The men's 100 metre butterfly competition at the 2023 World Aquatics Championships was held on 28 and 29 July 2023.

Records Prior to the competition, the existing world and championship records were as follows.

Results Heats The heats were started on 28 July at 10:32.

Rank Heat Lane Name Nationality Time Notes 1 7 3 Matthew Temple 50.76 Q 2 7 2 Nyls Korstanje 50.78 Q, NR 3 8 4 Joshua Liendo 50.98 Q 4 7 4 Maxime Grousset 51.00 Q 4 7 5 Noè Ponti 51.00 Q 6 6 4 Dare Rose 51.17 Q 7 7 7 Ilya Kharun 51.33 Q 8 5 5 Josif Miladinov 51.47 Q 8 7 0 Kayky Mota 51.47 Q 10 6 5 Katsuhiro Matsumoto 51.48 Q 11 8 2 James Guy 51.50 Q 12 8 7 Diogo Ribeiro 51.57 Q 13 8 0 Gal Cohen Groumi 51.61 Q 14 6 9 Adilbek Mussin 51.68 Q, NR 15 8 3 Tomer Frankel 51.76 Q 16 6 3 Jacob Peters 51.77 S/off 16 7 6 Thomas Heilman 51.77 S/off 18 6 2 Wang Changhao 51.78 19 8 5 Naoki Mizunuma 51.93 20 6 7 Federico Burdisso 51.98 21 7 1 Piero Codia 52.01 22 7 9 Mario Molla Yanes 52.05 23 6 1 Adrian Jaskiewicz 52.10 24 8 1 Shaun Champion 52.15 25 6 8 Sun Jiajun 52.16 26 8 6 Simon Bucher 52.27 27 6 0 Youssef Ramadan 52.31 27 8 8 Richárd Márton 52.31 29 5 0 Jorge Iga 52.39 30 8 9 Quah Zheng Wen 52.53 31 5 1 Kim Young-beom 52.80 32 4 4 Jarod Hatch Suspended Member Federation 52.87 NR 33 5 2 Lewis Clareburt 52.89 34 5 4 Daniel Zaitsev 52.92 35 4 3 Bryan Leong 52.96 NR 36 7 8 Jan Eric Friese 53.02 37 5 6 Daniel Gracik 53.13 38 5 8 Andreas Vazaios 53.38 39 5 3 Jorge Otaiza 53.44 40 5 7 Max McCusker 53.46 41 4 6 Denys Kesil 53.47 42 4 8 Abeku Jackson 53.73 43 4 5 Navaphat Wongcharoen 53.84 44 4 1 Diego Balbi 53.92 45 4 7 Oskar Hoff 53.97 46 4 9 Steven Aimable 53.98 47 3 8 Tibor Tistan 54.30 48 1 5 Isaiah Aleksenko 54.46 NR 49 4 0 Benjamin Hockin 54.69 50 3 2 Esteban Nuñez del Prado 55.26 51 3 4 Salvador Gordo 55.44 52 3 1 Davante Carey 55.48 53 4 2 Joe Aditya Wijaya Kurniawan 55.55 54 3 5 Tomas Lomero Arenas 55.60 55 3 7 Jeancarlo Calderon Harper 55.63 56 2 6 Christian Jerome 55.83 57 3 3 Jayhan Odlum-Smith 55.86 58 3 6 Yousuf Al-Matrooshi 56.05 59 1 6 Tameea Elhamayda 56.11 60 3 0 Zackary Gresham 56.91 61 3 9 Clinton Opute 57.19 62 2 9 James Hendrix 57.65 63 1 2 Osama Trabulsi 58.90 64 2 4 Mohamad Masoud 58.91 65 2 2 Ali Haidar 59.94 66 2 3 Abdulhai Ashour 59.98 67 2 5 Kokoro Frost 68 1 4 Abdul Al-Kulaibi NR 69 2 1 Kinley Lhendup 70 1 7 Nathaniel Noka 71 2 7 Simanga Dlamini 72 1 3 Nicky Irakoze 73 2 8 Elhadj Diallo 74 2 0 Troy Pina 5 9 Jaouad Syoud 6 6 Hubert Kós

Swim-off The swim-off was started on 28 July at 12:55.

Rank Lane Name Nationality Time Notes 1 4 Jacob Peters 51.39 Q 2 5 Thomas Heilman 51.66

Semifinals The semifinals were held on 28 July at 20:09.

Rank Heat Lane Name Nationality Time Notes 1 1 3 Dare Rose 50.53 Q 2 1 5 Maxime Grousset 50.62 Q 3 2 5 Joshua Liendo 50.75 Q 4 2 4 Matthew Temple 50.89 Q 5 1 4 Nyls Korstanje 50.98 Q 5 2 1 Gal Cohen Groumi 50.98 Q, NR 7 1 2 Katsuhiro Matsumoto 51.16 Q 8 2 3 Noè Ponti 51.17 Q 9 2 6 Ilya Kharun 51.22 10 2 2 Kayky Mota 51.43 10 2 7 James Guy 51.43 12 1 8 Jacob Peters 51.51 13 1 7 Diogo Ribeiro 51.54 14 1 1 Adilbek Mussin 51.81 14 1 6 Josif Miladinov 51.81 16 2 8 Tomer Frankel 52.04

Final The final was started on 29 July at 20:42.

Rank Lane Name Nationality Time Notes 5 Maxime Grousset 50.14 NR 3 Joshua Liendo 50.34 NR 4 Dare Rose 50.46 4 6 Matthew Temple 50.81 5 2 Nyls Korstanje 51.05 6 1 Katsuhiro Matsumoto 51.20 7 8 Noè Ponti 51.23 8 7 Gal Cohen Groumi 51.32

Notes

References