# Swimming at the 2011 World Aquatics Championships – Men's 50 metre butterfly

The men's 50 metre butterfly competition of the swimming events at the 2011 World Aquatics Championships took place July 24 and 25. The heats and semifinals took place July 24 and the final was held July 25.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Name | Nation | Time | Location | Date |
| World record | Rafael Muñoz | Spain | 22.43 | Málaga | April 5, 2009 |
| Championship record | Milorad Čavić | Serbia | 22.67 | Rome | July 27, 2009 |

## Results
### Heats

56 swimmers participated in 7 heats, qualified swimmers are listed:
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | César Cielo | Brazil | 23.26 | Q |
| 2 | 6 | 4 | Geoff Huegill | Australia | 23.27 | Q |
| 3 | 5 | 6 | Florent Manaudou | France | 23.31 | Q |
| 4 | 5 | 5 | Jason Dunford | Kenya | 23.48 | Q |
| 5 | 6 | 5 | Steffen Deibler | Germany | 23.50 | Q |
| 6 | 7 | 7 | Ivan Lenđer | Serbia | 23.51 | Q |
| 7 | 6 | 8 | Konrad Czerniak | Poland | 23.52 | Q, NR |
| 8 | 5 | 4 | Matthew Targett | Australia | 23.53 | Q |
| 9 | 6 | 3 | Andriy Govorov | Ukraine | 23.63 | Q |
| 10 | 7 | 3 | Roland Schoeman | South Africa | 23.64 | Q |
| 11 | 6 | 6 | François Heersbrandt | Belgium | 23.73 | Q |
| 12 | 5 | 2 | Milorad Čavić | Serbia | 23.76 | Q |
| 13 | 7 | 8 | Benjamin Hockin | Paraguay | 23.82 | Q |
| 14 | 7 | 5 | Frederick Bousquet | France | 23.84 | Q |
| 15 | 5 | 8 | Antony James | Great Britain | 23.94 | Q |
| 16 | 7 | 2 | Joeri Verlinden | Netherlands | 23.96 | S-Off |
| 16 | 7 | 1 | Nikita Konovalov | Russia | 23.96 | S-Off |
| 18 | 6 | 7 | Octavio Alesi | Venezuela | 23.99 | |
| 19 | 4 | 4 | Peter Mankoč | Slovenia | 24.01 | |
| 20 | 7 | 6 | Mario Todorović | Croatia | 24.05 | |
| 21 | 5 | 1 | Yauheni Tsurkin | Belarus | 24.09 | |
| 22 | 4 | 2 | Yeugeniy Lazuka | Azerbaijan | 24.14 | |
| 23 | 4 | 3 | Marco Belotti | Italy | 24.19 | |
| 23 | 5 | 3 | Cullen Jones | United States | 24.19 | |
| 25 | 6 | 1 | Ryan Pini | Papua New Guinea | 24.26 | |
| 26 | 4 | 1 | Joseph Bartoch | Canada | 24.29 | |
| 27 | 6 | 2 | Zhou Jiawei | China | 24.33 | |
| 28 | 5 | 7 | Elvis Burrows | Bahamas | 24.35 | |
| 29 | 4 | 8 | Joshua McLeod | Trinidad and Tobago | 24.41 | |
| 30 | 4 | 5 | Daniel Bell | New Zealand | 24.43 | |
| 31 | 4 | 6 | Michal Rubáček | Czech Republic | 24.59 | |
| 32 | 4 | 7 | Virdhaval Vikram Khade | India | 24.65 | |
| 33 | 3 | 6 | Marcelino Richaards | Suriname | 25.36 | |
| 34 | 3 | 5 | Serghei Golban | Moldova | 25.37 | |
| 35 | 3 | 4 | Yellow Yeiyah | Nigeria | 25.41 | |
| 36 | 3 | 8 | Ifalemi Paea | Tonga | 25.50 | |
| 37 | 3 | 7 | Andrew Chetcuti | Malta | 25.54 | |
| 38 | 2 | 4 | Javier Hernandez | Honduras | 26.05 | |
| 39 | 3 | 2 | Joao Matias | Angola | 26.06 | |
| 40 | 3 | 1 | Obaid Al-Jasmi | United Arab Emirates | 26.20 | |
| 41 | 3 | 3 | Rami Anis | Syria | 26.22 | |
| 42 | 1 | 3 | Iohanad Dheyaa | Iraq | 27.51 | |
| 43 | 2 | 5 | Mark Thompson | Zambia | 28.90 | |
| 44 | 1 | 1 | Mohamed Abdelrawf Mahmoud | Sudan | 29.02 | |
| 45 | 2 | 3 | John Kamyuka | Botswana | 29.03 | |
| 46 | 2 | 2 | Conrad Gaira | Uganda | 29.36 | |
| 47 | 2 | 6 | Fiseha Hailu | Ethiopia | 29.58 | |
| 48 | 1 | 6 | Khalid Ismaeel Alibaba | Bahrain | 29.95 | |
| 49 | 1 | 4 | Inayath Hassan | Maldives | 30.03 | |
| 50 | 2 | 7 | Tolga Akcayli | Saint Vincent and the Grenadines | 30.05 | |
| 51 | 1 | 2 | Dionisio Augustine II | Micronesia | 30.59 | |
| 52 | 2 | 1 | Chingizov Alisher | Tajikistan | 30.64 | |
| 53 | 2 | 8 | Wei Ching Maou | American Samoa | 31.29 | |
| 54 | 1 | 7 | Kyle Zreibe | Antigua and Barbuda | 36.25 | |
| | 1 | 8 | Abd Mohamed Mahmoud | Sudan | DNS | |
| | 1 | 5 | Amer Ali | Iraq | DSQ | |

### Swimoff

As two swimmers had the same time in the heats at place 16 they had to participate in a swimoff to determine the last semifinal swimmer.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Joeri Verlinden | Netherlands | 23.77 | Q |
| 2 | 5 | Nikita Konovalov | Russia | 23.84 | |

### Semifinals

The semifinals were held at 18:30.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Geoff Huegill | Australia | 23.26 | Q |
| 2 | 5 | Jason Dunford | Kenya | 23.34 | Q |
| 3 | 6 | Matthew Targett | Australia | 23.41 | Q |
| 4 | 1 | Frederick Bousquet | France | 23.42 | Q |
| 5 | 2 | Roland Schoeman | South Africa | 23.48 | |
| 6 | 3 | Ivan Lenđer | Serbia | 23.54 | |
| 7 | 7 | Milorad Čavić | Serbia | 23.59 | |
| 8 | 8 | Joeri Verlinden | Netherlands | 23.73 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | César Cielo | Brazil | 23.19 | Q |
| 2 | 5 | Florent Manaudou | France | 23.32 | Q |
| 3 | 2 | Andriy Govorov | Ukraine | 23.39 | Q |
| 3 | 3 | Steffen Deibler | Germany | 23.39 | Q |
| 5 | 6 | Konrad Czerniak | Poland | 23.48 | NR |
| 6 | 7 | François Heersbrandt | Belgium | 23.68 | |
| 7 | 8 | Antony James | Great Britain | 23.74 | |
| 8 | 1 | Benjamin Hockin | Paraguay | 23.95 | |

### Final

The final was held at 18:39.
| Rank | Lane | Name | Nationality | Time |
| | 4 | César Cielo | Brazil | 23.10 |
| | 1 | Matthew Targett | Australia | 23.28 |
| | 5 | Geoff Huegill | Australia | 23.35 |
| 4 | 8 | Frederick Bousquet | France | 23.38 |
| 5 | 3 | Florent Manaudou | France | 23.49 |
| 6 | 2 | Steffen Deibler | Germany | 23.55 |
| 7 | 6 | Jason Dunford | Kenya | 23.60 |
| 8 | 7 | Andriy Govorov | Ukraine | 23.64 |