| 2018 BWF World Junior Championships Girls' Singles | |
| Dates: | – |
| Number Edition: | 20th |
| Level: | 1 |
| Venue: | Markham Pan Am Centre |
| Location: | Markham, Canada |
| Previous: | 2017 |
| Next: | 2019 |
The girls' singles of the tournament 2018 BWF World Junior Championships was held on 12–18 November. The defending champions of the last edition is Gregoria Mariska Tunjung from Indonesia.[1]
See also: 1 and 1. 
Wang Zhiyi (semifinals)
See also: 2 and 8. 
Phittayaporn Chaiwan (fourth round)
See also: 3 and 3. Goh Jin Wei (champion)
See also: 4 and 6. Wei Yaxin (semifinals)
See also: 5 and 2. Zhou Meng (quarterfinals)
See also: 6 and 4. 
Hirari Mizui (fourth round)
See also: 7 and 5. 
Vivien Sandorhazi (third round)
See also: 8 and 7. 
Purva Barve (third round)
See also: 9 and 1. Chasinee Korepap (third round)
See also: 10 and 5. 
Jaslyn Hooi Yue Yann (third round)
See also: 11 and 2. Reka Madarasz (second round)
See also: 12 and 6. Benyapa Aimsaard (second round)
See also: 13 and 8. Line Christophersen (final)
See also: 14 and 4. 
Tereza Švábíková (third round)
See also: 15 and 3. 
Jaqueline Lima (third round)
See also: 16 and 7. 
Léonice Huet (second round)