| Champ: | Tseng Chun-hsin |
| Runner: |  Jack Draper |
| Score: | 6–1, 6–7(2–7), 6–4 |
| Before Name: | Wimbledon Championships – Boys' singles |
| After Name: | Wimbledon Championships – Boys' singles |
See main article: 2018 Wimbledon Championships.
Tseng Chun-hsin won the title, defeating Jack Draper in the final, 6–1, 6–7(2–7), 6–4.
Alejandro Davidovich Fokina was the defending champion, but was no longer eligible to participate in junior events. He received a wildcard into the men's singles qualifying competition, where he lost to Peter Polansky in the second round.