# 2021 FINA World Swimming Championships (25 m) – Men's 200 metre butterfly

The Men's 200 metre butterfly competition of the 2021 FINA World Swimming Championships (25 m) was held on 16 December 2021.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Daiya Seto (JPN) | 1:48.24 | Hangzhou, China | 11 December 2018 |
| Competition record | Daiya Seto (JPN) | 1:48.24 | Hangzhou, China | 11 December 2018 |

## Results
### Heats

The heats were started at 10:24.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 7 | Trenton Julian | United States | 1:50.32 | Q |
| 2 | 5 | 4 | Chad le Clos | South Africa | 1:50.63 | Q |
| 3 | 3 | 2 | Noè Ponti | Switzerland | 1:50.82 | Q, NR |
| 4 | 5 | 6 | Kregor Zirk | Estonia | 1:50.92 | Q, NR |
| 5 | 4 | 4 | Alberto Razzetti | Italy | 1:51.33 | Q |
| 6 | 3 | 6 | Antani Ivanov | Bulgaria | 1:51.49 | Q, NR |
| 7 | 3 | 3 | José Martínez | Mexico | 1:51.58 | Q |
| 8 | 3 | 4 | Tomoe Hvas | Norway | 1:51.83 | Q |
| 9 | 4 | 6 | Krzysztof Chmielewski | Poland | 1:51.84 | |
| 10 | 3 | 1 | Sajan Prakash | India | 1:52.10 | NR |
| 11 | 4 | 5 | Zach Harting | United States | 1:52.40 | |
| 12 | 3 | 5 | Aleksandr Kharlanov | Russian Swimming Federation | 1:52.67 | |
| 13 | 5 | 2 | Louis Croenen | Belgium | 1:52.84 | NR |
| 14 | 5 | 3 | Aleksandr Kudashev | Russian Swimming Federation | 1:52.86 | |
| 15 | 4 | 2 | Sebastian Luňák | Czech Republic | 1:53.28 | |
| 16 | 5 | 5 | Ramon Klenz | Germany | 1:53.61 | |
| 17 | 4 | 3 | Leonardo de Deus | Brazil | 1:53.94 | |
| 18 | 4 | 8 | Adilbek Mussin | Kazakhstan | 1:54.40 | NR |
| 19 | 4 | 7 | Edward Mildred | Great Britain | 1:55.51 | |
| 20 | 5 | 7 | Denys Kesil | Ukraine | 1:55.70 | |
| 21 | 4 | 1 | Moon Seung-woo | South Korea | 1:55.77 | |
| 22 | 3 | 8 | Navaphat Wongcharoen | Thailand | 1:56.55 | NR |
| 23 | 5 | 0 | Richard Nagy | Slovakia | 1:56.93 | NR |
| 24 | 4 | 0 | Luis Vega Torres | Cuba | 1:57.89 | |
| 25 | 2 | 5 | Jorge Otaiza | Venezuela | 1:58.02 | NR |
| 26 | 2 | 6 | Carlos Vásquez | Honduras | 1:58.41 | NR |
| 27 | 5 | 1 | Efe Turan | Turkey | 1:58.62 | |
| 28 | 2 | 4 | Hồ Nguyễn Duy Khoa | Vietnam | 1:58.82 | |
| 29 | 4 | 9 | Matin Balsini | Iran | 1:58.83 | NR |
| 30 | 3 | 0 | Ramil Valizade | Azerbaijan | 1:59.74 | |
| 31 | 3 | 9 | Keanan Dols | Jamaica | 2:00.52 | |
| 32 | 1 | 5 | Mathew Bennici | Cambodia | 2:00.95 | NR |
| 33 | 2 | 3 | Ho Tin Long | Hong Kong | 2:01.43 | |
| 34 | 2 | 7 | Salvador Gordo | Angola | 2:03.30 | |
| 35 | 2 | 2 | Simon Bachmann | Seychelles | 2:04.29 | |
| 36 | 2 | 1 | Davor Petrovski | North Macedonia | 2:04.55 | |
| 37 | 1 | 2 | Ghalib Sabt | United Arab Emirates | 2:06.57 | |
| 38 | 1 | 3 | Johnpaul Balloqui | Gibraltar | 2:08.07 | NR |
| 39 | 2 | 8 | Alush Telaku | Kosovo | 2:09.62 | |
| 40 | 2 | 9 | Gerald Hernández | Nicaragua | 2:10.29 | |
| 41 | 1 | 4 | Mashari Al-Samhan | Kuwait | 2:11.87 | |
| 42 | 1 | 6 | Siraj Al Sharif | Libya | 2:21.43 | |
| | 2 | 0 | Philip Adejumo | Nigeria | DNS | |
| | 5 | 8 | Ong Jung Yi | Singapore | DNS | |
| | 5 | 9 | Jaouad Syoud | Algeria | DNS | |

### Final

The final was held at 18:42.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 2 | Alberto Razzetti | Italy | 1:49.06 | NR |
| | 3 | Noè Ponti | Switzerland | 1:49.81 | NR |
| | 5 | Chad le Clos | South Africa | 1:49.84 | |
| 4 | 4 | Trenton Julian | United States | 1:50.01 | |
| 5 | 6 | Kregor Zirk | Estonia | 1:50.68 | NR |
| 6 | 7 | Antani Ivanov | Bulgaria | 1:51.62 | |
| 7 | 1 | José Martínez | Mexico | 1:52.00 | |
| 8 | 8 | Tomoe Hvas | Norway | 1:53.06 | |