Swimming at the 2018 Summer Youth Olympics – Boys' 100 metre butterfly

The heats were started on 8 October at 10:30.[2]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	4	4	Andrei Minakov	Russia	52.47	Q
2	6	4	Kristóf Milák	Hungary	53.08	Q
3	5	4	Federico Burdisso	Italy	53.13	Q
3	5	5	Jakub Majerski	Poland	53.13	Q
5	5	3	Daniel Cristian Martin	Romania	53.33	Q
6	4	3	Shen Jiahao	China	53.43	Q
7	6	5	Shinnosuke Ishikawa	Japan	53.57	Q
8	6	2	Denys Kesil	Ukraine	53.69	Q
9	6	3	Noè Ponti	Switzerland	53.71	Q
10	6	1	Daniil Markov	Russia	53.91	Q
11	4	6	Ihor Troianovskyi	Ukraine	53.94	Q
12	3	3	Park Jung-hun	South Korea	53.95	Q
13	4	1	Wang Kuan-hung	Chinese Taipei	53.99	Q
14	5	6	Sergueï Comte	France	54.11	Q
15	4	2	Ong Jung Yi	Singapore	54.21	Q
16	5	2	Jake Johnson	United States	54.25	Q
17	6	6	Luca Nik Armbruster	Germany	54.51
18	3	4	Abeiku Jackson	Ghana	54.52
19	4	7	Maurice Ingenrieth	Germany	54.56
19	5	7	Joshua Liendo	Canada	54.56
21	6	7	Tihomir Todorov	Bulgaria	54.67
22	3	7	Nicholas Lim	Hong Kong	55.02
23	3	5	Alex Ahtiainen	Estonia	55.05
24	6	8	Gal Cohen Groumi	Israel	55.22
25	5	8	Ivan Shamshurin	Belarus	55.23
26	3	1	Gal Kordež	Slovenia	55.32
27	2	4	Guillermo Cruz	Mexico	55.46
28	5	1	Kael Yorke	Trinidad and Tobago	55.72
29	2	6	Benjamin Schnapp	Chile	55.75
30	3	6	Hendrik Duvenhage	South Africa	55.86
31	2	3	Vladislav Shuliko	Kyrgyzstan	56.03
32	1	4	Ferran Siré	Spain	56.37
33	4	8	Dominik Karačić	Croatia	56.38
34	2	5	Mohamed Ahmed Mohamed	Egypt	56.66
35	3	8	Samy Boutouil	Morocco	56.95
36	2	2	Yael Touw Ngie Tjouw	Suriname	56.96
36	2	8	Adrián Paseta	Peru	56.96
38	1	5	Yacob Al-Khulaifi	Qatar	57.09
39	2	1	Low Zheng Yong	Malaysia	57.21
40	2	7	Jeerakit Soammanus	Thailand	58.35
41	3	2	Joseph Jackson	Australia	58.38
42	1	6	Lleyton Martin	Antigua and Barbuda	59.32
43	1	2	Ky Odlum	Virgin Islands	1:00.73
44	1	7	Emilien Puyo	Monaco	1:03.69
45	1	1	Ousmane Toure	Mali	1:04.02
	1	3	Efe Turan	Turkey	DSQ
	4	5	Tomoe Zenimoto Hvas	Norway	DNS

The semifinals were started on 8 October at 18:32.[3]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	2	4	Andrei Minakov	Russia	51.94	Q
2	2	5	Federico Burdisso	Italy	52.43	Q
3	1	4	Kristóf Milák	Hungary	52.56	Q
4	2	6	Shinnosuke Ishikawa	Japan	52.67	Q
5	2	3	Daniel Cristian Martin	Romania	52.70	Q
6	1	5	Jakub Majerski	Poland	52.79	Q
7	2	7	Ihor Troianovskyi	Ukraine	52.88	Q
8	1	6	Denys Kesil	Ukraine	53.47	QSO
8	2	2	Noè Ponti	Switzerland	53.47	QSO
10	1	3	Shen Jiahao	China	53.52
11	2	1	Wang Kuan-hung	Chinese Taipei	53.93
12	1	1	Sergueï Comte	France	54.02
13	1	2	Daniil Markov	Russia	54.07
14	1	7	Park Jung-hun	South Korea	54.21
15	1	8	Jake Johnson	United States	54.34
16	2	8	Ong Jung Yi	Singapore	54.70

The swim-off was held on 9 October at 11:29.[4]

Rank	Lane	Name	Nationality	Time	Notes
1	5	Noè Ponti	Switzerland	53.16	Q
2	4	Denys Kesil	Ukraine	53.42

The final was held on 9 October at 18:46.[5]

Rank	Lane	Name	Nationality	Time	Notes
	4	Andrei Minakov	Russia	51.12	NR
	3	Kristóf Milák	Hungary	51.50
	5	Federico Burdisso	Italy	52.42
4	6	Shinnosuke Ishikawa	Japan	52.52
5	1	Ihor Troianovskyi	Ukraine	52.73
6	7	Jakub Majerski	Poland	52.95
7	2	Daniel Cristian Martin	Romania	53.00
8	8	Noè Ponti	Switzerland	53.56