# Swimming at the 2017 World Aquatics Championships – Men's 200 metre butterfly

The Men's 200 metre butterfly competition at the 2017 World Championships was held on 25 and 26 July 2017.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Michael Phelps (USA) | 1:51.51 | Rome, Italy | 29 July 2009 |
| Competition record | Michael Phelps (USA) | 1:51.51 | Rome, Italy | 29 July 2009 |

## Results
### Heats

The heats were held on 25 July at 10:12.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | László Cseh | Hungary | 1:54.08 | Q |
| 2 | 4 | 5 | Daiya Seto | Japan | 1:54.89 | Q |
| 3 | 5 | 6 | Viktor Bromer | Denmark | 1:55.13 | Q |
| 4 | 4 | 8 | Antani Ivanov | Bulgaria | 1:55.55 | Q NR |
| 5 | 5 | 5 | Chad le Clos | South Africa | 1:55.90 | Q |
| 6 | 4 | 4 | Masato Sakai | Japan | 1:55.94 | Q |
| 7 | 3 | 4 | Tamás Kenderesi | Hungary | 1:55.96 | Q |
| 8 | 3 | 5 | Jack Conger | United States | 1:56.00 | Q |
| 9 | 4 | 7 | Daniil Pakhomov | Russia | 1:56.07 | Q |
| 10 | 4 | 2 | Jan Świtkowski | Poland | 1:56.20 | Q |
| 11 | 5 | 3 | Pace Clark | United States | 1:56.23 | Q |
| 12 | 4 | 6 | Giacomo Carini | Italy | 1:56.52 | Q |
| 13 | 3 | 6 | David Morgan | Australia | 1:56.57 | Q |
| 14 | 3 | 7 | Jonathan Gómez | Colombia | 1:56.60 | Q NR |
| 15 | 5 | 2 | Grant Irvine | Australia | 1:56.61 | Q |
| 16 | 4 | 3 | Leonardo de Deus | Brazil | 1:56.71 | Q |
| 17 | 5 | 7 | Louis Croenen | Belgium | 1:56.75 | |
| 18 | 3 | 2 | Quah Zheng Wen | Singapore | 1:56.76 | |
| 19 | 4 | 1 | Marcos Lavado | Venezuela | 1:57.37 | |
| 20 | 3 | 8 | Nils Liess | Switzerland | 1:57.96 | |
| 21 | 3 | 3 | Li Zhuhao | China | 1:58.63 | |
| 22 | 5 | 8 | Wang Zhou | China | 1:58.88 | |
| 23 | 3 | 1 | Miguel Nascimento | Portugal | 1:59.02 | |
| 24 | 5 | 1 | Stefanos Dimitriadis | Greece | 1:59.07 | |
| 25 | 5 | 9 | Patrick Stäber | Austria | 1:59.10 | |
| 26 | 3 | 0 | Joan Lluís Pons | Spain | 1:59.41 | |
| 27 | 3 | 9 | Etay Gurevich | Israel | 1:59.87 | |
| 28 | 5 | 0 | Brendan Hyland | Ireland | 1:59.91 | |
| 29 | 2 | 2 | Bradlee Ashby | New Zealand | 2:00.53 | |
| 30 | 2 | 4 | Sajan Prakash | India | 2:00.57 | |
| 31 | 2 | 1 | Deividas Margevičius | Lithuania | 2:00.63 | NR |
| 32 | 4 | 0 | Tomáš Havránek | Czech Republic | 2:01.50 | |
| 33 | 4 | 9 | Kim Moon-kee | South Korea | 2:02.31 | |
| 34 | 2 | 8 | Ayman Kelzi | Syria | 2:01.44 | |
| 35 | 2 | 7 | Chou Wei-liang | Chinese Taipei | 2:01.49 | |
| 36 | 2 | 5 | Michael Gunning | Jamaica | 2:01.73 | |
| 37 | 2 | 3 | Luis Martínez | Guatemala | 2:03.10 | |
| 38 | 2 | 6 | Lazaro Vergara | Cuba | 2:03.19 | |
| 39 | 1 | 3 | Nguyễn Ngọc Huỳnh | Vietnam | 2:03.57 | |
| 40 | 1 | 4 | Rami Anis | FINA Independent Athletes | 2:06.02 | |
| 41 | 2 | 9 | Matthew Lowe | Bahamas | 2:06.29 | |
| 42 | 1 | 6 | Mikhail Umnov | Malta | 2:06.45 | |
| 43 | 2 | 0 | Jeerakit Soammanus | Thailand | 2:07.30 | |
| 44 | 1 | 5 | Duran Alfonso | Honduras | 2:12.21 | |

### Semifinals

The semifinals were held on 25 July at 19:04.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Daiya Seto | Japan | 1:54.03 | Q |
| 2 | 6 | Jack Conger | United States | 1:55.30 | Q |
| 3 | 3 | Masato Sakai | Japan | 1:55.57 | Q |
| 4 | 5 | Antani Ivanov | Bulgaria | 1:55.58 | Q |
| 5 | 2 | Jan Świtkowski | Poland | 1:55.84 | |
| 6 | 7 | Giacomo Carini | Italy | 1:56.59 | |
| 7 | 8 | Leonardo de Deus | Brazil | 1:56.85 | |
| 8 | 1 | Jonathan Gómez | Colombia | 1:57.60 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | László Cseh | Hungary | 1:54.22 | Q |
| 2 | 6 | Tamás Kenderesi | Hungary | 1:54.98 | Q |
| 3 | 3 | Chad le Clos | South Africa | 1:55.09 | Q |
| 4 | 5 | Viktor Bromer | Denmark | 1:55.39 | Q |
| 5 | 7 | Pace Clark | United States | 1:55.82 | |
| 6 | 2 | Daniil Pakhomov | Russia | 1:55.84 | |
| 7 | 8 | Grant Irvine | Australia | 1:56.33 | |
| 8 | 1 | David Morgan | Australia | 1:57.66 | |

### Final

The final was held on 26 July at 18:01.
| Rank | Lane | Name | Nationality | Time |
| | 6 | Chad le Clos | South Africa | 1:53.33 |
| | 5 | László Cseh | Hungary | 1:53.72 |
| | 4 | Daiya Seto | Japan | 1:54.21 |
| 4 | 3 | Tamás Kenderesi | Hungary | 1:54.73 |
| 5 | 2 | Jack Conger | United States | 1:54.88 |
| 6 | 1 | Masato Sakai | Japan | 1:55.04 |
| 7 | 7 | Viktor Bromer | Denmark | 1:55.30 |
| 8 | 8 | Antani Ivanov | Bulgaria | 1:55.98 |