| Final 22:53 | time | gap | L | RT | 50m | | 1. Adam Peaty |  GBR | 57.13s | WR | 4 | 0.57 | 26.61s | 1. | | 2. Cameron van der Burgh |  RSA | 58.69s | 1.56 | 3 | 0.64 | 27.24s | 2. | | 3. Cody Miller |  USA | 58.87s | 1.74AM | 5 | 0.67 | 27.48s | 5. | | 4. Kevin Cordes | USA | 59.22s | 2.09 | 2 | 0.69 | 27.39s | 3. | | 5. Joao Gomes |  BRA | 59.31s | 2.18 | 1 | 0.68 | 27.46s | 4. | | 6. Yasuhiro Koseki |  JPN | 59.37s | 2.24 | 6 | 0.69 | 28.17s | 6. | | 7. Felipe Franca | BRA | 59.38s | 2.25 | 7 | 0.67 | 28.69s | 8. | | 8. Dmitriy Balandin |  KAZ | 59.95s | 2.82 | 8 | 0.69 | 28.48s | 7. |
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| WR: Adam Peaty (GBR) | 57.92s | London (GBR) 17 Apr 2015 | | OR: Cameron van der Burgh (RSA) | 57.55s | London (GBR) 29 Jul 2012 | | WJ: Michael Andrew (USA) | 1:00.68 | San Antonio, TX (USA) 6 Aug 2015 |
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| | | First 8 advanced to Final. |
| Ranking | time | L | HR | | 1. Adam Peaty |  Great Britain | 57.62s | 4 | 1 2. | | 2. Cody Miller |  United States | 59.05s | 3 | 2 2. | | 3. Cameron van der Burgh |  South Africa | 59.21s | 6 | 3 2. | | 4. Yasuhiro Koseki |  Japan | 59.23s | 4 | 1 1. | | 5. Kevin Cordes | United States | 59.33s | 5 | 2 1. | | 6. Felipe França Silva |  Brazil | 59.35s | 5 | 4 2. | | 7. João Gomes Júnior | Brazil | 59.40s | 6 | 3 1. | | 8. Dmitriy Balandin |  Kazakhstan | 59.45s | 2 | 5 2. | | eliminated | | 9. Jake Packard |  Australia | 59.48s | 3 | 4 1. | | 10.Giedrius Titenis |  Lithuania | 59.80s | 7 | 5 1. | | 11.Ross Murdoch | Great Britain | 1:00.05 | 2 | 6 1. | | 12.Christian vom Lehn |  Germany | 1:00.23 | 8 | 6 2. | | 13.Li Xiang |  China | 1:00.25 | 7 | 7 2. | | 14.Vsevolod Zanko |  Russia | 1:00.39 | 1 | 8 2. | | 15.Glenn Snyders |  New Zealand | 1:00.50 | 8 | 7 1. | | below Olympic Qualifyng Time 1:00.57. | | 16.Jorge Murillo |  Colombia | 1:00.81 | 1 | 8 1. |
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| Ranking | time | L | H | | 1. Adam Peaty | Great Britain | 57.55s WR | 4 | 6. | | 2. Yasuhiro Koseki | Japan | 58.91s | 6 | 4. | | 3. Felipe França Silva | Brazil | 59.01s SA | 3 | 5. | | 4. Kevin Cordes | United States | 59.13s | 4 | 4. | | 5. Cody Miller | United States | 59.17s | 5 | 4. | | 6. Jake Packard | Australia | 59.26s | 6 | 6. | | 7. Cameron van der Burgh | South Africa | 59.35s | 4 | 5. | | 8. João Gomes Júnior | Brazil | 59.46s | 5 | 5. | | 9. Dmitriy Balandin | Kazakhstan | 59.47s | 3 | 4. | | 9. Ross Murdoch | Great Britain | 59.47s | 3 | 6. | | 11.Li Xiang | China | 59.55s | 1 | 6. | | 12.Giedrius Titenis | Lithuania | 59.90s | 5 | 6. | | 13.Vsevolod Zanko | Russia | 59.91s | 2 | 6. | | 14.Jorge Murillo | Colombia | 59.93s | 5 | 3. | | 15.Christian vom Lehn | Germany | 1:00.13 | 2 | 4. | | 16.Glenn Snyders | New Zealand | 1:00.26 | 7 | 4. | | eliminated | | 16.Gyurta Dániel |  Hungary | 1:00.26 | 8 | 4. | | 18.Ippei Watanabe | Japan | 1:00.33 | 1 | 5. | | 19.Panagiotis Samilidis |  Greece | 1:00.35 | 8 | 6. | | 20.Kirill Prigoda | Russia | 1:00.37 | 6 | 5. | | 21.Damir Dugonjič |  Slovenia | 1:00.41 | 7 | 5. | | 22.Andrea Toniato |  Italy | 1:00.45 | 8 | 5. | | below Olympic Qualifyng Time 1:00.57. | | 23.Andrius Šidlauskas | Lithuania | 1:00.59 | 3 | 3. | | 24.Yannick Käser |  Switzerland | 1:00.71 | 5 | 2. | | 24.Jason Block |  Canada | 1:00.71 | 7 | 3. | | 26.Silađi Čaba |  Serbia | 1:00.76 | 2 | 5. | | 27.Laurent Carnol |  Luxembourg | 1:00.88 | 8 | 3. | | 27.Yan Zibei | China | 1:00.88 | 7 | 6. | | 29.Marcin Stolarski |  Poland | 1:01.06 | 1 | 4. | | 30.Carlos Claverie |  Venezuela | 1:01.13 | 4 | 2. | | 30.Joshua Palmer | Australia | 1:01.13 | 4 | 3. | | 32.Erik Persson |  Sweden | 1:01.20 | 6 | 2. | | 33.Nicholas Quinn |  Ireland | 1:01.29 | 3 | 2. | | 34.Vladislav Mustafin |  Uzbekistan | 1:01.66 | 1 | 3. | | 35.Anton Sveinn McKee |  Island | 1:01.84 | 6 | 3. | | 36.Azad Al-Barazi |  Syria | 1:02.22 | 2 | 2. | | 37.Radomyos Matjiur |  Thailand | 1:02.36 | 5 | 1. | | 38.Matti Mattsson |  Finland | 1:02.45 | 1 | 2. | | 39.Martin Melconian |  Uruguay | 1:02.67 | 4 | 1. | | 40.Julian Fletcher |  Bermuda | 1:02.73 | 3 | 1. | | 41.Crespo Édgar |  Panama | 1:02.78 | 7 | 2. | | below Olympic Selection Time (OST) 1:02.79. | | 42.Tomáš Klobučník |  Slovakia | 1:02.93 | 2 | 3. | | 43.Benjamin Schulte |  Guam | 1:03.29 | 2 | 1. | | 44.Dustin Tynes |  Bahamas | 1:03.71 | 8 | 2. | | 45.Amini Fonua |  Tonga | 1:06.40 | 6 | 1. | | 46.Corey Ollivierre |  Grenada | 1:08.68 | 7 | 1. |
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| Semi-Finals 06.08 Saturday Night. | | Heats 06.08 Saturday Afternoon. |
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| Olympic Qualifyng Time (OQT) 1:00.57 - NOC can enter up to 2 swimmers with OQT. | | Olympic Selection Time (OST) 1:02.79, invitantional - A swwimer meeting the "invitation" standard was eligible for entry. But this entry was allotted/filled by ranking. |
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| Olympic Qualifyng Time by NOC - 29 Swimmers - addtional 17 Swimmers. | | 2 Quotas - 8 NOC | | Olympic Qualifying Time – 1:00.57 | | 2 |  Australia | Jake Packard | Joshua Palmer | | 2 |  Brazil | Felipe França Silva | João Gomes Júnior | | 2 |  China | Li Xiang | Yan Zibei | | 2 |  Great_Britain | Adam Peaty | Ross Murdoch | | 2 |  Japan | Yasuhiro Koseki | Ippei Watanabe | | 2 |  Lithuania | Andrius Šidlauskas | Giedrius Titenis | | 2 |  Russia | Kirill Prigoda | Vsevolod Zanko | | 2 |  United_States | Kevin Cordes | Cody Miller | | 1 Quota 13 NOC | | 1 |  Colombia | Jorge Murillo | | 1 |  Germany | Christian vom Lehn | | 1 |  Greece | Panagiotis Samilidis | | 1 |  Hungary | Gyurta Dániel | | 1 |  Iceland | Anton Sveinn McKee | | 1 |  Italy | Andrea Toniato | | 1 |  Kazakhstan | Dmitriy Balandin | | 1 |  New_Zealand | Glenn Snyders | | 1 |  Poland | Marcin Stolarski | | 1 |  Serbia | Silađi Ĭaba | | 1 |  Slovakia | Tomáš Klobučník | | 1 |  Slovenia | Damir Dugonjič | | 1 |  South_Africa | Cameron van der Burgh | | Olympic Selection Time – 1:02.69 - 13 NOC | | 1 |  Bahamas | Dustin Tynes | [b] | | 1 |  Canada | Jason Block | | 1 |  Finland | Matti Mattsson | [a] | | 1 |  Ireland | Nicholas Quinn | [a] | | 1 |  Luxembourg | Laurent Carnol | [a] | | 1 |  Panama | Edgar Crespo | [b] | | 1 |  Switzerland | Yannick Käser | [a] | | 1 |  Sweden | Erik Persson | [a] | | 1 |  Syria | Azad Al-Barazi | [b] | | 1 |  Thailand | Radomyos Matjiur | [b] | | 1 |  Uruguay | Martín Melconian | [b] | | 1 |  Uzbekistan | Vladislav Mustafin | [b] | | 1 |  Venezuela | Carlos Claverie | [a] | | Universalitiy Places - 4 NOC | | 1 |  Bermuda | Julian Fletcher | | 1 |  Grenada | Corey Ollivierre | | 1 |  Guam | Benjamin Schulte | | 1 |  Tonga | Amini Fonua | | 46 | Total |
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