The men's 100 metre backstroke competition at the 2023 World Aquatics Championships was held on 24 and 25 July 2023.

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

Results Heats The heats were started on 24 July at 10:51.

Rank Heat Lane Name Nationality Time Notes 1 6 5 Xu Jiayu 52.87 Q 2 7 1 Hubert Kós 53.12 Q, NR 3 7 3 Ksawery Masiuk 53.15 Q 4 6 4 Ryan Murphy 53.43 Q 5 6 7 Oliver Morgan 53.52 Q 6 5 3 Mewen Tomac 53.57 Q 6 6 6 Ole Braunschweig 53.57 Q 6 7 2 Roman Mityukov 53.57 Q 9 5 6 Hugo González 53.70 Q 10 5 1 João Costa 53.71 Q, NR 11 6 1 Bradley Woodward 53.72 Q 12 7 7 Kacper Stokowski 53.81 Q 13 6 2 Andrew Jeffcoat 53.82 Q 14 7 4 Thomas Ceccon 53.84 Q 15 5 5 Yohann Ndoye-Brouard 53.90 Q 16 5 4 Hunter Armstrong 53.94 Q 17 7 6 Isaac Cooper 53.95 18 6 3 Ryosuke Irie 53.98 19 7 5 Apostolos Christou 54.01 20 5 8 Lee Ju-ho 54.21 21 5 2 Benedek Kovács 54.24 22 6 8 Conor Ferguson 54.36 23 7 0 Guilherme Basseto 54.45 24 6 0 Tomáš Franta 54.50 25 7 8 Cameron Brooker 54.54 26 5 7 Javier Acevedo 54.58 27 4 5 Markus Lie 54.66 28 4 7 Chuang Mu-lun 54.95 NR 29 4 3 Berke Saka 55.09 30 5 9 Erikas Grigaitis 55.23 31 7 9 Srihari Nataraj 55.26 32 4 4 Quah Zheng Wen 55.30 33 5 0 Michael Laitarovsky 55.63 34 4 6 Andrei-Mircea Anghel 55.77 35 4 1 Diego Camacho 55.80 36 4 2 Ģirts Feldbergs 55.91 37 4 8 Ziyad Ahmed 56.02 38 3 3 Jack Kirby 56.08 39 3 5 Charles Hockin 56.56 40 3 8 Maximillian Wilson 56.65 41 2 5 Merdan Ataýew 56.96 42 3 9 Jack Harvey 57.04 NR 43 4 9 Armin Evert Lelle 57.06 44 3 6 Noe Pantskhava 57.10 45 2 3 Yazan Al-Bawwab 57.16 46 2 6 Denilson Cyprianos 57.29 NR 47 3 0 Davante Carey 57.50 48 3 7 Filippos Iakovidis 57.51 49 4 0 Farrel Tangkas 58.06 50 3 2 Lau Shiu Yue 58.21 51 3 4 Jerard Jacinto Suspended Member Federation 58.40 52 3 1 Homer Abbasi 58.45 53 2 4 Zhulian Lavdaniti 58.48 54 2 2 Matthieu Seye 58.59 55 1 4 Mohamad Zubaid 59.56 56 2 0 Zeke Chan 59.61 57 2 8 Zackary Gresham 59.68 58 2 1 Bede Aitu 59 1 3 Omer Huraish 60 1 5 Ali Imaan 61 2 9 Adnan Kabuye 2 7 Erkhes Enkhtur 6 9 Bernhard Reitshammer

Semifinals The semifinals were started on 24 July at 20:17.

Rank Heat Lane Name Nationality Time Notes 1 1 1 Thomas Ceccon 52.16 Q 2 2 4 Xu Jiayu 52.42 Q 3 1 5 Ryan Murphy 52.56 Q 4 1 3 Mewen Tomac 52.86 Q 5 2 8 Yohann Ndoye-Brouard 53.06 Q 6 1 4 Hubert Kós 53.17 Q 7 2 5 Ksawery Masiuk 53.20 Q 8 1 8 Hunter Armstrong 53.21 Q 9 2 3 Oliver Morgan 53.26 10 1 6 Roman Mityukov 53.32 NR 11 2 2 Hugo González 53.38 12 2 1 Andrew Jeffcoat 53.46 13 2 7 Bradley Woodward 53.73 14 1 7 Kacper Stokowski 53.96 15 2 6 Ole Braunschweig 54.00 16 1 2 João Costa 54.30

Final The final was held on 25 July at 20:59.

Rank Lane Name Nationality Time Notes 3 Ryan Murphy 52.22 4 Thomas Ceccon 52.27 8 Hunter Armstrong 52.58 4 5 Xu Jiayu 52.64 5 2 Yohann Ndoye-Brouard 52.84 6 1 Ksawery Masiuk 52.92 7 7 Hubert Kós 53.11 8 6 Mewen Tomac 53.16

References