Rank | Heat | Athlete | Time | Notes | 1 | 3 | {{flagIOC2athlete|I Gede Siman Sudartawa|INA|2018 Asian Games}} | 25.01 |
2 | 5 | {{flagIOC2athlete|Xu Jiayu|CHN|2018 Asian Games}} | 25.12 |
3 | 5 | {{flagIOC2athlete|Ryosuke Irie|JPN|2018 Asian Games}} | 25.25 |
4 | 4 | {{flagIOC2athlete|Kang Ji-seok|KOR|2018 Asian Games}} | 25.29 |
5 | 3 | {{flagIOC2athlete|Wang Peng|CHN|2018 Asian Games}} | 25.33 |
6 | 4 | {{flagIOC2athlete|Quah Zheng Wen|SGP|2018 Asian Games}} | 25.54 |
7 | 4 | {{flagIOC2athlete|Lee Ju-ho|KOR|2018 Asian Games}} | 25.67 |
8 | 3 | {{flagIOC2athlete|Merdan Ataýew|TKM|2018 Asian Games}} | 26.08 |
9 | 4 | {{flagIOC2athlete|Kasipat Chograthin|THA|2018 Asian Games}} | 26.13 |
10 | 1 | {{flagIOC2athlete|Srihari Nataraj|IND|2018 Asian Games}} | 26.19 |
11 | 5 | {{flagIOC2athlete|Paul Lê Nguyễn|VIE|2018 Asian Games}} | 26.20 |
12 | 5 | {{flagIOC2athlete|Masaki Kaneko|JPN|2018 Asian Games}} | 26.23 |
13 | 5 | {{flagIOC2athlete|Adil Kaskabay|KAZ|2018 Asian Games}} | 26.30 |
14 | 4 | {{flagIOC2athlete|Francis Fong|SGP|2018 Asian Games}} | 26.48 |
15 | 4 | {{flagIOC2athlete|Chuang Mu-lun|TPE|2018 Asian Games}} | 26.52 |
16 | 4 | {{flagIOC2athlete|Ngou Pok Man|MAC|2018 Asian Games}} | 26.53 |
17 | 3 | {{flagIOC2athlete|Akalanka Peiris|SRI|2018 Asian Games}} | 26.57 |
18 | 3 | {{flagIOC2athlete|Chang Hou-chi|TPE|2018 Asian Games}} | 26.67 |
19 | 5 | {{flagIOC2athlete|Ricky Anggawijaya|INA|2018 Asian Games}} | 26.82 |
20 | 3 | {{flagIOC2athlete|Tern Jian Han|MAS|2018 Asian Games}} | 26.88 |
21 | 1 | {{flagIOC2athlete|Arvind Mani|IND|2018 Asian Games}} | 26.89 |
22 | 5 | {{flagIOC2athlete|Lau Shiu Yue|HKG|2018 Asian Games}} | 26.93 |
23 | 3 | {{flagIOC2athlete|Cheung Yau Ming|HKG|2018 Asian Games}} | 26.99 |
24 | 5 | {{flagIOC2athlete|Haseeb Tariq|PAK|2018 Asian Games}} | 27.31 |
25 | 4 | {{flagIOC2athlete|Navaphat Wongcharoen|THA|2018 Asian Games}} | 27.37 |
26 | 3 | {{flagIOC2athlete|Mohammed Bedour|JOR|2018 Asian Games}} | 27.40 |
27 | 1 | {{flagIOC2athlete|Noah Al-Khulaifi|QAT|2018 Asian Games}} | 28.75 |
28 | 2 | {{flagIOC2athlete|Abdulaziz Al-Obaidly|QAT|2018 Asian Games}} | 28.78 |
29 | 2 | {{flagIOC2athlete|Muhammad Yahya Khan|PAK|2018 Asian Games}} | 28.79 |
30 | 2 | {{flagIOC2athlete|Yum Cheng Man|MAC|2018 Asian Games}} | 28.88 |
31 | 2 | {{flagIOC2athlete|Boldbaataryn Buyantogtokh|MGL|2018 Asian Games}} | 29.72 |
32 | 2 | {{flagIOC2athlete|Lim Keouodom|CAM|2018 Asian Games}} | 30.68 |
33 | 2 | {{flagIOC2athlete|Santisouk Inthavong|LAO|2018 Asian Games}} | 31.09 |
34 | 1 | {{flagIOC2athlete|Olimjon Ishanov|TJK|2018 Asian Games}} | 31.87 |
35 | 2 | {{flagIOC2athlete|Hussain Haish Hassan|MDV|2018 Asian Games}} | 31.95 |
36 | 1 | {{flagIOC2athlete|Ali Imaan|MDV|2018 Asian Games}} | 32.47 |
37 | 1 | {{flagIOC2athlete|Ramziyor Khorkashov|TJK|2018 Asian Games}} | 33.21 |
38 | 2 | {{flagIOC2athlete|Buman-Uchralyn Bat-Od|MGL|2018 Asian Games}} | 33.56 |
Rank | Athlete | Time | Notes | {{gold1}} | {{flagIOC2athlete|Xu Jiayu|CHN|2018 Asian Games}} | 24.75 |
{{silver2}} | {{flagIOC2athlete|Ryosuke Irie|JPN|2018 Asian Games}} | 24.88 |
{{bronze3}} | {{flagIOC2athlete|Kang Ji-seok|KOR|2018 Asian Games}} | 25.17 |
4 | {{flagIOC2athlete|Wang Peng|CHN|2018 Asian Games}} | 25.28 |
5 | {{flagIOC2athlete|I Gede Siman Sudartawa|INA|2018 Asian Games}} | 25.29 |
6 | {{flagIOC2athlete|Quah Zheng Wen|SGP|2018 Asian Games}} | 25.53 |
7 | {{flagIOC2athlete|Lee Ju-ho|KOR|2018 Asian Games}} | 25.59 |
8 | {{flagIOC2athlete|Merdan Ataýew|TKM|2018 Asian Games}} | 25.88 |
1. ^{{cite web|url=https://en.asiangames2018.id/schedule-results/sport/swimming/|title=Asian Games 2018 Swimming Schedule|publisher=INASGOC|accessdate=19 August 2018}}
2. ^[https://en.asiangames2018.id/sport/swimming/event/swimming-men-50m-backstroke/phase/swm040900/doc/standings/ Heats results]
3. ^[https://en.asiangames2018.id/sport/swimming/event/swimming-men-50m-backstroke/phase/swm040100/ Final results]
{{DEFAULTSORT:Swimming at the 2018 Asian Games - Men's 50 metre backstroke}}