2018 FINA World Swimming Championships (25 m) – Men's 50 metre butterfly
The Men's 50 metre butterfly competition of the 2018 FINA World Swimming Championships was held on 14 and 15 December 2018 at the Hangzhou Olympic Sports Center.
Records
Prior to the competition, the existing world and championship records were as follows.| Name | Nation | Time | Location | Date | |
| World record | Nicholas Santos | 21.75 | Budapest | 6 October 2018 | |
| Championship record | Chad le Clos | 21.95 | Doha | 6 December 2014 |
The following new records were set during this competition:
| Date | Event | Name | Nation | Time | Record |
| 16 December | Final | Nicholas Santos | 21.81 | CR |
Results
Heats
The heats were started at 9:52.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 11 | 4 | Nicholas Santos | 22.41 | Q | |
| 2 | 9 | 3 | Dylan Carter | 22.53 | Q | |
| 3 | 11 | 6 | Marius Kusch | 22.59 | Q | |
| 4 | 10 | 4 | Chad le Clos | 22.67 | Q | |
| 5 | 10 | 3 | Takaya Yasue | 22.78 | Q | |
| 6 | 9 | 6 | Mikhail Vekovishchev | 22.79 | Q | |
| 6 | 10 | 2 | Ryan Coetzee | 22.79 | Q | |
| 8 | 10 | 5 | Yauhen Tsurkin | 22.80 | Q | |
| 9 | 9 | 5 | Takeshi Kawamoto | 22.83 | Q | |
| 10 | 9 | 1 | Mehdy Metella | 22.86 | Q | |
| 11 | 11 | 5 | Michael Andrew | 22.93 | Q | |
| 12 | 11 | 3 | Umitcan Gures | 22.96 | Q | |
| 13 | 10 | 1 | Matteo Rivolta | 23.02 | Q | |
| 13 | 10 | 9 | Niksa Stojkovski | 23.02 | Q | |
| 15 | 10 | 7 | Piero Codia | 23.03 | Q | |
| 16 | 9 | 7 | Matheus Santana | 23.08 | ||
| 16 | 11 | 7 | Riku Pöytäkivi | 23.08 | ||
| 18 | 10 | 6 | Deividas Margevičius | 23.10 | ||
| 19 | 11 | 0 | Roman Shevliakov | 23.13 | ||
| 20 | 9 | 0 | Hryhory Pekarski | 23.14 | ||
| 20 | 11 | 1 | Daniel Zaitsev | 23.14 | ||
| 22 | 11 | 8 | Konrad Czerniak | 23.19 | ||
| 23 | 9 | 2 | Li Zhuhao | 23.21 | ||
| 24 | 8 | 4 | Kristian Golomeev | 23.24 | ||
| 25 | 11 | 9 | Damian Wierling | 23.26 | ||
| 26 | 7 | 7 | Adilbek Mussin | 23.35 | ||
| 26 | 11 | 2 | Jesse Puts | 23.35 | ||
| 28 | 8 | 2 | Ben Hockin | 23.37 | ||
| 29 | 8 | 3 | Cameron Jones | 23.40 | ||
| 30 | 7 | 2 | Antani Ivanov | 23.42 | ||
| 31 | 9 | 8 | Wang Peng | 23.48 | ||
| 32 | 8 | 5 | Catalin Ungur | 23.59 | ||
| 33 | 8 | 6 | Julien Henx | 23.63 | ||
| 34 | 9 | 9 | Berk Ozkul | 23.74 | ||
| 35 | 8 | 0 | Adam Halas | 23.76 | ||
| 36 | 8 | 1 | Heiko Gigler | 23.77 | ||
| 37 | 7 | 0 | Alexandre Perreault | 23.80 | ||
| 38 | 7 | 4 | Manuel Leuthard | 23.89 | ||
| 39 | 6 | 3 | Esnaider Reales | 23.96 | ||
| 40 | 7 | 5 | Sajan Prakash | 23.97 | ||
| 41 | 6 | 5 | Chao Man Hou | 24.04 | ||
| 42 | 6 | 7 | Oliver Elliot | 24.06 | ||
| 43 | 7 | 3 | Adi Mešetović | 24.07 | ||
| 44 | 8 | 8 | Christoffer Carlsen | 24.17 | ||
| 45 | 7 | 8 | Ralph Goveia | 24.18 | ||
| 45 | 10 | 0 | Andriy Khloptsov | 24.18 | ||
| 47 | 6 | 4 | Ali Khalafalla | 24.22 | ||
| 47 | 8 | 7 | Cherantha de Silva | 24.22 | ||
| 49 | 8 | 9 | Andrew James Digby | 24.23 | ||
| 50 | 6 | 9 | Abbas Qali | 24.43 | ||
| 51 | 7 | 9 | Anthony Barbar | 24.48 | ||
| 52 | 2 | 4 | Amini Fonua | 24.50 | ||
| 53 | 6 | 6 | Artur Barseghyan | 24.55 | NR | |
| 54 | 2 | 1 | Philipp Adejumo | 24.58 | ||
| 54 | 6 | 8 | N'Nhyn Fernander | 24.58 | ||
| 56 | 5 | 4 | Bryan Alvaréz | 24.73 | ||
| 57 | 6 | 0 | Rafael Barreto | 24.74 | ||
| 57 | 6 | 1 | Noah Al-Khulaifi | 24.74 | ||
| 59 | 6 | 2 | Lin Chieh-liang | 24.77 | ||
| 60 | 2 | 0 | Jose Quintanilla | 24.86 | ||
| 61 | 5 | 5 | Yousif Bu-Arish | 25.10 | ||
| 62 | 5 | 2 | Bernat Lomero | 25.17 | NR | |
| 63 | 5 | 3 | Vladislav Shuliko | 25.20 | ||
| 64 | 2 | 5 | Md Mahamudun Nobi Nahid | 25.25 | ||
| 65 | 5 | 7 | Malcolm Richardson | 25.49 | ||
| 66 | 5 | 0 | Jayhan Odlum-Smith | 25.66 | ||
| 67 | 2 | 8 | Mohammed Isam Sadeq Kazan | 25.95 | ||
| 68 | 4 | 3 | Nabeel Hatoum | 26.10 | ||
| 68 | 4 | 6 | R.A.B Mohamed | 26.10 | ||
| 70 | 1 | 6 | Ali Alkaabi | 26.16 | ||
| 71 | 4 | 2 | Collins Saliboko | 26.19 | ||
| 72 | 5 | 8 | Davidson Vincent | 26.38 | NR | |
| 73 | 5 | 9 | Tryfonas Hadjichristoforou | 26.45 | ||
| 74 | 4 | 4 | Isiaka Irankunda | 26.46 | ||
| 75 | 4 | 5 | Dajenel Williams | 26.52 | ||
| 76 | 4 | 7 | Troy Pina | 26.73 | ||
| 77 | 2 | 3 | A Ahmed Ali Yusuf | 26.85 | ||
| 78 | 2 | 9 | Duran Alfonso | 27.02 | ||
| 79 | 1 | 2 | Nabil Ahmed Saleh | 27.54 | ||
| 80 | 4 | 1 | P.Y.D Poku-Dwumoh | 27.68 | ||
| 81 | 2 | 2 | Carel Irakoze | 27.72 | ||
| 82 | 2 | 6 | Fakhriddin Madkamov | 27.73 | ||
| 83 | 3 | 7 | Abobakr Abass | 27.74 | ||
| 84 | 3 | 0 | Anubhav Subba | 27.95 | ||
| 85 | 3 | 3 | Antonio Andrew Rodrigues | 28.21 | ||
| 86 | 4 | 8 | Simanga Dlamini | 28.54 | ||
| 87 | 1 | 5 | Ratha Phin | 28.85 | ||
| 88 | 3 | 6 | Achala Gekabel | 29.22 | ||
| 89 | 4 | 9 | Nelson Batallones | 29.58 | ||
| 90 | 3 | 1 | Albachir Mouctar | 29.88 | ||
| 91 | 4 | 0 | Slava Sihannouvong | 29.99 | ||
| 92 | 3 | 8 | Jack Parlee | 30.21 | ||
| 93 | 3 | 5 | Jefferson Kpanou | 30.79 | ||
| 94 | 3 | 9 | Joshua Wyse | 31.59 | ||
| 95 | 3 | 4 | Daniel Ranis | 31.73 | ||
| 96 | 2 | 7 | Ian Salaka | 32.62 | ||
| 97 | 1 | 4 | Jessy Misak | 33.19 | ||
| 98 | 1 | 3 | H.T.H. Baidar | 34.20 | ||
| 5 | 6 | Thibaut Danho | DNS | |||
| 7 | 1 | Bradlee Ashby | DNS | |||
| 7 | 6 | Shane Ryan | DNS | |||
| 10 | 8 | Caeleb Dressel | DNS | |||
| 3 | 2 | Houssein Ibrahim | DSQ | |||
| 5 | 1 | Ljupcho Angelovski | DSQ |
Swim-off
The swim-off was held on 14 December at 11:07.| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Riku Pöytäkivi | 22.71 | Q | |
| 2 | 4 | Matheus Santana | 23.18 |
Semifinals
The semifinals were held at 19:33.Semifinal 1
Semifinal 2
Final
The final was held at 19:41.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Nicholas Santos | 21.81 | CR | ||
| 5 | Chad le Clos | 21.97 | |||
| 7 | Dylan Carter | 22.38 | NR | ||
| 4 | 3 | Marius Kusch | 22.40 | ||
| 5 | 1 | Takeshi Kawamoto | 22.50 | ||
| 6 | 2 | Mikhail Vekovishchev | 22.60 | ||
| 6 | 6 | Takaya Yasue | 22.60 | ||
| 8 | 8 | Ryan Coetzee | 22.88 |