# Swimming at the 2011 World Aquatics Championships – Men's 100 metre breaststroke

The men's 100 metre breaststroke 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 Championship record | Brenton Rickard | Australia | 58.58 | Rome | July 27, 2009 |

## Results
### Heats

83 swimmers participated in 11 heats, qualified swimmers are listed:
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 10 | 4 | Alexander Dale Oen | Norway | 59.71 | Q |
| 2 | 9 | 2 | Glenn Snyders | New Zealand | 59.94 | Q, NR |
| 3 | 11 | 4 | Kosuke Kitajima | Japan | 59.96 | Q |
| 4 | 10 | 3 | Felipe França Silva | Brazil | 1:00.01 | Q |
| 5 | 9 | 6 | Fabio Scozzoli | Italy | 1:00.14 | Q |
| 6 | 9 | 3 | Mark Gangloff | United States | 1:00.29 | Q |
| 7 | 11 | 3 | Christian Sprenger | Australia | 1:00.35 | Q |
| 8 | 9 | 4 | Ryo Tateishi | Japan | 1:00.37 | Q |
| 9 | 9 | 5 | Hugues Duboscq | France | 1:00.38 | Q |
| 10 | 11 | 5 | Cameron van der Burgh | South Africa | 1:00.39 | Q |
| 11 | 11 | 7 | Dániel Gyurta | Hungary | 1:00.40 | Q |
| 12 | 10 | 8 | Giedrius Titenis | Lithuania | 1:00.41 | Q |
| 13 | 10 | 5 | Brenton Rickard | Australia | 1:00.48 | Q |
| 14 | 11 | 1 | Hendrik Feldwehr | Germany | 1:00.70 | Q |
| 15 | 10 | 7 | Michael Jamieson | Great Britain | 1:00.79 | Q |
| 16 | 10 | 1 | Lennart Stekelenburg | Netherlands | 1:00.86 | Q |
| 17 | 9 | 7 | Roman Sludnov | Russia | 1:00.91 | |
| 18 | 11 | 8 | Andrew Dickens | Canada | 1:01.18 | |
| 19 | 8 | 8 | Dragos Arache | Romania | 1:01.19 | |
| 20 | 8 | 4 | Igor Borysik | Ukraine | 1:01.25 | |
| 20 | 8 | 2 | Mattia Pesce | Italy | 1:01.25 | |
| 22 | 10 | 2 | Christian vom Lehn | Germany | 1:01.26 | |
| 23 | 8 | 6 | Xie Zhi | China | 1:01.30 | |
| 24 | 11 | 2 | Felipe Lima | Brazil | 1:01.37 | |
| 25 | 11 | 6 | Mihail Alexandrov | United States | 1:01.41 | |
| 26 | 8 | 5 | Kristopher Gilchrist | Great Britain | 1:01.46 | |
| 27 | 7 | 1 | Jakob Sveinsson | Iceland | 1:01.51 | |
| 28 | 8 | 1 | Valerii Dymo | Ukraine | 1:01.52 | |
| 29 | 7 | 6 | Matjaž Markič | Slovenia | 1:01.56 | |
| 30 | 7 | 5 | Laurent Carnol | Luxembourg | 1:01.57 | |
| 31 | 6 | 5 | Čaba Silađi | Serbia | 1:01.59 | |
| 32 | 9 | 8 | Anton Lobanov | Russia | 1:01.64 | |
| 33 | 7 | 3 | Damir Dugonjič | Slovenia | 1:01.69 | |
| 34 | 10 | 6 | Neil Versfeld | South Africa | 1:01.72 | |
| 35 | 5 | 8 | Petr Bartunek | Czech Republic | 1:01.75 | |
| 36 | 7 | 4 | Chen Cheng | China | 1:01.81 | |
| 37 | 6 | 3 | Choi Kyu-Woong | South Korea | 1:01.83 | |
| 38 | 8 | 3 | Vladislav Polyakov | Kazakhstan | 1:01.85 | |
| 39 | 7 | 7 | Hunor Mate | Austria | 1:01.88 | |
| 40 | 6 | 6 | Édgar Crespo | Panama | 1:01.94 | |
| 41 | 7 | 2 | Ákos Molnár | Hungary | 1:02.11 | |
| 42 | 5 | 4 | Carlos Almeida | Portugal | 1:02.13 | NR |
| 43 | 8 | 7 | Dawid Szulich | Poland | 1:02.24 | |
| 44 | 5 | 1 | Miguel Ferreira | Venezuela | 1:02.29 | NR |
| 45 | 4 | 3 | Gal Nevo | Israel | 1:02.32 | |
| 46 | 6 | 7 | Lovro Bilonić | Croatia | 1:02.44 | |
| 47 | 9 | 1 | Barry Murphy | Ireland | 1:02.50 | |
| 48 | 5 | 5 | Malick Fall | Senegal | 1:02.55 | |
| 49 | 5 | 6 | Sandeep Sejwal | India | 1:02.62 | |
| 50 | 5 | 7 | Tomáš Klobučník | Slovakia | 1:02.69 | |
| 51 | 6 | 1 | Ömer Aslanoğlu | Turkey | 1:02.71 | |
| 51 | 6 | 8 | Jakob Dorch | Sweden | 1:02.71 | |
| 53 | 4 | 4 | Jorge Murillo | Colombia | 1:02.73 | |
| 54 | 6 | 2 | Martti Aljand | Estonia | 1:02.78 | |
| 55 | 7 | 8 | Panagiotis Samilidis | Greece | 1:02.80 | |
| 56 | 5 | 2 | Genaro Britez | Paraguay | 1:03.44 | |
| 57 | 5 | 3 | David Oliver Mercado | Mexico | 1:03.57 | |
| 58 | 6 | 4 | Indra Gunawan | Indonesia | 1:03.80 | |
| 59 | 4 | 6 | Amini Fonua | Tonga | 1:04.02 | |
| 60 | 4 | 7 | Azad Al-Barazi | Syria | 1:04.23 | |
| 61 | 4 | 2 | Nabil Kebbab | Algeria | 1:04.50 | |
| 61 | 4 | 1 | Rodion Davelaar | Netherlands Antilles | 1:04.50 | |
| 63 | 3 | 5 | Timothy Ferris | Zimbabwe | 1:04.76 | NR |
| 64 | 4 | 8 | Julian Fletcher | Bermuda | 1:05.00 | |
| 65 | 3 | 4 | Diego Santander | Chile | 1:05.72 | |
| 66 | 3 | 3 | Juan Guerra | El Salvador | 1:05.88 | |
| 67 | 3 | 1 | Diguan Pigot | Suriname | 1:06.00 | |
| 68 | 3 | 8 | Andrea Agius | Malta | 1:06.13 | NR |
| 69 | 3 | 6 | Mubarak Al-Besher | United Arab Emirates | 1:06.70 | |
| 70 | 2 | 4 | Jordy Groters | Aruba | 1:06.88 | |
| 71 | 3 | 7 | Oluseyi Fatayi-Williams | Nigeria | 1:07.57 | |
| 72 | 2 | 5 | Benjamin Schulte | Guam | 1:07.62 | |
| 73 | 2 | 6 | Wael Koubrousli | Lebanon | 1:09.11 | |
| 74 | 2 | 3 | Tarco Liobet | Bolivia | 1:09.80 | |
| 75 | 3 | 2 | Shajahan Ali | Bangladesh | 1:10.22 | |
| 76 | 2 | 1 | Mamitina Ramanantsoa | Madagascar | 1:11.96 | |
| 77 | 2 | 2 | Indra Rakotondrazanaka | Madagascar | 1:13.38 | |
| 78 | 2 | 8 | Mamadou Fofana | Mali | 1:16.86 | |
| 79 | 1 | 4 | Fdingue Ekane | Cameroon | 1:19.30 | |
| 80 | 2 | 7 | Ruslan Oliftaev | Tajikistan | 1:25.82 | |
| 81 | 1 | 3 | Thierry Videgni | Benin | 1:34.34 | |
| | 4 | 5 | Mohammad Alirezaei | Iran | DNS | |
| | 1 | 5 | Mohamed Camara | Guinea | DSQ | |
* ^1 Mohammad Alirezaei pulled out of his heat because Israeli Gal Nevo was also scheduled to swim in the heat. Iran does not recognize Israel as a country.

### Semifinals

The semifinals were held 19:06.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | Cameron van der Burgh | South Africa | 1:00.07 | Q |
| 2 | 3 | Mark Gangloff | United States | 1:00.19 | Q |
| 3 | 7 | Giedrius Titenis | Lithuania | 1:00.26 | Q |
| 4 | 6 | Ryo Tateishi | Japan | 1:00.36 | |
| 5 | 8 | Lennart Stekelenburg | Netherlands | 1:00.50 | |
| 6 | 4 | Glenn Snyders | New Zealand | 1:00.59 | |
| 7 | 5 | Felipe França Silva | Brazil | 1:00.73 | |
| 8 | 1 | Hendrik Feldwehr | Germany | 1:00.91 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Alexander Dale Oen | Norway | 59.37 | Q |
| 2 | 5 | Kosuke Kitajima | Japan | 59.77 | Q |
| 3 | 3 | Fabio Scozzoli | Italy | 59.83 | Q, NR |
| 4 | 1 | Brenton Rickard | Australia | 1:00.04 | Q |
| 5 | 7 | Dániel Gyurta | Hungary | 1:00.23 | Q, NR |
| 6 | 6 | Christian Sprenger | Australia | 1:00.44 | |
| 7 | 2 | Hugues Duboscq | France | 1:00.56 | |
| 8 | 8 | Michael Jamieson | Great Britain | 1:00.93 | |

### Final

The final was held 19:27.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Alexander Dale Oen | Norway | 58.71 | NR |
| | 3 | Fabio Scozzoli | Italy | 59.42 | NR |
| | 2 | Cameron van der Burgh | South Africa | 59.49 | |
| 4 | 5 | Kosuke Kitajima | Japan | 1:00.03 | |
| 5 | 6 | Brenton Rickard | Australia | 1:00.11 | |
| 6 | 1 | Dániel Gyurta | Hungary | 1:00.25 | |
| 6 | 8 | Giedrius Titenis | Lithuania | 1:00.25 | |
| 8 | 7 | Mark Gangloff | United States | 1:00.52 | |