Heats
vendredi 26 juillet 2019, 03h00 GMT – 03h00 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Caeleb Dressel | United States | 50.28″ |
| 2 |  Kristóf Milák | Hungary | + 1.14″ |
| 3 |  Andrey Minakov | Russia | + 1.26″ |
| 4 |  Chad Le Clos | South Africa | + 1.3″ |
| 5 |  Mehdy Metella | France | + 1.37″ |
| 6 |  Vinicius Lanza | Brazil | + 1.55″ |
| 7 | László Cseh | Hungary | + 1.6″ |
| 8 |  Matthew Temple | Australia | + 1.61″ |
| 9 | Jack Conger | United States | + 1.68″ |
| 10 |  Marius Kusch | Germany | + 1.77″ |
| 11 | James Guy | Great Britain | + 1.78″ |
| 12 |  Naoki Mizunuma | Japan | + 1.95″ |
| 13 |  Tomer Frankel | Israel | + 2.08″ |
| 14 | David Morgan | Australia | + 2.16″ |
| 14 |  Yauhen Tsurkin | Belarus | + 2.16″ |
| 14 | Zhuhao Li | China | + 2.16″ |
| 17 | Adilbek Mussin | Kazakhstan | + 2.18″ |
| 18 |  Deividas Margevicius | Lithuania | + 2.27″ |
| 19 |  Federico Burdisso | Italy | + 2.37″ |
| 20 |  Konrad Czerniak | Poland | + 2.49″ |
| 21 |  Ümit Can Güres | Turkey | + 2.58″ |
| 22 | Mathys Goosen | Netherlands | + 2.59″ |
| 23 | Kregor Zirk | Estonia | + 2.64″ |
| 24 | Josiah Binnema | Canada | + 2.65″ |
| 24 | Joseph Schooling | Singapore | + 2.65″ |
| 26 | Piero Codia | Italy | + 2.81″ |
| 27 | Daniel-Cristian Martin | Romania | + 2.87″ |
| 28 | Denys Kesyl | Ukraine | + 3.11″ |
| 29 |  Andreas Vazaios | Greece | + 3.13″ |
| 30 | Ryan Coetzee | South Africa | + 3.18″ |
| 31 | Mihajlo Ceprkalo | Bosnia & Herzegovina | + 3.24″ |
| 32 | Chen-Ping Chu | Chinese Taipei | + 3.3″ |
| 33 | Riku Pöytäkivi | Finland | + 3.34″ |
| 34 | Seok-Hwan Yun | Korea | + 3.36″ |
| 35 | Simon Sjödin | Sweden | + 3.42″ |
| 36 | Bradlee Ashby | New Zealand | + 3.45″ |
| 37 | Benjamín Hockin | Paraguay | + 3.5″ |
| 38 | Jie Chan | Malaysia | + 3.57″ |
| 39 | Roberto Strelkov | Argentina | + 3.83″ |
| 40 | Yusuf Tibazi | Morocco | + 3.93″ |
| 41 | Sajan Prakash | India | + 4.02″ |
| 42 | Nicholas Lim | Hong Kong, China | + 4.08″ |
| 43 | Navaphat Wongcharoen | Thailand | + 4.1″ |
| 44 | Glenn Sutanto | Indonesia | + 4.29″ |
| 45 | Abbas Qali | Kuwait | + 4.39″ |
| 46 | Cadell Lyons | Trinidad & Tobago | + 4.51″ |
| 47 | Abeiku Jackson | Ghana | + 4.66″ |
| 47 | Steven Aimable | Senegal | + 4.66″ |
| 49 | Ralph Goveia | Zambia | + 4.86″ |
| 50 | Ayman Klzie | Syria | + 4.87″ |
| 51 | Alireza Yavari Foroushani | Iran | + 5.35″ |
| 52 | Keanan Dols | Jamaica | + 5.38″ |
| 53 | Teimuraz Kobakhidze | Georgia | + 5.75″ |
| 54 | Bryan Álvarez | Costa Rica | + 5.76″ |
| 55 | Jayhan Odlum-Smith | St. Lucia | + 6.03″ |
| 56 | Artur Barseghyan | Armenia | + 6.24″ |
| 57 | Seggio Bernardina | Curaçao | + 6.26″ |
| 58 | Yousif Bu Arish | Saudi Arabia | + 6.3″ |
| 59 | Yacob Al-Khulaifi | Qatar | + 6.34″ |
| 60 | Rami Anis | + 6.98″ | |
| 61 | Jesse Washington | Bermuda | + 7.01″ |
| 62 | Salvador Gordo | Angola | + 7.04″ |
| 63 | Ifeakachuku Nmor | Nigeria | + 7.37″ |
| 64 | Simon Bachmann | Seychelles | + 7.78″ |
| 65 | Bernat Lomero | Andorra | + 7.84″ |
| 66 | Fernando Ponce | Guatemala | + 7.98″ |
| 67 | Abdulla Yusuf | Bahrain | + 8.16″ |
| 68 | Collins Saliboko | Tanzania | + 8.54″ |
| 69 | Davidson Vincent | Haiti | + 8.63″ |
| 70 | Mathieu Marquet | Mauritius | + 9.75″ |
| 71 | Daniel Christian | Eritrea | + 10.49″ |
| 72 | Ousmane Touré | Mali | + 10.53″ |
| 73 | Émilien Puyo | Monaco | + 10.84″ |
| 74 | Keouodom Lim | Cambodia | + 10.89″ |
| 75 | Simanga Dlamini | Eswatini | + 12.11″ |
| 76 | Belly-Cresus Ganira | Burundi | + 13.06″ |
| 77 | Achala Gekabel | Ethiopia | + 16.12″ |
| Viktor Bromer | Denmark | DNF | |
| Antani Ivanov | Bulgaria | DNF | |
| Tomoe Zenimoto Hvas | Norway | DNF | |
| Irvin Hoost | Suriname | DQ |