Australia 46.80Yevgeny Lagunov   Russia 46.81200 m freestyle  Ryan Lochte   United States 1:41.92Paul Biedermann   Germany 1:42.07Conor Dwyer   United States 1:43.78400 m freestyle   Paul Biedermann   Germany 3:39.15Hao Yun   China 3:39.48Matthew Stanley   New Zealand 3:41.011500 m freestyle   Mads Glæsner   Denmark 14:30.01Gregorio Paltrinieri   Italy 14:31.13Pál Joensen   Faroe Islands 14:36.93   Backstroke50 m backstroke   Robert Hurley   Australia 23.04Matt Grevers   United States 23.17Stanislav Donets   Russia 23.19100 m backstroke   Matt Grevers   United States 49.89Stanislav Donets   Russia 49.91Guilherme Guido   Brazil 50.50200 m backstroke   Radosław Kawęcki   Poland 1:48.48Ryan Lochte   United States 1:48.50Ryan Murphy   United States 1:48.86   Breaststroke50 m breaststroke   Aleksander Hetland   Norway 26.30Damir Dugonjič   Slovenia 26.32Florent Manaudou   France 26.33100 m breaststroke   Fabio Scozzoli   Italy 57.10Damir Dugonjič   Slovenia 57.32Kevin Cordes   United States 57.83200 m breaststroke   Dániel Gyurta   Hungary 2:01.35 CRMichael Jamieson   Great Britain 2:03.00Viatcheslav Sinkevich   Russia 2:03.08   Butterfly50 m butterfly   Nicholas Santos   Brazil 22.22 CRChad le Clos   South Africa 22.26Tom Shields   United States 22.46 NR100 butterfly   Chad le Clos   South Africa 48.82 CR, AFTom Shields   United States 49.54Ryan Lochte   United States 49.59200 m butterfly   Kazuya Kaneda   Japan 1:51.01 CRLászló Cseh   Hungary 1:51.66Nikolay Skvortsov   Russia 1:52.33   Individual medley100 m individual medley   Ryan Lochte   United States 51.21Kenneth To   Australia 51.38George Bovell   Trinidad and Tobago 51.66200 m individual medley   Ryan Lochte   United States 1:49.63 WRDaiya Seto   Japan 1:52.80László Cseh   Hungary 1:52.89400 m individual medley   Daiya Seto   Japan 3:59.15 ASLászló Cseh   Hungary 4:00.50Dávid Verrasztó   Hungary 4:02.87   Relays4 × 100 m freestyle relay   United States Anthony Ervin (47.28) Ryan Lochte (45.64) Jimmy Feigen (47.25) Matt Grevers (46.23)Garrett Weber-GaleTyler Reed 3:06.40 Italy Luca Dotto (46.84) Marco Orsi (45.94) Michele Santucci (47.46) Filippo Magnini (46.83) 3:07.07 Australia Tommaso D'Orsogna (46.68) Kyle Richardson (46.92) Travis Mahoney (47.32) Kenneth To (46.35) 3:07.274 × 200 m freestyle relay   United States Ryan Lochte (1:41.17) Conor Dwyer (1:43.04) Michael Klueh (1:43.04) Matt McLean (1:43.99)Garrett Weber-GaleMichael Weiss 6:51.40 Australia Tommaso D'Orsogna (1:42.49) Jarrod Killey (1:42.82) Kyle Richardson (1:44.59) Robert Hurley (1:42.39)Travis Mahoney 6:52.29 Germany Paul Biedermann (1:41.93) Dimitri Colupaev (1:42.96) Christoph Fildebrandt (1:45.40) Yannick Lebherz (1:42.93) 6:53.224 × 100 m medley relay   United States Matt Grevers (50.00) Kevin Cordes (57.15) Tom Shields (48.66) Ryan Lochte (45.22)Ryan MurphyMihail AlexandrovAnthony Ervin 3:21.03 Russia Stanislav Donets (50.10) Viatcheslav Sinkevich (57.54) Nikolay Skvortsov (50.27) Vladimir Morozov (44.95)Viacheslav PrudnikovYevgeny Lagunov 3:22.86 Australia Robert Hurley (50.44) Kenneth To (57.44) Grant Irvine (50.75) Tommaso D'Orsogna (46.14)Kyle Richardson 3:24.77

Swimmers who participated in the heats only and received medals.

Women's events   Freestyle50 m freestyle  Aleksandra Gerasimenya   Belarus 23.64Francesca Halsall   Great Britain 23.87Jeanette Ottesen   Denmark 24.00100 m freestyle  Britta Steffen   Germany 52.31Megan Romano   United States 52.48Tang Yi   China 52.73200 m freestyle  Allison Schmitt   United States 1:53.59Katinka Hosszú   Hungary 1:54.31Melanie Costa   Spain 1:54.45400 m freestyle   Melanie Costa   Spain 4:01.18Chloe Sutton   United States 4:01.20Lauren Boyle   New Zealand 4:01.24800 m freestyle   Lauren Boyle   New Zealand 8:08.62 OCLotte Friis   Denmark 8:10.99Chloe Sutton   United States 8:15.53   Backstroke50 m backstroke   Zhao Jing   China 25.95 CROlivia Smoliga   United States 26.13 NRAleksandra Urbanczyk   Poland 26.50100 m backstroke   Olivia Smoliga   United States 56.64Mie Nielsen   Denmark 57.07 NRSimona Baumrtová   Czech Republic 57.18 NR200 m backstroke   Daryna Zevina   Ukraine 2:02.24Bonnie Brandon   United States 2:03.19Duane Da Rocha   Spain 2:04.15   Breaststroke50 m breaststroke   Rūta Meilutytė   Lithuania 29.44 CR, ERAlia Atkinson   Jamaica 29.67 NRSarah Katsoulis   Australia 29.94100 m breaststroke   Rūta Meilutytė   Lithuania 1:03.52 CR, ERAlia Atkinson   Jamaica 1:03.80 NRRikke Møller Pedersen   Denmark 1:04.05200 m breaststroke   Rikke Møller Pedersen   Denmark 2:16.08 CRLaura Sogar   United States 2:16.93Kanako Watanabe   Japan 2:19.39   Butterfly50 m butterfly   Lu Ying   China 25.14Jiao Liuyang   China 25.23Jeanette Ottesen   Denmark 25.55100 butterfly   Ilaria Bianchi   Italy 56.13Liu Zige   China 56.58Jemma Lowe   Great Britain 56.66200 m butterfly   Katinka Hosszú   Hungary 2:02.20 CR, ERJiao Liuyang   China 2:02.28Jemma Lowe   Great Britain 2:03.19   Individual medley100 m individual medley   Katinka Hosszú   Hungary 58.49 CRRūta Meilutytė   Lithuania 58.79 NRZhao Jing   China 58.80200 m individual medley   Ye Shiwen   China 2:04.64 CRKatinka Hosszú   Hungary 2:04.72Hannah Miley   Great Britain 2:07.12400 m individual medley   Hannah Miley   Great Britain 4:23.14 CR, ERYe Shiwen   China 4:23.33 ASKatinka Hosszú   Hungary 4:25.95   Relays4 × 100 m freestyle relay   United States Megan Romano (52.86) Jessica Hardy (53.32) Lia Neal (52.44) Allison Schmitt (52.39)Shannon VreelandOlivia Smoliga 3:31.01 Australia Angie Bainbridge (53.04) Marieke Guehrer (52.32) Brianna Throssell (54.19) Sally Foster (53.35) 3:32.90 Denmark Mie Nielsen (53.07) Pernille Blume (53.61) Kelly Rasmussen (54.59) Jeanette Ottesen (52.24) 3:33.514 × 200 m freestyle relay   United States Megan Romano (1:56.03) Chelsea Chenault (1:54.78) Shannon Vreeland (1:55.43) Allison Schmitt (1:53.01)Jasmine Tosky 7:39.25 Russia Veronika Popova (1:55.36) Elena Sokolova (1:55.61) Daria Belyakina (1:55.73) Ksenia Yuskova (1:56.07) 7:42.77 China Qiu Yuhan (1:57.30) Pang Jiaying (1:56.72) Guo Junjun (1:55.91) Tang Yi (1:53.33)Wang Fei 7:43.264 × 100 m medley relay   Denmark Mie Nielsen (56.73) Rikke Møller Pedersen (1:03.48) Jeanette Ottesen (56.49) Pernille Blume (53.17) 3:49.87 Australia Rachel Goh (58.16) Sarah Katsoulis (1:03.89) Marieke Guehrer (56.36) Angie Bainbridge (52.47)Grace LohSamantha Marshall Brianna ThrossellSally Foster 3:50.88 United States Olivia Smoliga (57.25) Jessica Hardy (1:04.61) Claire Donahue (57.67) Megan Romano (51.90)Laura SogarChristine Magnuson Lia Neal 3:51.43

Swimmers who participated in the heats only and received medals.

Championship and world records broken Men