| 2019 BWF World Junior Championships Boys' Singles | |
| Dates: | – |
| Number Edition: | 21st |
| Level: | 1 |
| Venue: | Kazan Gymnastics Center |
| Location: | Kazan, Russia |
| Previous: | 2018 |
| Next: | 2022 |
The boys' singles of the tournament 2019 BWF World Junior Championships was held from 7 to 13 October 2019.[1] The defending champions is Kunlavut Vitidsarn from Thailand.[2]
See also: 1 and 1. 
Kunlavut Vitidsarn (champion)
See also: 2 and 16. 
Brian Yang (fourth round)
See also: 3 and 5. 
Liu Liang (fifth round)
See also: 4 and 12. Li Yunze (semifinals)
See also: 5 and 10. Syabda Perkasa Belawa (third round)
See also: 6 and 3. Bobby Setiabudi (quarterfinals)
See also: 7 and 7. 
Meiraba Luwang Maisnam (third round)
See also: 8 and 14. Christian Adinata (fourth round)
See also: 9 and 4. 
Georgii Karpov (second round)
See also: 10 and 13. 
Christo Popov (final)
See also: 11 and 15. 
Tomas Toledano (third round)
See also: 12 and 2. Kok Jing Hong (fourth round)
See also: 13 and 6. Yonathan Ramlie (semifinals)
See also: 14 and 8. Ernesto Baschwitz (second round)
See also: 15 and 9. Luka Ban (second round)
See also: 16 and 11. Setthanan Piyawatcharavijit (fifth round)