# Swimming at the 2015 World Aquatics Championships – Men's 100 metre backstroke

The Men's 100 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 3 August with the heats and the semifinals and 4 August with the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Aaron Peirsol (USA) | 51.94 | Indianapolis, United States | 8 July 2009 |
| Competition record | Aaron Peirsol (USA) | 52.19 | Rome, Italy | 2 August 2009 |

## Results
### Heats

The heats were held on 3 August at 09:49.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 5 | Mitch Larkin | Australia | 52.50 | Q, OC |
| 2 | 7 | 4 | Matt Grevers | United States | 53.21 | Q |
| 3 | 6 | 4 | Xu Jiayu | China | 53.29 | Q |
| 4 | 6 | 6 | Liam Tancock | Great Britain | 53.35 | Q |
| 5 | 7 | 5 | Ryosuke Irie | Japan | 53.37 | Q |
| 6 | 6 | 3 | Guilherme Guido | Brazil | 53.57 | Q |
| 7 | 5 | 4 | Chris Walker-Hebborn | Great Britain | 53.64 | Q |
| 8 | 5 | 2 | Grigory Tarasevich | Russia | 53.69 | Q |
| 9 | 7 | 3 | Evgeny Rylov | Russia | 53.74 | Q |
| 10 | 6 | 1 | Jan-Philip Glania | Germany | 53.78 | Q |
| 11 | 7 | 6 | Simone Sabbioni | Italy | 53.83 | Q |
| 12 | 5 | 3 | Jérémy Stravius | France | 53.92 | Q |
| 12 | 6 | 2 | Camille Lacourt | France | 53.92 | Q |
| 12 | 7 | 7 | Yakov Toumarkin | Israel | 53.92 | Q |
| 15 | 5 | 6 | Ben Treffers | Australia | 54.00 | Q |
| 16 | 5 | 5 | David Plummer | United States | 54.06 | Q |
| 17 | 7 | 2 | Masaki Kaneko | Japan | 54.19 | |
| 18 | 5 | 1 | Radosław Kawęcki | Poland | 54.20 | |
| 19 | 6 | 8 | Tomasz Polewka | Poland | 54.26 | |
| 20 | 5 | 9 | Li Guangyuan | China | 54.34 | |
| 21 | 7 | 9 | Quah Zheng Wen | Singapore | 54.40 | NR |
| 22 | 7 | 0 | Corey Main | New Zealand | 54.51 | |
| 23 | 4 | 4 | Gábor Balog | Hungary | 54.65 | |
| 24 | 7 | 8 | Christian Diener | Germany | 54.75 | |
| 25 | 6 | 0 | Park Seon-kwan | South Korea | 54.80 | |
| 26 | 6 | 7 | Christopher Ciccarese | Italy | 54.81 | |
| 26 | 6 | 9 | Juan Miguel Rando | Spain | 54.81 | |
| 28 | 5 | 0 | Danas Rapšys | Lithuania | 54.86 | |
| 29 | 5 | 7 | Russell Wood | Canada | 54.90 | |
| 30 | 4 | 3 | Robert Glință | Romania | 55.07 | |
| 31 | 7 | 1 | Apostolos Christou | Greece | 55.10 | |
| 32 | 4 | 1 | Ralf Tribuntsov | Estonia | 55.13 | NR |
| 33 | 4 | 0 | Dylan Carter | Trinidad and Tobago | 55.24 | |
| 34 | 4 | 5 | Lavrans Solli | Norway | 55.28 | |
| 35 | 5 | 8 | Pavel Sankovich | Belarus | 55.79 | |
| 36 | 3 | 3 | Mohamed Hussein | Egypt | 55.85 | |
| 37 | 3 | 8 | Rexford Tullius | Virgin Islands | 55.88 | |
| 38 | 4 | 7 | Omar Pinzón | Colombia | 55.90 | |
| 39 | 3 | 4 | Lukas Rauftlin | Switzerland | 56.11 | |
| 40 | 4 | 6 | Janis Šaltans | Latvia | 56.15 | |
| 41 | 3 | 6 | Ryan Pini | Papua New Guinea | 56.39 | |
| 41 | 4 | 9 | I Gede Siman Sudartawa | Indonesia | 56.39 | |
| 43 | 3 | 5 | Doruk Tekin | Turkey | 56.57 | |
| 44 | 4 | 8 | Lê Nguyễn Paul | Vietnam | 56.95 | |
| 45 | 3 | 7 | Petar Petrović | Serbia | 57.44 | |
| 46 | 2 | 6 | Timothy Wynter | Jamaica | 57.47 | |
| 47 | 2 | 2 | Boris Kirillov | Azerbaijan | 57.50 | |
| 48 | 3 | 9 | Martin Zhelev | Bulgaria | 57.55 | |
| 49 | 2 | 3 | Merdan Ataýew | Turkmenistan | 57.57 | |
| 50 | 3 | 0 | Charles Hockin | Paraguay | 57.84 | |
| 51 | 2 | 1 | David van der Colff | Botswana | 57.95 | |
| 52 | 3 | 1 | Jamal Chavoshifar | Iran | 58.75 | |
| 53 | 1 | 5 | Eisner Barbarena | Nicaragua | 58.95 | |
| 54 | 2 | 5 | Ngou Pok Man | Macau | 59.12 | |
| 55 | 2 | 0 | Jean Gómez | Dominican Republic | 59.69 | |
| 56 | 2 | 9 | Lushano Lamprecht | Namibia | 59.77 | |
| 57 | 1 | 4 | Hamdan Bayusuf | Kenya | 1:00.07 | |
| 58 | 2 | 8 | Driss Lahrichi | Morocco | 1:00.42 | |
| 59 | 1 | 3 | Adel Elfakir | Libya | 1:00.84 | |
| 60 | 2 | 7 | Yaaqoub Al-Saadi | United Arab Emirates | 1:01.04 | |
| 61 | 1 | 2 | Mohammed Bedour | Jordan | 1:02.33 | |
| 62 | 1 | 7 | Mohammad Ahmed | Bangladesh | 1:04.28 | |
| 63 | 1 | 1 | Farhan Saleh | Bahrain | 1:04.94 | |
| 64 | 1 | 8 | Noah Al-Khulaifi | Qatar | 1:05.36 | |
| 65 | 1 | 6 | Arnold Kisulo | Uganda | 1:06.14 | |
| 66 | 1 | 0 | Temaruata Strickland | Cook Islands | 1:10.89 | |
| 67 | 1 | 9 | Htut Ahnt Khaung | Myanmar | 1:12.90 | |
| | 2 | 4 | Daniel Ramírez | Mexico | DNS | |
| | 4 | 2 | Albert Subirats | Venezuela | DNS | |
| | 3 | 2 | Armando Barrera | Cuba | DSQ | |

### Semifinals

The semifinals were held on 3 August at 17:48.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Matt Grevers | United States | 52.73 | Q |
| 2 | 5 | Liam Tancock | Great Britain | 53.19 | Q |
| 3 | 8 | David Plummer | United States | 53.54 | |
| 4 | 6 | Grigory Tarasevich | Russia | 53.64 | |
| 5 | 1 | Yakov Toumarkin | Israel | 53.77 | |
| 6 | 2 | Jan-Philip Glania | Germany | 53.78 | |
| 7 | 3 | Guilherme Guido | Brazil | 53.88 | |
| 8 | 7 | Jérémy Stravius | France | 54.54 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Mitch Larkin | Australia | 52.38 | Q, OC |
| 2 | 1 | Camille Lacourt | France | 52.70 | Q |
| 3 | 3 | Ryosuke Irie | Japan | 53.13 | Q |
| 4 | 2 | Evgeny Rylov | Russia | 53.14 | Q |
| 5 | 5 | Xu Jiayu | China | 53.15 | Q |
| 6 | 6 | Chris Walker-Hebborn | Great Britain | 53.39 | Q |
| 7 | 7 | Simone Sabbioni | Italy | 53.60 | |
| | 8 | Ben Treffers | Australia | DSQ | |

### Final

The final was held on 4 August at 18:36.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Mitch Larkin | Australia | 52.40 |
| | 5 | Camille Lacourt | France | 52.48 |
| | 3 | Matt Grevers | United States | 52.66 |
| 4 | 7 | Xu Jiayu | China | 52.89 |
| 5 | 8 | Chris Walker-Hebborn | Great Britain | 53.02 |
| 6 | 6 | Ryosuke Irie | Japan | 53.10 |
| 7 | 2 | Evgeny Rylov | Russia | 53.23 |
| 8 | 1 | Liam Tancock | Great Britain | 53.37 |