# Swimming at the 2023 World Aquatics Championships – Men's 100 metre freestyle

The men's 100 metre freestyle competition at the 2023 World Aquatics Championships was held on 26 and 27 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | David Popovici (ROU) | 46.86 | Rome, Italy | 13 August 2022 |
| Competition record | César Cielo (BRA) | 46.91 | Rome, Italy | 30 July 2009 |

## Results
### Heats

The heats were held on 26 July at 10:47.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 10 | 3 | Matt Richards | Great Britain | 47.59 | Q, NR |
| 2 | 12 | 6 | Jack Alexy | United States | 47.68 | Q |
| 3 | 10 | 4 | Kyle Chalmers | Australia | 47.71 | Q |
| 4 | 10 | 9 | Jordan Crooks | Cayman Islands | 47.77 | Q, NR |
| 5 | 11 | 4 | Pan Zhanle | China | 47.84 | Q |
| 6 | 12 | 4 | David Popovici | Romania | 47.90 | Q |
| 7 | 11 | 5 | Joshua Liendo | Canada | 48.03 | Q |
| 8 | 12 | 5 | Maxime Grousset | France | 48.06 | Q |
| 9 | 10 | 5 | Alessandro Miressi | Italy | 48.14 | Q |
| 10 | 11 | 8 | Dylan Carter | Trinidad and Tobago | 48.16 | Q, NR |
| 11 | 11 | 6 | Flynn Southam | Australia | 48.18 | Q |
| 12 | 12 | 1 | Hwang Sun-woo | South Korea | 48.20 | Q |
| 12 | 12 | 7 | Andrej Barna | Serbia | 48.20 | Q |
| 14 | 11 | 3 | Nándor Németh | Hungary | 48.21 | Q |
| 14 | 11 | 7 | Diogo Ribeiro | Portugal | 48.21 | Q |
| 16 | 11 | 1 | Guilherme Caribé Santos | Brazil | 48.34 | Q |
| 17 | 12 | 8 | Szebasztián Szabó | Hungary | 48.36 | |
| 18 | 10 | 7 | Chris Guiliano | United States | 48.41 | |
| 19 | 10 | 8 | Cameron Gray | New Zealand | 48.43 | |
| 20 | 12 | 9 | Manuel Frigo | Italy | 48.45 | |
| 21 | 10 | 6 | Katsuhiro Matsumoto | Japan | 48.58 | |
| 22 | 11 | 2 | Wang Haoyu | China | 48.64 | |
| 22 | 12 | 0 | Mikel Schreuders | Aruba | 48.64 | |
| 24 | 11 | 9 | Javier Acevedo | Canada | 48.67 | |
| 25 | 10 | 2 | Rafael Miroslaw | Germany | 48.68 | |
| 26 | 8 | 6 | Ralph Daleiden | Luxembourg | 48.77 | NR |
| 26 | 9 | 6 | Youssef Ramadan | Egypt | 48.77 | NR |
| 28 | 10 | 1 | Tomer Frankel | Israel | 48.78 | |
| 29 | 9 | 3 | Kamil Sieradzki | Poland | 48.80 | |
| 30 | 10 | 0 | Björn Seeliger | Sweden | 48.82 | |
| 31 | 12 | 3 | Lewis Burras | Great Britain | 48.99 | |
| 32 | 9 | 7 | Danas Rapšys | Lithuania | 49.00 | |
| 33 | 8 | 5 | Shane Ryan | Ireland | 49.04 | |
| 34 | 9 | 5 | Jonathan Tan | Singapore | 49.08 | |
| 35 | 9 | 2 | Luis Domínguez | Spain | 49.11 | |
| 36 | 11 | 0 | Heiko Gigler | Austria | 49.20 | |
| 37 | 9 | 4 | Jorge Iga | Mexico | 49.24 | |
| 38 | 9 | 9 | Vladyslav Bukhov | Ukraine | 49.48 | |
| 39 | 7 | 3 | Adilbek Mussin | Kazakhstan | 49.64 | |
| 40 | 8 | 4 | Daniel Zaitsev | Estonia | 49.68 | |
| 41 | 9 | 8 | Odysseus Meladinis | Greece | 49.78 | |
| 42 | 9 | 1 | Alberto Mestre | Venezuela | 49.80 | |
| 43 | 8 | 8 | Clayton Jimmie | South Africa | 49.95 | |
| 44 | 7 | 4 | Xander Skinner | Namibia | 50.00 | NR |
| 45 | 8 | 2 | Guido Buscaglia | Argentina | 50.02 | |
| 46 | 8 | 0 | Nicholas Lia | Norway | 50.16 | |
| 47 | 7 | 5 | Ian Ho | Hong Kong | 50.21 | |
| 48 | 8 | 3 | Nils Liess | Switzerland | 50.24 | |
| 49 | 7 | 7 | Wesley Roberts | Cook Islands | 50.27 | |
| 50 | 7 | 6 | Matej Duša | Slovakia | 50.34 | |
| 51 | 1 | 4 | Matthew Abeysinghe | Sri Lanka | 50.46 | |
| 52 | 8 | 1 | Dulyawat Kaewsriyong | Thailand | 50.64 | |
| 53 | 6 | 0 | Leo Nolles | Uruguay | 50.87 | |
| 54 | 7 | 8 | Adi Mešetović | Bosnia and Herzegovina | 51.00 | |
| 55 | 7 | 2 | Simon Doueihy | Lebanon | 51.08 | |
| 56 | 6 | 4 | Gabriel Martínez | Honduras | 51.10 | NR |
| 56 | 9 | 0 | Oussama Sahnoune | Algeria | 51.10 | |
| 58 | 7 | 0 | Waleed Abdulrazzaq | Kuwait | 51.15 | |
| 59 | 8 | 7 | Nikolas Antoniou | Cyprus | 51.23 | |
| 60 | 6 | 9 | Omar Abbass | Syria | 51.24 | |
| 61 | 7 | 9 | Samyar Abdoli | Iran | 51.32 | |
| 62 | 8 | 9 | Luong Jérémie Loïc Nino | Vietnam | 51.34 | |
| 63 | 7 | 1 | Artur Barseghyan | Armenia | 51.36 | |
| 64 | 5 | 4 | Jeancarlo Calderón | Panama | 51.42 | |
| 65 | 6 | 6 | Stefano Mitchell | Antigua and Barbuda | 51.46 | |
| 65 | 6 | 7 | Yousuf Al-Matrooshi | United Arab Emirates | 51.46 | |
| 67 | 6 | 2 | Jayhan Odlum-Smith | Saint Lucia | 51.51 | |
| 68 | 6 | 5 | Alaa Masoo | Athlete Refugee Team | 51.76 | |
| 69 | 6 | 1 | Colins Ebingha | Nigeria | 51.90 | |
| 70 | 5 | 2 | Enkhtamir Batbayar | Mongolia | 51.96 | NR |
| 70 | 6 | 8 | Steven Aimable | Senegal | 51.96 | |
| 72 | 4 | 4 | Yazan Al-Bawwab | Palestine | 52.01 | NR |
| 73 | 6 | 3 | Hansel McCaig | Fiji | 52.10 | |
| 74 | 5 | 6 | Musa Zhalayev | Turkmenistan | 52.29 | |
| 75 | 5 | 3 | Henrique Mascarenhas | Angola | 52.38 | |
| 76 | 5 | 5 | Tomàs Lomero | Andorra | 52.53 | |
| 77 | 5 | 8 | Tendo Mukalazi | Uganda | 52.56 | NR |
| 78 | 5 | 7 | Benedict Parfit | Bermuda | 52.63 | |
| 79 | 5 | 0 | Mohammed Bedour | Jordan | 52.69 | |
| 80 | 1 | 2 | Alex Joachim | Saint Vincent and the Grenadines | 52.78 | |
| 81 | 2 | 8 | Alexander Shah | Nepal | 52.94 | |
| 82 | 4 | 8 | Monyo Maina | Suspended Member Federation | 53.03 | |
| 83 | 5 | 1 | Collins Saliboko | Tanzania | 53.30 | |
| 84 | 4 | 1 | José Alberto Quintanilla | Bolivia | 53.32 | |
| 85 | 4 | 0 | Issa Al-Adawi | Oman | 53.67 | |
| 86 | 4 | 5 | Leon Seaton | Guyana | 53.75 | |
| 86 | 5 | 9 | Brandon Schuster | Samoa | 53.75 | |
| 88 | 4 | 2 | Ado Gargović | Montenegro | 53.97 | |
| 89 | 3 | 3 | Syed Muhammad Haseeb Tariq | Pakistan | 53.99 | |
| 90 | 4 | 6 | Filipe Gomes | Malawi | 54.05 | |
| 91 | 4 | 3 | Dylan Cachia | Malta | 54.32 | |
| 92 | 1 | 7 | Yousef Al-Khulafi | Qatar | 54.34 | |
| 93 | 4 | 7 | Belly-Cresus Ganira | Burundi | 54.51 | |
| 94 | 4 | 9 | Finau Ohuafi | Tonga | 54.56 | |
| 95 | 3 | 5 | Justino Pale | Mozambique | 54.68 | |
| 96 | 3 | 9 | Israel Poppe | Guam | 54.95 | |
| 97 | 3 | 8 | Josh Tarere | Papua New Guinea | 55.27 | |
| 98 | 3 | 0 | Zeke Chan Zhi Yue | Brunei | 55.37 | |
| 99 | 3 | 6 | Marc Dansou | Benin | 55.43 | |
| 100 | 3 | 4 | Md Asif Reza | Bangladesh | 55.84 | |
| 101 | 2 | 1 | Abdulhai Ashour | Libya | 55.87 | |
| 102 | 3 | 1 | Sangay Tenzin | Bhutan | 55.95 | |
| 103 | 3 | 2 | Cedrick Niyibizi | Rwanda | 56.18 | NR |
| 104 | 3 | 7 | Jonathan Raharvel | Madagascar | 57.64 | |
| 105 | 2 | 4 | Travis Sakurai | Palau | 57.86 | |
| 106 | 2 | 3 | Kyler Kihleng | Micronesia | 58.21 | |
| 107 | 2 | 9 | Santisouk Inthavong | Laos | 58.25 | |
| 108 | 2 | 6 | Edgar Iro | Solomon Islands | 59.94 | |
| 109 | 2 | 5 | Ekow Gwira | Ghana | 1:01.18 | |
| 110 | 1 | 3 | Johnathan Silas | Vanuatu | 1:02.02 | |
| 111 | 1 | 5 | Hugo Nguiche | Cameroon | 1:03.00 | NR |
| 112 | 2 | 2 | Phillip Kinono | Marshall Islands | 1:03.13 | |
| 113 | 2 | 0 | Pap Jonga | Gambia | 1:05.48 | |
| 114 | 2 | 7 | Jolanio Guterres | Timor-Leste | 1:12.97 | |
| 115 | 1 | 6 | Pedro Rogery | Guinea-Bissau | 1:18.28 | NR |
| | 12 | 2 | Marcelo Chierighini | Brazil | Did not start | Did not start |

### Semifinals

The semifinals were held on 26 July at 20:26.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Matt Richards | Great Britain | 47.47 | Q, NR |
| 2 | 2 | 5 | Kyle Chalmers | Australia | 47.52 | Q |
| 3 | 2 | 3 | Pan Zhanle | China | 47.61 | Q |
| 4 | 1 | 1 | Nándor Németh | Hungary | 47.62 | Q |
| 5 | 1 | 3 | David Popovici | Romania | 47.66 | Q |
| 6 | 1 | 5 | Jordan Crooks | Cayman Islands | 47.71 | Q, NR |
| 7 | 1 | 6 | Maxime Grousset | France | 47.87 | Q |
| 8 | 1 | 4 | Jack Alexy | United States | 48.06 | Q |
| 9 | 1 | 7 | Hwang Sun-woo | South Korea | 48.08 | |
| 10 | 2 | 8 | Diogo Ribeiro | Portugal | 48.13 | |
| 11 | 2 | 7 | Flynn Southam | Australia | 48.15 | |
| 12 | 1 | 8 | Guilherme Caribé Santos | Brazil | 48.18 | |
| 13 | 2 | 2 | Alessandro Miressi | Italy | 48.21 | |
| 14 | 2 | 6 | Joshua Liendo | Canada | 48.22 | |
| 15 | 2 | 1 | Andrej Barna | Serbia | 48.43 | |
| 16 | 1 | 2 | Dylan Carter | Trinidad and Tobago | 48.60 | |

### Final

The final was held on 27 July at 20:21.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Kyle Chalmers | Australia | 47.15 | |
| | 8 | Jack Alexy | United States | 47.31 | |
| | 1 | Maxime Grousset | France | 47.42 | |
| 4 | 3 | Pan Zhanle | China | 47.43 | AS |
| 5 | 4 | Matt Richards | Great Britain | 47.45 | NR |
| 6 | 2 | David Popovici | Romania | 47.83 | |
| 7 | 7 | Jordan Crooks | Cayman Islands | 47.94 | |
| 8 | 6 | Nándor Németh | Hungary | 48.17 | |