# Swimming at the 2015 World Aquatics Championships – Men's 50 metre backstroke

The Men's 50 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 8 August with the heats and the semifinals and 9 August with the final.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Liam Tancock (GBR) | 24.04 | Rome, Italy | 2 August 2009 |
| Competition record | Liam Tancock (GBR) | 24.04 | Rome, Italy | 2 August 2009 |

## Results
### Heats

The heats were held at 09:54.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Camille Lacourt | France | 24.56 | Q |
| 2 | 5 | 3 | Matt Grevers | United States | 24.68 | Q |
| 3 | 6 | 4 | Ben Treffers | Australia | 24.74 | Q |
| 4 | 5 | 5 | Mitch Larkin | Australia | 24.77 | Q |
| 5 | 6 | 5 | David Plummer | United States | 24.79 | Q |
| 6 | 6 | 6 | Liam Tancock | Great Britain | 24.91 | Q |
| 7 | 7 | 5 | Jérémy Stravius | France | 24.95 | Q |
| 8 | 7 | 7 | Pavel Sankovich | Belarus | 24.97 | Q, NR |
| 9 | 7 | 6 | Carl Schwarz | Germany | 25.12 | Q |
| 10 | 6 | 2 | Jonatan Kopelev | Israel | 25.14 | Q |
| 11 | 7 | 2 | Simone Sabbioni | Italy | 25.21 | Q |
| 12 | 7 | 3 | Tomasz Polewka | Poland | 25.25 | Q |
| 13 | 5 | 1 | Grigory Tarasevich | Russia | 25.27 | Q |
| 13 | 7 | 4 | Vladimir Morozov | Russia | 25.27 | Q |
| 15 | 5 | 7 | Lavrans Solli | Norway | 25.28 | Q |
| 16 | 6 | 3 | Miguel Ortiz-Cañavate | Spain | 25.29 | QSO |
| 16 | 6 | 1 | Guilherme Guido | Brazil | 25.29 | QSO |
| 18 | 5 | 6 | Guy Barnea | Israel | 25.31 | |
| 19 | 5 | 0 | Park Seon-kwan | South Korea | 25.33 | |
| 20 | 7 | 8 | Quah Zheng Wen | Singapore | 25.44 | |
| 21 | 4 | 6 | Ralf Tribuntsov | Estonia | 25.45 | |
| 22 | 4 | 4 | Robert Glință | Romania | 25.48 | |
| 23 | 4 | 5 | Masaki Kaneko | Japan | 25.49 | |
| 24 | 6 | 8 | Apostolos Christou | Greece | 25.50 | |
| 25 | 5 | 2 | Juan Miguel Rando | Spain | 25.54 | |
| 26 | 6 | 0 | François Heersbrandt | Belgium | 25.55 | |
| 27 | 4 | 1 | Federico Grabich | Argentina | 25.60 | |
| 28 | 3 | 1 | Alexis Santos | Portugal | 25.70 | |
| 29 | 7 | 1 | Xu Jiayu | China | 25.71 | |
| 30 | 5 | 8 | I Gede Siman Sudartawa | Indonesia | 25.77 | |
| 31 | 6 | 7 | Russell Wood | Canada | 25.79 | |
| 32 | 7 | 0 | Viktar Staselovich | Belarus | 25.85 | |
| 33 | 4 | 7 | Iskender Baskalov | Turkey | 25.94 | |
| 34 | 4 | 3 | Albert Subirats | Venezuela | 26.07 | |
| 35 | 4 | 8 | Ryan Pini | Papua New Guinea | 26.11 | |
| 36 | 7 | 9 | Lê Nguyễn Paul | Vietnam | 26.14 | |
| 37 | 5 | 9 | Janis Šaltans | Latvia | 26.19 | |
| 38 | 4 | 2 | Kasipat Chograthin | Thailand | 26.20 | |
| 39 | 4 | 9 | Omar Pinzón | Colombia | 26.27 | |
| 40 | 3 | 5 | Mohamed Hussein | Egypt | 26.42 | |
| 40 | 3 | 3 | Daniil Bukin | Uzbekistan | 26.42 | |
| 42 | 3 | 8 | Jamal Chavoshifar | Iran | 26.53 | |
| 43 | 3 | 7 | David McLeod | Trinidad and Tobago | 26.54 | |
| 44 | 4 | 0 | Charles Hockin | Paraguay | 26.57 | |
| 45 | 2 | 5 | Merdan Atayev | Turkmenistan | 26.64 | |
| 46 | 3 | 6 | Martin Zhelev | Bulgaria | 26.66 | |
| 47 | 3 | 0 | Tern Tern | Malaysia | 26.73 | |
| 48 | 3 | 4 | Daniel Ramírez | Mexico | 26.84 | |
| 49 | 2 | 6 | David van der Colff | Botswana | 26.88 | |
| 50 | 3 | 2 | Riyad Djendouci | Algeria | 27.20 | |
| 51 | 3 | 9 | Ngou Pok Man | Macau | 27.20 | |
| 52 | 2 | 3 | Timothy Wynter | Jamaica | 27.21 | |
| 53 | 2 | 7 | Eisner Barbarena | Nicaragua | 27.35 | |
| 54 | 2 | 2 | Hamdan Bayusuf | Kenya | 27.74 | |
| 55 | 2 | 4 | Yaaqoub Al-Saadi | United Arab Emirates | 28.04 | |
| 56 | 2 | 8 | Noah Mascoll-Gomes | Antigua and Barbuda | 28.69 | |
| 57 | 2 | 1 | Samson Opuakpo | Nigeria | 28.70 | |
| 58 | 2 | 9 | Mohammad Ahmed | Bangladesh | 29.10 | |
| 59 | 2 | 0 | Faraj Saleh | Bahrain | 29.66 | |
| 60 | 1 | 3 | Adam Allouche | Lebanon | 29.91 | |
| 61 | 1 | 4 | Arnold Kisulo | Uganda | 29.98 | |
| 62 | 1 | 5 | Kerry Ollivierre | Grenada | 30.42 | |
| 63 | 1 | 6 | Kwesi Jackson | Ghana | 31.08 | |
| 64 | 1 | 7 | Ramziyor Khorkashov | Tajikistan | 33.15 | |
| 65 | 1 | 8 | Santisouk Inthavong | Laos | 33.24 | |
| 66 | 1 | 2 | Tano Atta | Ivory Coast | 33.92 | |
| 67 | 1 | 0 | Ebrahim Al-Maleki | Yemen | 34.19 | |
| 68 | 1 | 1 | Moris Beale | Sierra Leone | 35.85 | |
| | 6 | 9 | Gábor Balog | Hungary | | DNS |

#### Swim-off

It was established that there would be a swim-off between the Brazilian Guilherme Guido and the Spanish Miguel Ortiz. However Guido chose not to swim the race, preferring to rest and focus on the 4 × 100 medley relay.

### Semifinals

The semifinals were held on 8 August at 18.45.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Matt Grevers | United States | 24.59 | Q |
| 2 | 5 | Mitch Larkin | Australia | 24.65 | Q |
| 3 | 3 | Liam Tancock | Great Britain | 24.75 | Q |
| 4 | 1 | Vladimir Morozov | Russia | 24.77 | Q |
| 5 | 6 | Pavel Sankovich | Belarus | 25.02 | |
| 6 | 2 | Jonatan Kopelev | Israel | 25.04 | |
| 7 | 7 | Tomasz Polewka | Poland | 25.11 | NR |
| 8 | 8 | Miguel Ortiz-Cañavate | Spain | 25.19 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Camille Lacourt | France | 24.27 | Q |
| 2 | 5 | Ben Treffers | Australia | 24.64 | Q |
| 3 | 3 | David Plummer | United States | 24.82 | Q |
| 4 | 8 | Lavrans Solli | Norway | 24.93 | Q, NR |
| 5 | 6 | Jérémy Stravius | France | 24.94 | |
| 6 | 7 | Simone Sabbioni | Italy | 25.05 | |
| 7 | 2 | Carl Schwarz | Germany | 25.20 | |
| 8 | 1 | Grigory Tarasevich | Russia | 25.42 | |

### Final

The final was held on 9 August at 16:32.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Camille Lacourt | France | 24.23 | |
| | 5 | Matt Grevers | United States | 24.61 | |
| | 3 | Ben Treffers | Australia | 24.69 | |
| 4 | 6 | Mitch Larkin | Australia | 24.70 | |
| 5 | 7 | Vladimir Morozov | Russia | 24.73 | |
| 6 | 8 | Lavrans Solli | Norway | 24.84 | NR |
| 7 | 2 | Liam Tancock | Great Britain | 24.88 | |
| 8 | 1 | David Plummer | United States | 24.95 | |